CVE-2023-35943CWE-416

Envoy vulnerable to CORS filter segfault when origin header is removed

Medium · published July 25, 2023

CVSS v3.1
6.3
EPSS
1%
Percentile
51.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00661 · 51.0th percentile
Weakness
CWE-416 · Use After Free
Published
2023-07-25T18:26Z
EPSS history
Timeline
  • 25 JUL 18:26Z
    Envoy vulnerable to CORS filter segfault when origin header is removed
    cvelistv5