Path Traversal Vulnerability in Envoy Proxy

CVE-2019-9901 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

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.

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