Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Envoyproxy | Envoy | <= 1.9.0 |
Related Weaknesses (CWE)
References
- https://github.com/envoyproxy/envoy/issues/6435Issue TrackingMitigationThird Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w
- https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM
- https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_historyRelease NotesVendor Advisory
- https://github.com/envoyproxy/envoy/issues/6435Issue TrackingMitigationThird Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w
- https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM
- https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_historyRelease NotesVendor Advisory
FAQ
What is CVE-2019-9901?
CVE-2019-9901 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 cou...
How severe is CVE-2019-9901?
CVE-2019-9901 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-9901?
Check the references section above for vendor advisories and patch information. Affected products include: Envoyproxy Envoy.