EnvoyProxy Envoy Missing HTTP URL path normalization
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.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2019-9901US | critical10.0 | — | ||
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.… | ||||
02
references
External citations — patches, advisories, analysis.
- https://github.com/envoyproxy/envoyPACKAGE
- https://github.com/envoyproxy/envoy/blob/main/security/postmortems/cve-2019-9900.mdWEB
- https://github.com/envoyproxy/envoy/commit/e668e669677e52a00d99652b5a260d1cedafdfa8WEB
- https://github.com/envoyproxy/envoy/issues/6435WEB
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2wWEB
- https://groups.google.com/forum/#!topic/envoy-announce/VoHfnDqZiAMWEB
- https://nvd.nist.gov/vuln/detail/CVE-2019-9901ADVISORY
- https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_historyWEB
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