CVE-2020-12723

Published: 1 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.]

Notes

Author	Note
alexmurray	Affects 5.10.0 to 5.30.2

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
perl Launchpad, Ubuntu, Debian	bionic	Released (5.26.1-6ubuntu0.5)
	eoan	Ignored (reached end-of-life)
	focal	Released (5.30.0-9ubuntu0.2)
	groovy	Not vulnerable (5.30.3-4)
	precise	Released (5.14.2-6ubuntu2.11)
	trusty	Released (5.18.2-2ubuntu1.7+esm3)
	upstream	Released (5.28.3,5.30.3)
	xenial	Released (5.22.1-9ubuntu0.9)
	Patches: upstream: https://github.com/perl/perl5/commit/66bbb51b93253a3f87d11c2695cfb7bdb782184a

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Bugs

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