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.
{ "nvd_published_at": "2019-04-25T16:29:00Z", "cwe_ids": [ "CWE-706" ], "severity": "CRITICAL", "github_reviewed": true, "github_reviewed_at": "2023-07-14T20:27:42Z" }