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An issue was discovered in Squid 4.x before 4.15 and 5.x before 5.0.6. If a remote server sends a certain response header over HTTP or HTTPS, there is a denial of service. This header can plausibly occur in benign network traffic.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libecap-develUpgrade squidUpgrade libecap | May 13, 2022 | May 27, 2021 |
| Alpine Linux | — | Upgrade squid | Mar 26, 2024 | May 27, 2021 |
| Amazon Linux Ami 2 | — | Upgrade squidUpgrade squid-debuginfo | Sep 28, 2023 | May 27, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | May 27, 2021 |
| Centos_linux | — | Upgrade squid-debugsourceUpgrade squid-debuginfoUpgrade squidUpgrade libecap-debugsourceUpgrade libecap-debuginfoUpgrade libecap-develUpgrade libecap | Nov 10, 2021 | May 27, 2021 |
| Debian | — | Upgrade squid | Jun 3, 2021 | May 27, 2021 |
| Gentoo Linux | — | Upgrade net-proxy/squid. | May 28, 2021 | May 26, 2021 |
| Huawei Euleros 2_0_sp5 | — | Upgrade squid | Sep 29, 2021 | May 27, 2021 |
| Huawei Euleros 2_0_sp8 | — | Upgrade squid | Aug 10, 2021 | May 27, 2021 |
| Oracle Solaris | — | Upgrade web/proxy/squid to version 4.15-11.4.39.0.1.107.0 on Solaris 11.4 | Nov 17, 2021 | May 27, 2021 |
| Oracle_linux | — | Upgrade libecapUpgrade libecap-develUpgrade squid | Nov 17, 2021 | May 10, 2021 |
| Redhat_linux | — | Upgrade libecap-debuginfoUpgrade libecapUpgrade squidUpgrade squid-debuginfoUpgrade libecap-develUpgrade libecap-debugsourceUpgrade squid-debugsource | Nov 10, 2021 | May 27, 2021 |
| Rocky_linux | — | Upgrade libecap-develUpgrade libecap-debugsourceUpgrade squid-debuginfoUpgrade libecap-debuginfoUpgrade libecapUpgrade squidUpgrade squid-debugsource | Mar 12, 2024 | May 27, 2021 |
| Suse | — | Upgrade squid | Jun 3, 2021 | May 27, 2021 |
| Ubuntu | — | Upgrade squid | Jun 4, 2021 | May 27, 2021 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | May 27, 2021 |
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