HTTP: Squid Proxy Cache Manager Expired Pointer Dereference
This signature detects attempts to exploit a known vulnerability against Squid Proxy. A successful attack can result in a denial-of-service condition.
Extended 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`.
Affected Products
Squid-cache squid
References
CVE: CVE-2024-23638
Short Name
HTTP:DOS:SQUID-CACHE-POID
Severity
Major
Recommended
False
Recommended Action
Drop
Category
HTTP
Keywords
CVE-2024-23638 Cache Dereference Expired Manager Pointer Proxy Squid
Release Date
07/04/2024
Supported Platforms
srx-branch-19.3
vsrx3bsd-19.2
srx-19.4
vsrx3bsd-19.4
srx-branch-19.4
vsrx-19.4
vsrx-19.2
srx-19.3
Sigpack Version
3720
False Positive
Unknown
Vendors
Squid-cache