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CVE-2021-35474— Dynamic stack buffer overflow in cachekey plugin

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存在缓冲区错误漏洞，该漏洞源于Apache Traffic Server的cachekey插件基于堆栈的缓冲区溢出漏洞。

AI Predicted 8.8 Difficulty: Moderate EPSS 2.71% · P85

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-35474

Vulnerability Information
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Vulnerability Title
Dynamic stack buffer overflow in cachekey plugin
Source: CVE Program / CVE List V5
Vulnerability Description
Stack-based Buffer Overflow vulnerability in cachekey plugin of Apache Traffic Server. 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
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Traffic Server 缓冲区错误漏洞
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存在缓冲区错误漏洞，该漏洞源于Apache Traffic Server的cachekey插件基于堆栈的缓冲区溢出漏洞。
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-2021-35474

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III. Intelligence Information for CVE-2021-35474

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Vendor Advisories for CVE-2021-35474 (1)

Mailing List Discussions for CVE-2021-35474 (1)

Same Patch Batch · Apache Software Foundation · 2021-06-30 · 3 CVEs total

CVE-2021-32567 Reading HTTP/2 frames too many times
CVE-2021-32566 Specific sequence of HTTP/2 frames can cause ATS to crash

IV. Related Vulnerabilities

Same product: Apache Traffic Server
Same vendor: Apache Software Foundation
Same weakness: CWE-121

V. Comments for CVE-2021-35474

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