Input validation error in envoy - CVE-2023-27491
Published: April 5, 2023 / Updated: April 6, 2023
Vulnerability identifier: #VU74477
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-27491
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to insufficient validation of user-supplied input within the HTTP/2 and HTTP/3 downstream headers. A remote attacker can bypass the security policies.
Affected software
envoy
Amazon Linux AMI
Istio
OpenShift Service Mesh
Amazon Linux AMI
Istio
OpenShift Service Mesh
How to mitigate CVE-2023-27491
Install updates from vendor's website.
envoy - addressed in versions 1.22.10, 1.23.7, 1.24.5, 1.25.4
Istio - addressed in versions 1.15.7, 1.16.4, 1.17.2
OpenShift Service Mesh - update to 2.2.9
Istio - addressed in versions 1.15.7, 1.16.4, 1.17.2
OpenShift Service Mesh - update to 2.2.9
External References
- https://datatracker.ietf.org/doc/html/rfc9114#section-4.3.1
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-5jmv-cw9p-f9rp
- https://www.rfc-editor.org/rfc/rfc9110#section-5.6.2
- https://datatracker.ietf.org/doc/html/rfc9113#section-8.3
- https://github.com/envoyproxy/envoy/releases/tag/v1.25.4
- https://github.com/envoyproxy/envoy/releases/tag/v1.24.5
- https://github.com/envoyproxy/envoy/releases/tag/v1.23.7
- https://github.com/envoyproxy/envoy/releases/tag/v1.22.10