CVE-2020-12723

Published: 01 June 2020

regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_chunk calls. An application written in Perl would only be vulnerable to this flaw if it evaluates regular expressions supplied by the attacker. Evaluating regular expressions in this fashion is known to be dangerous since the regular expression engine does not protect against denial of service attacks in this usage scenario.]

Priority

Low

CVSS 3 base score: 7.5

Status

Package Release Status
perl
Launchpad, Ubuntu, Debian
Upstream
Released (5.28.3,5.30.3)
Ubuntu 20.10 (Groovy Gorilla) Not vulnerable
(5.30.3-4)
Ubuntu 20.04 LTS (Focal Fossa)
Released (5.30.0-9ubuntu0.2)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.26.1-6ubuntu0.5)
Ubuntu 16.04 LTS (Xenial Xerus)
Released (5.22.1-9ubuntu0.9)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (5.18.2-2ubuntu1.7+esm3)
Ubuntu 12.04 ESM (Precise Pangolin)
Released (5.14.2-6ubuntu2.11)
Patches:
Upstream: https://github.com/perl/perl5/commit/66bbb51b93253a3f87d11c2695cfb7bdb782184a