CVE-2023-35943 MEDIUM

CVE-2023-35943: Envoy vulnerable to CORS filter segfault when origin header is removed

Vendor Envoyproxy
Product envoy
Weakness CWE-416
Published July 25, 2023
Last update October 24, 2024
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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, the CORS filter will segfault and crash Envoy when the `origin` header is removed and deleted between `decodeHeaders`and `encodeHeaders`. 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, do not remove the `origin` header in the Envoy configuration.

Key dates

02Disclosure timeline

July 25, 2023 CVE published
October 24, 2024 Record updated