#VU85722 Expired pointer dereference in Squid - CVE-2024-23638

Vulnerability identifier: #VU85722

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-23638

CWE-ID: CWE-825

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Squid
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Squid-cache.org

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an expired pointer dereference in the Cache Manager when handling error responses. A remote attacker can perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Squid: 5.0 - 5.9, 6.0.1 - 6.5

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External links
https://github.com/squid-cache/squid/security/advisories/GHSA-j49p-553x-48rx
https://www.squid-cache.org/Versions/v5/SQUID-2023_11.patch
https://www.squid-cache.org/Versions/v6/SQUID-2023_11.patch

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.