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CVE-2017-12837

Published: 19 September 2017

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.

Notes

AuthorNote
leosilva
portion of affected code is quite different in precise, needs triage
could not reproduce in precise.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
perl
Launchpad, Ubuntu, Debian
artful Not vulnerable
(5.26.0-8ubuntu1)
trusty
Released (5.18.2-2ubuntu1.3)
upstream
Released (5.26.0-8)
xenial
Released (5.22.1-9ubuntu0.2)
zesty
Released (5.24.1-2ubuntu1.1)
Patches:
upstream: https://perl5.git.perl.org/perl.git/commitdiff/96c83ed78aeea1a0496dd2b2d935869a822dc8a5

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H