Traefik: BasicAuth singleflight coalescing reintroduces an unauthenticated username-enumeration timing oracle
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| traefik | traefik | affected |
|
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Traefik | Traefik |
|
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-8fcf-v89g-xpg6 | Traefik: BasicAuth singleflight coalescing reintroduces an unauthenticated username-enumeration timing oracle |
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.307% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | |
| Metrics |
cvssV3_1
|
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Traefik
Traefik traefik |
|
| Vendors & Products |
Traefik
Traefik traefik |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.7.13, checkPassword in pkg/middlewares/auth/basic_auth.go constructs the BasicAuth singleflight key from the submitted password and stored secret. Concurrent requests for absent usernames therefore coalesce on one key while configured usernames perform separate password hashes, creating an unauthenticated timing discrepancy that reveals whether a username exists. Sequential checks remain cost-equalized, Traefik v2 and Digest authentication are not affected, and the issue does not disclose credentials or bypass authentication. This issue is fixed in version 3.7.13. | |
| Title | Traefik: BasicAuth singleflight coalescing reintroduces an unauthenticated username-enumeration timing oracle | |
| Weaknesses | CWE-208 | |
| References |
| |
| Metrics |
cvssV4_0
|