CVE-2023-27491 Envoy forwards invalid Http2/Http3 downstream headers

2023-04-0418:18:23

CWE-20

GitHub_M

www.cve.org

5.4 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

9.2 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

43.6%

JSON

Envoy is an open source edge and service proxy designed for cloud-native applications. Compliant HTTP/1 service should reject malformed request lines. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, There is a possibility that non compliant HTTP/1 service may allow malformed requests, potentially leading to a bypass of security policies. This issue is fixed in versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9.

CNA Affected

[
  {
    "vendor": "envoyproxy",
    "product": "envoy",
    "versions": [
      {
        "version": ">= 1.25.0, < 1.25.3",
        "status": "affected"
      },
      {
        "version": ">= 1.24.0, < 1.24.4",
        "status": "affected"
      },
      {
        "version": ">= 1.23.0, < 1.23.6",
        "status": "affected"
      },
      {
        "version": "< 1.22.9",
        "status": "affected"
      }
    ]
  }
]