Bug 1934834 (CVE-2021-26813)

Summary:	CVE-2021-26813 python-markdown2: Regular expression denial of service
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	thomas.moschny
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2021-03-04 01:02:02 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1934835, 1934836
Bug Blocks:

Description Pedro Sampaio 2021-03-03 21:11:35 UTC

markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicious string, it can make markdown2 processing difficult or delayed for an extended period of time.

https://github.com/trentm/python-markdown2/pull/387

Comment 1 Pedro Sampaio 2021-03-03 21:12:09 UTC

Created python-markdown2 tracking bugs for this issue:

Affects: epel-8 [bug 1934836]
Affects: fedora-all [bug 1934835]

Comment 2 Product Security DevOps Team 2021-03-04 01:02:02 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.