Bug 861095 (CVE-2022-34749)

Summary:	<dev-python/mistune-2.0.3: ReDoS
Product:	Gentoo Security	Reporter:	John Helmert III <ajak>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	minor	CC:	mgorny, python
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2
Whiteboard:	B3 [noglsa]
Package list:		Runtime testing required:	---
Bug Depends on:	861122
Bug Blocks:

Description John Helmert III archtester

2022-07-26 01:59:28 UTC

CVE-2022-34749:

In mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.

... or ReDoS. Rather annoying that MITRE had assigned this at least 24
days ago (since it's referenced in the commit), but didn't actually
publish it until today.

Anyway, please stabilize 2.0.3

Comment 1 Michał Górny archtester

2022-07-26 07:23:31 UTC

cleanup done.

Comment 2 John Helmert III archtester

2022-07-26 21:19:48 UTC

Thanks, all done!