CVE-2022-23606 Crash when a cluster is deleted in Envoy

2022-02-2222:20:13

CWE-674

GitHub_M

www.cve.org

envoy

cluster discovery service

stack exhaustion

abnormal termination

upgrade

CVSS3

4.4

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.9

Confidence

High

EPSS

0.001

Percentile

32.8%

JSON

Envoy is an open source edge and service proxy, designed for cloud-native applications. When a cluster is deleted via Cluster Discovery Service (CDS) all idle connections established to endpoints in that cluster are disconnected. A recursion was introduced in the procedure of disconnecting idle connections that can lead to stack exhaustion and abnormal process termination when a cluster has a large number of idle connections. This infinite recursion causes Envoy to crash. Users are advised to upgrade.

CNA Affected

[
  {
    "product": "envoy",
    "vendor": "envoyproxy",
    "versions": [
      {
        "status": "affected",
        "version": ">= 1.20.0, < 1.20.2"
      },
      {
        "status": "affected",
        "version": ">= 1.21.0, < 1.21.1"
      }
    ]
  }
]