Bug 2161855 (CVE-2021-32837)

Summary:	CVE-2021-32837 mechanize: Regular Expression Denial of Service
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Last Closed:	2023-01-21 12:52:08 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Bug Depends On:	2161856
Bug Blocks:

Description Avinash Hanwate 2023-01-18 05:16:00 UTC

mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.

https://securitylab.github.com/advisories/GHSL-2021-108-python-mechanize-mechanize/
https://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6
https://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechanize/_urllib2_fork.py#L878-L879
https://github.com/python-mechanize/mechanize/releases/tag/v0.4.6

Comment 1 Avinash Hanwate 2023-01-18 05:16:19 UTC

Created python-mechanize tracking bugs for this issue:

Affects: fedora-all [bug 2161856]

Comment 2 Product Security DevOps Team 2023-01-21 12:52:07 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.