Description (CNA)
Traefik versions <= v2.11.51, >= v3.6.0 <= v3.6.22, and >= v3.7.0 <= v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator (e.g. regex "^/api(.*)", replacement "/$1"), the middleware forwards the replaced path to the backend without validating that it matches its normalized form. An unauthenticated remote attacker can send a crafted request (e.g. GET /api../admin) that produces an un-normalized path such as /../admin, which a backend that normalizes paths resolves to a protected route, bypassing authentication middleware. Fixed in v2.11.52, v3.6.23, and v3.7.7.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| traefik / traefik | affected 0 before 2.11.52; unaffected 2.11.52 |
| traefik / traefik | affected 3.6.0 before 3.6.23; unaffected 3.6.23 |
| traefik / traefik | affected 3.7.0 before 3.7.7; unaffected 3.7.7 |
CWE
CWE-22
References
- https://github.com/traefik/traefik/security/advisories/GHSA-cxjq-mrr5-89rv
- https://www.vulncheck.com/advisories/traefik-before-authentication-bypass-via-replacepathregex
ADP enrichment
No English description supplied.
No references supplied.