Traefik Vulnerable to BasicAuth/DigestAuth Identity Spoofing via Non-Canonical headerField
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.11.42, 3.6.11, 3.7.0-ea.3, 3.6.12
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.42, 3.6.11, and 3.7.0-ea.3, when `headerField` is configured with a non-canonical HTTP header name (e.g., `x-auth-user` instead of `X-Auth-User`), an authenticated attacker can inject their own canonical version of that header to impersonate any identity to the backend. The backend receives two header entries — the attacker-injected canonical one is read first, overriding Traefik's non-canonical write. Versions 2.11.42, 3.6.11, and 3.7.0-ea.3 patch the issue.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- traefik traefik
fixed in 2.11.42; From 3.0.0-beta1 · fixed in 3.6.11; From 3.7.0-ea.1 · fixed in 3.7.0-ea.3
- github.com/traefik/traefikGo
All versions
- github.com/traefik/traefik/v2Go
fixed in 2.11.42
- github.com/traefik/traefik/v3Go
From 3.0.0-beta1 · fixed in 3.6.12; From 3.7.0-ea.1 · fixed in 3.7.0-ea.3
- github.com/traefik/traefik/v3Go
From 3.0.0-beta1 · fixed in 3.6.12
- github.com/traefik/traefik/v3Go
From 3.7.0-ea.1 · fixed in 3.7.0-ea.3