| Name | CVE-2024-6844 |
| Description | A vulnerability in corydolphin/flask-cors version 4.0.1 allows for inconsistent CORS matching due to the handling of the '+' character in URL paths. The request.path is passed through the unquote_plus function, which converts the '+' character to a space ' '. This behavior leads to incorrect path normalization, causing potential mismatches in CORS configuration. As a result, endpoints may not be matched correctly to their CORS settings, leading to unexpected CORS policy application. This can cause unauthorized cross-origin access or block valid requests, creating security vulnerabilities and usability issues. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1100988 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| python-flask-cors (PTS) | bullseye | 3.0.9-2 | vulnerable |
| bookworm | 3.0.10-2 | vulnerable |
| trixie, sid | 5.0.1-1 | vulnerable |
The information below is based on the following data on fixed versions.
Notes
[trixie] - python-flask-cors <postponed> (Minor issue, revisit when fixed upstream)
[bookworm] - python-flask-cors <postponed> (Minor issue, revisit when fixed upstream)
https://huntr.com/bounties/731a6cd4-d05f-4fe6-8f5b-fe088d7b34e0
https://github.com/corydolphin/flask-cors/issues/385