{"id":"CVE-2017-12837","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-12837","generatedAt":"2026-10-28T22:11:17.540Z","title":"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…","description":"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.","published":"2017-09-19T18:29:00.000Z","lastModified":"2026-06-17T01:04:00.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-119"],"affected":["perl/perl"],"epss":{"score":0.06207,"percentile":0.93483,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (6.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.debian.org/security/2017/dsa-3982","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/100860","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1492091","tags":["Issue Tracking","Patch","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://perl5.git.perl.org/perl.git/commitdiff/96c83ed78aeea1a0496dd2b2d935869a822dc8a5","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://perl5.git.perl.org/perl.git/log/refs/tags/v5.24.3-RC1","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://perl5.git.perl.org/perl.git/log/refs/tags/v5.26.1-RC1","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://rt.perl.org/Public/Bug/Display.html?id=131582","source":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20180426-0001/","source":"cve@mitre.org"},{"url":"https://www.oracle.com/security-alerts/cpujul2020.html","source":"cve@mitre.org"},{"url":"http://www.debian.org/security/2017/dsa-3982","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/100860","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1492091","tags":["Issue Tracking","Patch","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://perl5.git.perl.org/perl.git/commitdiff/96c83ed78aeea1a0496dd2b2d935869a822dc8a5","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://perl5.git.perl.org/perl.git/log/refs/tags/v5.24.3-RC1","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://perl5.git.perl.org/perl.git/log/refs/tags/v5.26.1-RC1","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://rt.perl.org/Public/Bug/Display.html?id=131582","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20180426-0001/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpujul2020.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-12837","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}