漏洞信息
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Vulnerability Title
Traefik before v2.11.56 Identity Spoofing via Header Alias
Vulnerability Description
Traefik is an HTTP reverse proxy and load balancer. In Traefik v1.x, v2.x through v2.11.55, and v3.0.0 through v3.7.11, header names are canonicalized only on dashes, so X-Auth-User, X_Auth_User and X.Auth.User are treated as three distinct headers by Traefik, while backends that derive variable names from header names (CGI, WSGI, PHP, NGINX and others) collapse them into a single variable. A client can therefore smuggle a dot-form alias of a header that Traefik manages past the middleware managing it — for example supplying X.Authenticated.User alongside the canonical X-Authenticated-User written by the ForwardAuth middleware — causing such a backend to read the client-supplied value instead of the identity Traefik asserted. In the tested configuration (PHP 8.2 built-in SAPI over an HTTP/1 backend path), Go's lexical header ordering makes the attacker-supplied value win deterministically, so a client that ForwardAuth admits as a low-privilege identity can be treated by the backend as a different user or role. Any header Traefik sets is affected, not only ForwardAuth's. This is an incomplete fix for GHSA-x677-9fxg-v5c5, which blocked only the underscore form. Fixed in v2.11.56 and v3.7.12, which add the aliasHeadersStrategy entry-point option; because it defaults to 'keep' for backwards compatibility, it must be explicitly set to 'delete' or 'reject' for the fix to take effect. Unmaintained release lines will not receive a patch.
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Vulnerability Type
使用欺骗进行的认证绕过
Vulnerability Title
Traefik 授权问题漏洞
Vulnerability Description
Traefik是Traefik公司开源的一款负载均衡器。 Traefik 2.11.56之前版本和3.0.0版本至3.7.13版本存在授权问题漏洞,该漏洞源于仅对连字符形式的标头名称进行规范化,导致X-Auth-User、X_Auth_User和X.Auth.User被识别为不同标头,而后端(如CGI、WSGI、PHP、NGINX等)会将其合并为同一变量,攻击者可利用点号形式的标头别名绕过中间件管理,使后端读取客户端提供的值而非Traefik断言的身份,可能导致低权限身份被后端识别为其他用户或角色。
CVSS Information
N/A
Vulnerability Type
N/A