CVE-2024-23323 Excessive CPU usage when URI template matcher is configured using regex in Envoy

2024-02-0922:50:18

CWE-400

CWE-1176

GitHub_M

github.com

cve-2024-23323

envoy

regex

cpu usage

latency

upgrade

CVSS3

4.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

AI Score

6.7

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

Envoy is a high-performance edge/middle/service proxy. The regex expression is compiled for every request and can result in high CPU usage and increased request latency when multiple routes are configured with such matchers. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CNA Affected

[
  {
    "vendor": "envoyproxy",
    "product": "envoy",
    "versions": [
      {
        "status": "affected",
        "version": ">= 1.29.0, < 1.29.1"
      },
      {
        "status": "affected",
        "version": ">= 1.28.0, < 1.28.1"
      },
      {
        "status": "affected",
        "version": ">= 1.27.0, < 1.27.3"
      },
      {
        "status": "affected",
        "version": "< 1.26.7"
      }
    ]
  }
]