CVE-2023-35942

Published: Jul 25, 2023Modified: Jun 17, 2026

6.5

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability: 2.8 / Impact: 3.6

Source: NVD

Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, gRPC access loggers using listener's global scope can cause a `use-after-free` crash when the listener is drained. Versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12 have a fix for this issue. As a workaround, disable gRPC access log or stop listener update.

Affected (4)

Products: Envoyproxy: Envoy

Envoyproxy

1 product

Envoy

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Envoyproxy Envoy	From 1.23.0 to 1.23.12
Envoyproxy Envoy	From 1.24.0 to 1.24.10
Envoyproxy Envoy	From 1.25.0 to 1.25.9
Envoyproxy Envoy	From 1.26.0 to 1.26.4

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (2)

https://github.com/envoyproxy/envoy/security/advisories/GHSA-69vr-g55c-v2v4

Source: security-advisories@github.com

ExploitThird Party Advisory

https://github.com/envoyproxy/envoy/security/advisories/GHSA-69vr-g55c-v2v4

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party Advisory

Timeline

No history available yet.