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CVE-2021-32565— HTTP Request Smuggling, content length with invalid charters

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 Server存在安全漏洞，该漏洞源于发送给Apache Traffic Server的Content-Length报头中的无效值允许攻击者可利用该漏洞偷运请求。Apache Traffic Server 7.0.0 ~ 7.1.12、8.0.0 ~ 8.1.1、9.0.0 ~ 9.0.1。

AI Predicted 9.1 Difficulty: Easy EPSS 2.14% · P81
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I. Basic Information for CVE-2021-32565

Vulnerability Information
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Vulnerability Title
HTTP Request Smuggling, content length with invalid charters
Source: CVE Program / CVE List V5
Vulnerability Description
Invalid values in the Content-Length header sent to Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Traffic Server 环境问题漏洞
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 Server存在安全漏洞，该漏洞源于发送给Apache Traffic Server的Content-Length报头中的无效值允许攻击者可利用该漏洞偷运请求。Apache Traffic Server 7.0.0 ~ 7.1.12、8.0.0 ~ 8.1.1、9.0.0 ~ 9.0.1。
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 Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1 -

II. Public POCs for CVE-2021-32565

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III. Intelligence Information for CVE-2021-32565

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Vendor Advisories for CVE-2021-32565 (1)

Mailing List Discussions for CVE-2021-32565 (1)

IV. Related Vulnerabilities

Same product: Apache Traffic Server
Same vendor: Apache Software Foundation
Same weakness: CWE-444

V. Comments for CVE-2021-32565

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