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

• GHSA-8fg9-p83m-x5pq
• pyupio/dparse@8c99017
• pyupio/dparse@d87364f
• 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