#VU74474 Input validation error in envoy - CVE-2023-27488
Published: April 5, 2023 / Updated: April 6, 2023
Vulnerability identifier: #VU74474
Vulnerability risk: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2023-27488
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
envoy
envoy
Software vendor:
Cloud Native Computing Foundation
Cloud Native Computing Foundation
Description
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to insufficient validation of user-supplied input when "failure_mode_allow: true" is configured for ext_authz filter. A remote attacker can pass specially crafted input to the application and gain elevated privileges on the target system.
Remediation
Install updates from vendor's website.
External links
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-9g5w-hqr3-w2ph
- 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