CVE-2017-12837

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:*", "matchCriteriaId": "DB276E2C-622C-45EB-8378-35751366049F", "versionEndIncluding": "5.24.2", "vulnerable": true}, {"criteria": "cpe:2.3:a:perl:perl:5.26.0:*:*:*:*:*:*:*", "matchCriteriaId": "B71CAECA-2A6A-4604-863F-3C1C055FB1CE", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow in the S_regatom function in regcomp.c in Perl 5 before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1 allows remote attackers to cause a denial of service (out-of-bounds write) via a regular expression with a '\\N{}' escape and the case-insensitive modifier."}, {"lang": "es", "value": "Un desbordamiento de b\u00fafer en la regi\u00f3n heap de la memoria en la funci\u00f3n S_regatom en el archivo regcomp.c en Perl 5 anterior a versi\u00f3n 5.24.3-RC1 y versi\u00f3n 5.26.x anterior a 5.26.1-RC1, permite a los atacantes remotos causar una denegaci\u00f3n de servicio (escritura fuera de l\u00edmites) por medio de una expresi\u00f3n regular con un escape '\\N{}' y el modificador que no distingue entre may\u00fasculas y min\u00fasculas."}], "id": "CVE-2017-12837", "lastModified": "2026-06-17T01:04:00.390", "metrics": {"cvssMetricV2": [{"acInsufInfo": true, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-09-19T18:29:00.167", "references": [{"source": "cve@mitre.org", "url": "http://www.debian.org/security/2017/dsa-3982"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/100860"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Patch", "Third Party Advisory", "VDB Entry"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1492091"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": 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"https://www.oracle.com/security-alerts/cpujul2020.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Sawyer X (Perl) for reporting this issue.", "bugzilla": {"description": "perl: Heap buffer overflow in regular expression compiler", "id": "1492091", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1492091"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-122", "details": ["Heap-based buffer overflow in the S_regatom function in regcomp.c in Perl 5 before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1 allows remote attackers to cause a denial of service (out-of-bounds write) via a regular expression with a '\\N{}' escape and the case-insensitive modifier.", "A heap write buffer overflow was found in perl's S_regatom() function, which is used in the compilation of regular expressions, resulting in the crash of the perl interpreter. An attacker, able to provide a specially crafted regular expression, could cause a denial of service."], "name": "CVE-2017-12837", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "perl", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "perl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "perl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:2", "fix_state": "Will not fix", "package_name": "rh-perl520-perl", "product_name": "Red Hat Software Collections"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:2", "fix_state": "Will not fix", "package_name": "rh-perl524-perl", "product_name": "Red Hat Software Collections"}], "public_date": "2017-09-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-12837\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-12837"], "statement": "This issue does not affect perl versions older than 5.18. Perl as shipped in Red Hat Enterprise Linux 7 and older are not affected by this vulnerability.", "threat_severity": "Low"}

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