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{"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"}