CVE-2023-45813

Advisory

Validators 0.21.0 includes a fix for CVE-2023-45813: Inefficient Regular Expression Complexity in validate_link.
https://github.com/DedSecInside/TorBot/security/advisories/GHSA-72qw-p7hh-m3ff
https://github.com/python-validators/validators/pull/243

Affected package

Affected versions

Fixed versions

Vulnerability changelog

Torbot is an open source tor network intelligence tool. In affected versions the `torbot.modules.validators.validate_link function` uses the python-validators URL validation regex. This particular regular expression has an exponential complexity which allows an attacker to cause an application crash using a well-crafted argument. An attacker can use a well-crafted URL argument to exploit the vulnerability in the regular expression and cause a Denial of Service on the system. The validators file has been removed in version 4.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability. See CVE-2023-45813.


MISC:https://github.com/DedSecInside/TorBot/commit/ef6e06bc7785355b1701d5524eb4550441086ac4: https://github.com/DedSecInside/TorBot/commit/ef6e06bc7785355b1701d5524eb4550441086ac4
MISC:https://github.com/DedSecInside/TorBot/security/advisories/GHSA-72qw-p7hh-m3ff: https://github.com/DedSecInside/TorBot/security/advisories/GHSA-72qw-p7hh-m3ff

Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45813
• https://github.com/DedSecInside/TorBot/security/advisories/GHSA-72qw-p7hh-m3ff
• https://github.com/DedSecInside/TorBot/commit/ef6e06bc7785355b1701d5524eb4550441086ac4