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CVE-2024-25617— Denial of Service in HTTP Header parser in squid proxy

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 6.5之前版本存在安全漏洞，该漏洞源于允许远程客户端或远程服务器通过发送包含过大的标头HTTP消息导致拒绝服务。

CVSS 5.3 · Medium EPSS 88.09% · P100
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I. Basic Information for CVE-2024-25617

Vulnerability Information
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Vulnerability Title
Denial of Service in HTTP Header parser in squid proxy
Source: CVE Program / CVE List V5
Vulnerability Description
Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Collapse of Data into Unsafe Value bug ,Squid may be vulnerable to a Denial of Service attack against HTTP header parsing. This problem allows a remote client or a remote server to perform Denial of Service when sending oversized headers in HTTP messages. In versions of Squid prior to 6.5 this can be achieved if the request_header_max_size or reply_header_max_size settings are unchanged from the default. In Squid version 6.5 and later, the default setting of these parameters is safe. Squid will emit a critical warning in cache.log if the administrator is setting these parameters to unsafe values. Squid will not at this time prevent these settings from being changed to unsafe values. Users are advised to upgrade to version 6.5. There are no known workarounds for this vulnerability. This issue is also tracked as SQUID-2024:2
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
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 6.5之前版本存在安全漏洞，该漏洞源于允许远程客户端或远程服务器通过发送包含过大的标头HTTP消息导致拒绝服务。
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 < 6.5 -

II. Public POCs for CVE-2024-25617

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III. Intelligence Information for CVE-2024-25617

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Patches & Fixes for CVE-2024-25617 (1)

Vendor Advisories for CVE-2024-25617 (2)

IV. Related Vulnerabilities

Same product: squid
Same vendor: squid-cache
Same weakness: CWE-400

V. Comments for CVE-2024-25617

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