Vulnerability in Envoyproxy Envoy
CVE-2019-9901
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.
EPSS: 0.027 (84.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L.
Affected products
- Envoyproxy Envoy
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Release Notes, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory, Mitigation, Issue Tracking)
- cve@mitre.org (x_refsource_CONFIRM)
- cve@mitre.org (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2019-9901?
- CVE-2019-9901 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Use of Incorrectly-Resolved Name or Reference. CVSS score: 6.5/10. Published 2019-04-25.
- How severe is CVE-2019-9901?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2019-9901 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.