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

Author	Note
alexmurray	Affects 5.005 to 5.30.2

Priority

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

References

Bugs

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962005

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