Envoy: oAuth2 Filter Signout route will not clear cookies because of missing "secure;" flag

Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In versions below 1.32.10 and 1.33.0 through 1.33.6, 1.34.0 through 1.34.4 and 1.35.0, insufficient Session Expiration in the Envoy OAuth2 filter leads to failed logout operations. When configured with __Secure- or __Host- prefixed cookie names, the filter fails to append the required Secure attribute to the Set-Cookie header during deletion. Modern browsers ignore this invalid request, causing the session cookie to persist. This allows a user to remain logged in after they believe they have logged out, creating a session hijacking risk on shared computers. The current implementation iterates through the configured cookie names to generate deletion headers but does not check for these prefixes. This failure to properly construct the deletion header means the user's session cookies are never removed by the browser, leaving the session active and allowing the next user of the same browser to gain unauthorized access to the original user's account and data. This is fixed in versions 1.32.10, 1.33.7, 1.34.5 and 1.35.1.

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

不充分的会话过期机制

Envoy 代码问题漏洞

Envoy是Enphase开源的一款用于连接智能家居设备的网关程序。 Envoy存在代码问题漏洞，该漏洞源于OAuth2 过滤器在删除 __Secure-/__Host- 前缀的会话 Cookie 时漏加 Secure 属性，导致浏览器拒绝删除指令，用户登出后会话仍存活。以下版本受到影响：1.32.10之前版本、1.33.0至1.33.6版本、1.34.0至1.34.4版本和1.35.0版本。

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