CVEvulnerability

CVE-2023-27493

9.1 CRITICAL Published 2023-04-04 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-04-04
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS 3.1 ([email protected])
9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-20, CWE-444

Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy does not sanitize or escape request properties when generating request headers. This can lead to characters that are illegal in header values to be sent to the upstream service. In the worst case, it can cause upstream service to interpret the original request as two pipelined requests, possibly bypassing the intent of Envoy’s security policy. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. As a workaround, disable adding request headers based on the downstream request properties, such as downstream certificate properties.

Affected configurations

• envoyproxy envoy (< 1.22.9) • envoyproxy envoy (>= 1.23.0 < 1.23.6) • envoyproxy envoy (>= 1.24.0 < 1.24.4) • envoyproxy envoy (>= 1.25.0 < 1.25.3)

Related

Weakness · CWE (2)

  • CWE-20 Improper Input Validation weakness
  • CWE-444 Inconsistent Interpretation of HTTP Requests weakness

References