Squid Web Proxy up to 6.5 Cache Manager Error Response expired pointer dereference

Summaryinfo

A vulnerability was found in Squid Web Proxy up to 6.5 and classified as problematic. The affected element is an unknown function of the component Cache Manager Error Response Handler. Such manipulation leads to expired pointer dereference. This vulnerability is documented as CVE-2024-23638. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Squid Web Proxy up to 6.5 (Firewall Software) and classified as problematic. Affected by this issue is an unknown code of the component Cache Manager Error Response Handler. The manipulation with an unknown input leads to a expired pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-825. The product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid. Impacted is availability. CVE summarizes:

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`.

The weakness was released 01/24/2024 as GHSA-j49p-553x-48rx. The advisory is available at github.com. This vulnerability is handled as CVE-2024-23638 since 01/19/2024. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 211386 (Oracle Linux 8 : squid (ELSA-2024-9644)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6 eliminates this vulnerability. Applying the patch 290ae202883ac28a48867079c2fb34c40efd382b is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (211386). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Firewall Software

Vendor

• Squid

Name

• Web Proxy

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5

License

• open-source

Website

• Vendor: http://www.squid-cache.org/

CPE 2.3info

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CPE 2.2info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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