CVE-2022-23632
Traefik is an HTTP reverse proxy and load balancer.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.6.1, Traefik skips the router transport layer security (TLS) configuration when the host header is a fully qualified domain name (FQDN). For a request, the TLS configuration choice can be different than the router choice, which implies the use of a wrong TLS configuration. When sending a request using FQDN handled by a router configured with a dedicated TLS configuration, the TLS configuration falls back to the default configuration that might not correspond to the configured one. If the CNAME flattening is enabled, the selected TLS configuration is the SNI one and the routing uses the CNAME value, so this can skip the expected TLS configuration. Version 2.6.1 contains a patch for this issue. As a workaround, one may add the FDQN to the host rule. However, there is no workaround if the CNAME flattening is enabled.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.71% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- traefik/traefik · oracle/communications unified inventory management
- Source
- security-advisories@github.com
References
- https://github.com/traefik/traefik/pull/8764Issue Tracking, Patch, Third Party Advisory
- https://github.com/traefik/traefik/releases/tag/v2.6.1Release Notes, Third Party Advisory
- https://github.com/traefik/traefik/security/advisories/GHSA-hrhx-6h34-j5hcPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlThird Party Advisory
- https://github.com/traefik/traefik/pull/8764Issue Tracking, Patch, Third Party Advisory
- https://github.com/traefik/traefik/releases/tag/v2.6.1Release Notes, Third Party Advisory
- https://github.com/traefik/traefik/security/advisories/GHSA-hrhx-6h34-j5hcPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.