Vulnerability Details : 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.
Products affected by CVE-2019-9901
- cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-9901
0.36%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 72 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-9901
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L |
2.2
|
3.7
|
MITRE | |
|
10.0
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
3.9
|
6.0
|
NIST |
CWE ids for CVE-2019-9901
-
The product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-9901
-
https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w
Missing HTTP URL path normalization · Advisory · envoyproxy/envoy · GitHub
-
https://groups.google.com/forum/#!topic/envoy-announce/VoHfnDqZiAM
Google GroepenPatch;Third Party Advisory
-
https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history
Version history — envoy tag-v1.9.1 documentationRelease Notes;Vendor Advisory
-
https://github.com/envoyproxy/envoy/issues/6435
CVE-2019-9901 · Issue #6435 · envoyproxy/envoy · GitHubMitigation;Issue Tracking;Third Party Advisory
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