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CVE-2024-23638— SQUID-2023:11 Denial of Service in Cache Manager

Quick assessment

Affected
squid-cache squid
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Squid是一套代理服务器和Web缓存服务器软件。该软件提供缓存万维网、过滤流量、代理上网等功能。 Squid 6.6之前版本存在安全漏洞，该漏洞源于过期指针引用错误，从而导致应用程序拒绝服务。

CVSS 6.5 · Medium EPSS 60.05% · P99

Possible ATT&CK Techniques 1 AI

T1499.001 · OS Exhaustion Flood
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I. Basic Information for CVE-2024-23638

Vulnerability Information
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Vulnerability Title
SQUID-2023:11 Denial of Service in Cache Manager
Source: CVE Program / CVE List V5
Vulnerability Description
Squid is a caching proxy for the Web. Due to an expired pointer reference bug, Squid prior to version 6.6 is vulnerable to a Denial of Service attack against Cache Manager error responses. This problem allows a trusted client to perform Denial of Service when generating error pages for Client Manager reports. Squid older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. As a workaround, prevent access to Cache Manager using Squid's main access control: `http_access deny manager`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
无效指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Squid 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Squid是一套代理服务器和Web缓存服务器软件。该软件提供缓存万维网、过滤流量、代理上网等功能。 Squid 6.6之前版本存在安全漏洞，该漏洞源于过期指针引用错误，从而导致应用程序拒绝服务。
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
squid-cache squid < 6.6 -

II. Public POCs for CVE-2024-23638

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III. Intelligence Information for CVE-2024-23638

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Patches & Fixes for CVE-2024-23638 (2)

Vendor Advisories for CVE-2024-23638 (2)

Mailing List Discussions for CVE-2024-23638 (2)

Security Blog Posts for CVE-2024-23638 (1)

Other References for CVE-2024-23638 (2)

IV. Related Vulnerabilities

Same product: squid
Same vendor: squid-cache
Same weakness: CWE-825

V. Comments for CVE-2024-23638

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