Squid 2.5, when processing the configuration file, parses empty Access Control Lists (ACLs), including proxy_auth ACLs without defined auth schemes, in a way that effectively removes arguments, which could allow remote attackers to bypass intended ACLs if the administrator ignores the parser warnings.
CVSS Details
- CVSS 3.1 Base Score: 9.1
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade squid | Jul 30, 2024 | May 2, 2005 |
| Freebsd | — | Upgrade squid | Dec 10, 2025 | Dec 23, 2004 |
| Gentoo Linux | — | Upgrade net-proxy/squid. | Oct 30, 2017 | May 2, 2005 |
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