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CVE-2021-38161— Not validating origin TLS certificate

Quick assessment

Affected
Apache Software Foundation Apache Traffic Server
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.

Apache Traffic Server（ATS）是美国阿帕奇（Apache）基金会的一套可扩展的HTTP代理和缓存服务器。 Apache Traffic 8.0.0至8.0.8版本存在安全漏洞，该漏洞源于程序没有对标头进行正确解析。以下产品及版本受到影响：Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0。

AI Predicted 7.5 Difficulty: Moderate EPSS 1.89% · P78

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2021-38161

Vulnerability Information
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Vulnerability Title
Not validating origin TLS certificate
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Authentication vulnerability in TLS origin verification of Apache Traffic Server allows for man in the middle attacks. This issue affects Apache Traffic Server 8.0.0 to 8.0.8.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Traffic Server 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Traffic Server（ATS）是美国阿帕奇（Apache）基金会的一套可扩展的HTTP代理和缓存服务器。 Apache Traffic 8.0.0至8.0.8版本存在安全漏洞，该漏洞源于程序没有对标头进行正确解析。以下产品及版本受到影响：Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0。
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
Apache Software Foundation Apache Traffic Server 8.0.0 to 8.0.8 -

II. Public POCs for CVE-2021-38161

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III. Intelligence Information for CVE-2021-38161

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Vendor Advisories for CVE-2021-38161 (1)

Mailing List Discussions for CVE-2021-38161 (1)

Same Patch Batch · Apache Software Foundation · 2021-11-03 · 6 CVEs total

CVE-2021-37147 Request Smuggling - LF line ending
CVE-2021-37148 Request Smuggling - transfer encoding validation
CVE-2021-37149 Request Smuggling - multiple attacks
CVE-2021-41585 ATS stops accepting connections on FreeBSD
CVE-2021-43082 heap-buffer-overflow with stats-over-http plugin

IV. Related Vulnerabilities

Same product: Apache Traffic Server
Same vendor: Apache Software Foundation
Same weakness: CWE-287

V. Comments for CVE-2021-38161

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