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CVE-2022-29226— Trivial authentication bypass 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 之前的版本存在访问控制错误漏洞，该漏洞源于允许在存在附加请求的访问令牌的情况下进行访问。

CVSS 10.0 · Critical EPSS 1.30% · P68

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2022-29226

Vulnerability Information
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Vulnerability Title
Trivial authentication bypass in Envoy
Source: CVE Program / CVE List V5
Vulnerability Description
Envoy is a cloud-native high-performance proxy. In versions prior to 1.22.1 the OAuth filter implementation does not include a mechanism for validating access tokens, so by design when the HMAC signed cookie is missing a full authentication flow should be triggered. However, the current implementation assumes that access tokens are always validated thus allowing access in the presence of any access token attached to the request. Users are advised to upgrade. There is no known workaround for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Envoy 访问控制错误漏洞
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 之前的版本存在访问控制错误漏洞，该漏洞源于允许在存在附加请求的访问令牌的情况下进行访问。
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-2022-29226

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III. Intelligence Information for CVE-2022-29226

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Patches & Fixes for CVE-2022-29226 (1)

Vendor Advisories for CVE-2022-29226 (1)

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

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
CVE-2022-29224 5.9 MEDIUM Segmentation fault leading to crash in Envoy

IV. Related Vulnerabilities

Same product: envoy
Same vendor: envoyproxy
Same weakness: CWE-306

V. Comments for CVE-2022-29226

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