#VU82907 Input validation error in Squid - CVE-2023-46848

Vulnerability identifier: #VU82907

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-46848

CWE-ID: CWE-20

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 insufficient validation of user-supplied input. A remote attacker can send ftp:// URLs in HTTP Request messages or construct ftp:// URLs from FTP Native input and crash the proxy server.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Squid: 5.0.3 - 5.9, 6.0.1 - 6.3

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External links
https://github.com/squid-cache/squid/security/advisories/GHSA-2g3c-pg7q-g59w

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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.