Open redirect in Traefik
Vulnerability Description
In Traefik before versions 1.7.26, 2.2.8, and 2.3.0-rc3, there exists a potential open redirect vulnerability in Traefik's handling of the "X-Forwarded-Prefix" header. The Traefik API dashboard component doesn't validate that the value of the header "X-Forwarded-Prefix" is a site relative path and will redirect to any header provided URI. Successful exploitation of an open redirect can be used to entice victims to disclose sensitive information. Active Exploitation of this issue is unlikely as it would require active header injection, however the Traefik team addressed this issue nonetheless to prevent abuse in e.g. cache poisoning scenarios.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/containous/traefik/security/advisories/GHSA-6qq8-5wq3-86rp
- https://github.com/containous/traefik/releases/tag/v1.7.26
- https://github.com/containous/traefik/releases/tag/v2.2.8
- https://github.com/containous/traefik/releases/tag/v2.3.0-rc3
- https://github.com/containous/traefik/pull/7109
- https://github.com/containous/traefik/commit/e63db782c11c7b8bfce30be4c902e7ef8f9f33d2
Affected Vendor
containous
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