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CVE-2022-29224— Segmentation fault leading to crash in Envoy

Quick assessment

Affected
envoyproxy envoy
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Envoy是一款开源的分布式代理服务器。 Envoy 1.22.1 之前的版本存在代码问题漏洞，该漏洞源于使用 gRPC health checking进行健康检查时，攻击者控制的上游服务器可以通过空指针取消引用使 Envoy 崩溃。

CVSS 5.9 · Medium EPSS 0.97% · P59
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I. Basic Information for CVE-2022-29224

Vulnerability Information
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Vulnerability Title
Segmentation fault leading to crash in Envoy
Source: CVE Program / CVE List V5
Vulnerability Description
Envoy is a cloud-native high-performance proxy. Versions of envoy prior to 1.22.1 are subject to a segmentation fault in the GrpcHealthCheckerImpl. Envoy can perform various types of upstream health checking. One of them uses gRPC. Envoy also has a feature which can “hold” (prevent removal) upstream hosts obtained via service discovery until configured active health checking fails. If an attacker controls an upstream host and also controls service discovery of that host (via DNS, the EDS API, etc.), an attacker can crash Envoy by forcing removal of the host from service discovery, and then failing the gRPC health check request. This will crash Envoy via a null pointer dereference. Users are advised to upgrade to resolve this vulnerability. Users unable to upgrade may disable gRPC health checking and/or replace it with a different health checking type as a mitigation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Envoy 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy是一款开源的分布式代理服务器。 Envoy 1.22.1 之前的版本存在代码问题漏洞，该漏洞源于使用 gRPC health checking进行健康检查时，攻击者控制的上游服务器可以通过空指针取消引用使 Envoy 崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
envoyproxy envoy < 1.22.1 -

II. Public POCs for CVE-2022-29224

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III. Intelligence Information for CVE-2022-29224

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Patches & Fixes for CVE-2022-29224 (1)

Vendor Advisories for CVE-2022-29224 (1)

Same Patch Batch · envoyproxy · 2022-06-09 · 5 CVEs total

CVE-2022-29226 10.0 CRITICAL Trivial authentication bypass in Envoy
CVE-2022-29227 7.5 HIGH Use after free in Envoy
CVE-2022-29228 7.5 HIGH Reachable assertion in Envoy
CVE-2022-29225 7.5 HIGH Zip bomb vulnerability in Envoy

IV. Related Vulnerabilities

Same product: envoy
Same vendor: envoyproxy
Same weakness: CWE-476

V. Comments for CVE-2022-29224

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