envoyproxy/envoy · Security
EnvoyProxy Envoy Missing HTTP URL path normalization
- GHSA ID
- GHSA-2wmf-p7f8-w42h
- CVE ID
- CVE-2019-9901
- Severity
- critical
- Published
- Updated
- CVSS
- 10 · CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CVSS v3
- 10 · CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Description
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.
CWEs
- CWE-706 · Use of Incorrectly-Resolved Name or Reference
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w ↗
- https://nvd.nist.gov/vuln/detail/CVE-2019-9901 ↗
- https://github.com/envoyproxy/envoy/issues/6435 ↗
- https://groups.google.com/forum/#!topic/envoy-announce/VoHfnDqZiAM ↗
- https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history ↗
- https://github.com/envoyproxy/envoy/blob/main/security/postmortems/cve-2019-9900.md ↗
- https://github.com/envoyproxy/envoy/commit/e668e669677e52a00d99652b5a260d1cedafdfa8 ↗
- https://github.com/advisories/GHSA-2wmf-p7f8-w42h ↗