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CVE-2020-10878

Published: 1 June 2020

Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection. 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.]

Notes

AuthorNote
alexmurray
Affects 5.005 to 5.30.2

Priority

Low

Cvss 3 Severity Score

8.6

Score breakdown

Status

Package Release Status
perl
Launchpad, Ubuntu, Debian
focal
Released (5.30.0-9ubuntu0.2)
bionic
Released (5.26.1-6ubuntu0.5)
eoan Ignored
(end of life)
groovy Not vulnerable
(5.30.3-4)
trusty
Released (5.18.2-2ubuntu1.7+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.28.3,5.30.3)
xenial
Released (5.22.1-9ubuntu0.9)
Patches:
upstream: https://github.com/perl/perl5/commit/0a320d753fe7fca03df259a4dfd8e641e51edaa8
upstream: https://github.com/perl/perl5/commit/3295b48defa0f8570114877b063fe546dd348b3c

Severity score breakdown

Parameter Value
Base score 8.6
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact Low
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H