CVE-2021-32837

Advisory

Mechanize 0.4.6 includes a fix for CVE-2021-32837: Mechanize 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.
https://securitylab.github.com/advisories/GHSL-2021-108-python-mechanize-mechanize

Affected package

Affected versions

Fixed versions

Vulnerability changelog

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. See CVE-2021-32837.


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

Resources

• https://securitylab.github.com/advisories/GHSL-2021-108-python-mechanize-mechanize/
• https://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechaniz
• https://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6
• https://github.com/python-mechanize/mechanize/releases/tag/v0.4.6
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32837
• https://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechanize/_urllib2_fork.py#L878-L879
• https://lists.debian.org/debian-lts-announce/2023/06/msg00022.html