CVE-2021-32837: GHSL-2021-108: ReDoS (Regular Expression Denial of Service) in mechanize - CVE-2021-32837
mechanize contains a regular expression that is vulnerable to ReDoS (Regular Expression Denial of Service).
Other sources
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.
— GitHub
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2021-32837?
CVE-2021-32837 is a vulnerability in the mechanize library that allows for regular expression denial of service (ReDoS) attacks, potentially causing crashes.
How does CVE-2021-32837 affect me?
If you are using the mechanize library prior to version 0.4.6, your application may be vulnerable to ReDoS attacks, leading to potential crashes.
What is regular expression denial of service (ReDoS)?
Regular expression denial of service (ReDoS) is a vulnerability where a maliciously crafted input can cause a regular expression pattern to exhibit exponential time complexity, leading to a denial of service.
How can I mitigate CVE-2021-32837?
To mitigate CVE-2021-32837, update the mechanize library to version 0.4.6 or later, which contains a patch for the vulnerability.
Are there any references for more information about CVE-2021-32837?
Yes, you can find more information about CVE-2021-32837 in the following references: [link1](https://github.com/python-mechanize/mechanize/blob/3acb1836f3fd8edc5a758a417dd46b53832ae3b5/mechanize/_urllib2_fork.py#L878-L879), [link2](https://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6), [link3](https://github.com/python-mechanize/mechanize/releases/tag/v0.4.6)