漏洞描述

Envoy是一款开源的分布式代理服务器。 Envoy 1.9.0及之前版本中存在访问控制错误漏洞。攻击者可利用该漏洞绕过访问控制。

Envoy 1.9.0 and before does not normalize HTTP URL paths. A remote attacker may craft a relative path, e.g., something/../admin, to bypass access control, e.g., a block on /admin. A backend server could then interpret the non-normalized path and provide an attacker access beyond the scope provided for by the access control policy.