#VU99355 Resource management error in Squid - CVE-2024-45802

Vulnerability identifier: #VU99355

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-2024-45802

CWE-ID: CWE-399

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 improper management of internal resources within the application when processing ESI response content. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Successful exploitation of the vulnerability requires that Squid is acting as reverse proxy where ESI feature has been enabled at build time.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Squid: 3.0.stable1 - 3.5.28, 4.0 - 4.17, 5.0 - 5.10, 6.0.1 - 6.9

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External links
https://github.com/squid-cache/squid/security/advisories/GHSA-f975-v7qw-q7hj

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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.