| Name | CVE-2024-6839 |
| Description | corydolphin/flask-cors version 4.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes longer regex patterns over more specific ones when matching paths, which can lead to less restrictive CORS policies being applied to sensitive endpoints. This mismatch in regex pattern priority allows unauthorized cross-origin access to sensitive data or functionality, potentially exposing confidential information and increasing the risk of unauthorized actions by malicious actors. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4197-1 |
| Debian Bugs | 1100988 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-flask-cors (PTS) | bullseye | 3.0.9-2 | vulnerable |
| bullseye (security) | 3.0.9-2+deb11u1 | fixed | |
| bookworm | 3.0.10-2 | vulnerable | |
| trixie | 6.0.0-1 | vulnerable | |
| sid | 6.0.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-flask-cors | source | bullseye | 3.0.9-2+deb11u1 | DLA-4197-1 | ||
| python-flask-cors | source | (unstable) | 6.0.1-1 | 1100988 |
[bookworm] - python-flask-cors <postponed> (Minor issue, revisit when fixed upstream)
https://huntr.com/bounties/403eb1fc-86f4-4820-8eba-0f3dfae9f2b4
https://github.com/advisories/GHSA-7rxf-gvfg-47g4
Fixed by: https://github.com/corydolphin/flask-cors/commit/e970988bea563e05e8b8f53fa7bcc134b5bf5c5f (6.0.0)
Follow up for incomplete fix: https://github.com/corydolphin/flask-cors/pull/392
Fixed by: https://github.com/corydolphin/flask-cors/commit/4ad56d6c20252d36031c74ba8386a81e94286f40 (6.0.1.dev)