Authelia is a a single sign-on multi-factor portal for web apps. This affects uses who are using nginx ngx_http_auth_request_module with Authelia, it allows a malicious individual who crafts a malformed HTTP request to bypass the authentication mechanism. It additionally could theoretically affect other proxy servers, but all of the ones we officially support except nginx do not allow malformed URI paths. The problem is rectified entirely in v4.29.3. As this patch is relatively straightforward we can back port this to any version upon request. Alternatively we are supplying a git patch to 4.25.1 which should be relatively straightforward to apply to any version, the git patches for specific versions can be found in the references. The most relevant workaround is upgrading. You can also add a block which fails requests that contains a malformed URI in the internal location block.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2021-05-28T17:00:12
Updated: 2024-08-03T23:25:30.869Z
Reserved: 2021-05-12T00:00:00
Link: CVE-2021-32637
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-05-28T17:15:07.493
Modified: 2024-11-21T06:07:25.700
Link: CVE-2021-32637
Redhat
No data.