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Squid before 3.5.6 does not properly handle CONNECT method peer responses when configured with cache_peer, which allows remote attackers to bypass intended restrictions and gain access to a backend proxy via a CONNECT request.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade squid | Aug 30, 2017 | Sep 28, 2015 |
| Debian | — | Upgrade squid3Upgrade squid | Jul 30, 2024 | Sep 28, 2015 |
| Freebsd | — | Upgrade squid | Dec 10, 2025 | Jul 6, 2015 |
| Oracle Solaris | — | Upgrade entire/ to version 11.4-11.4.0.0.1.15.0 on Solaris 11.4 | Oct 19, 2018 | Sep 28, 2015 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jul 6, 2015 |
| Suse | — | Upgrade squid3Upgrade squid | Aug 26, 2016 | Sep 28, 2015 |
| Ubuntu | — | Upgrade squid3 | Nov 19, 2024 | Sep 28, 2015 |
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