OAuth2 Proxy: Health Check User-Agent Matching Bypasses Authentication in auth_request Mode

OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions prior to 7.15.2 contain a configuration-dependent authentication bypass in deployments where OAuth2 Proxy is used with an auth_request-style integration (such as nginx auth_request) and either --ping-user-agent is set or --gcp-healthchecks is enabled. In affected configurations, OAuth2 Proxy treats any request with the configured health check User-Agent value as a successful health check regardless of the requested path, allowing an unauthenticated remote attacker to bypass authentication and access protected upstream resources. Deployments that do not use auth_request-style subrequests or that do not enable --ping-user-agent/--gcp-healthchecks are not affected. This issue is fixed in 7.15.2.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

使用欺骗进行的认证绕过

OAuth2 Proxy 安全漏洞

OAuth2 Proxy是一款能够提供与Google、Github或其他提供商进行身份验证的反向代理。 OAuth2 Proxy 7.15.2之前版本存在安全漏洞，该漏洞源于配置相关的身份验证绕过，可能导致未经身份验证的远程攻击者绕过身份验证并访问受保护的上游资源。

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