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CVE-2024-35161— Apache Traffic Server: Incomplete check for chunked trailer section allows request smuggling

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 8.0.0版本至8.1.10版本和9.0.0版本至9.2.4版本存在输入验证错误漏洞，该漏洞源于将格式错误的 HTTP 分块尾部转发到原始服务器。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.97% · P61

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-35161

Vulnerability Information
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Vulnerability Title
Apache Traffic Server: Incomplete check for chunked trailer section allows request smuggling
Source: CVE Program / CVE List V5
Vulnerability Description
Apache Traffic Server forwards malformed HTTP chunked trailer section to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users can set a new setting (proxy.config.http.drop_chunked_trailers) not to forward chunked trailer section. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.
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 输入验证错误漏洞
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 8.0.0版本至8.1.10版本和9.0.0版本至9.2.4版本存在输入验证错误漏洞，该漏洞源于将格式错误的 HTTP 分块尾部转发到原始服务器。
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 ~ 8.1.10 -

II. Public POCs for CVE-2024-35161

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III. Intelligence Information for CVE-2024-35161

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Mailing List Discussions for CVE-2024-35161 (1)

Same Patch Batch · Apache Software Foundation · 2024-07-26 · 4 CVEs total

CVE-2023-38522 Apache Traffic Server: Incomplete field name check allows request smuggling
CVE-2024-35296 Apache Traffic Server: Invalid Accept-Encoding can force forwarding requests
CVE-2024-25090 Apache Roller: Insufficient input validation for some user profile and bookmark fields whe

IV. Related Vulnerabilities

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

V. Comments for CVE-2024-35161

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