Impact
dparse versions prior to 0.5.1 contain a regular expression that is vulnerable to ReDoS (Regular Expression Denial of Service).
All users parsing index server URLs with dparse are impacted by this vulnerability.
Patches
The Patch is applied in the 0.5.2 version, all users are recommended to upgrade as soon as possible.
Workarounds
Avoid passing index server URLs in the source file to be parsed.
References
https://github.com/pyupio/dparse/tree/security/remove-intensive-regex
For more information
If you have any questions or comments about this advisory:
- Email us at support@pyup.io
References
- https://github.com/pyupio/dparse/security/advisories/GHSA-8fg9-p83m-x5pq
- https://github.com/pyupio/dparse/commit/8c990170bbd6c0cf212f1151e9025486556062d5
- https://github.com/pyupio/dparse/commit/d87364f9db9ab916451b1b036cfeb039e726e614
- https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS
- https://nvd.nist.gov/vuln/detail/CVE-2022-39280
- https://github.com/pypa/advisory-database/tree/main/vulns/dparse/PYSEC-2022-301.yaml
- https://github.com/advisories/GHSA-8fg9-p83m-x5pq