CVE-2021-32837

Public Exploit
mechanize vulnerable to ReDoS

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 4.07% Top 15%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: python-mechanize mechanize
Published at:
Updated at:

References

Link Tags
https://securitylab.github.com/advisories/GHSL-2021-108-python-mechanize-mechanize/ third party advisory exploit
https://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechanize/_urllib2_fork.py#L878-L879 third party advisory exploit
https://github.com/python-mechanize/mechanize/releases/tag/v0.4.6 third party advisory
https://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6 third party advisory patch
https://lists.debian.org/debian-lts-announce/2023/06/msg00022.html mailing list

Frequently Asked Questions

What is the severity of CVE-2021-32837?
CVE-2021-32837 has been scored as a high severity vulnerability.
How to fix CVE-2021-32837?
To fix CVE-2021-32837, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-32837 being actively exploited in the wild?
It is possible that CVE-2021-32837 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32837?
CVE-2021-32837 affects python-mechanize mechanize.
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