Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.
CVSS Details
- CVSS 3.1 Base Score: 8.6
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libecap-develUpgrade squidUpgrade libecap | Apr 15, 2024 | Dec 14, 2023 |
| Alpine Linux | — | Upgrade squid | Mar 26, 2024 | Dec 14, 2023 |
| Amazon Linux Ami 2 | — | Upgrade squid-sysvinitUpgrade squid-debuginfoUpgrade squid-migration-scriptUpgrade squid | Feb 8, 2024 | Dec 14, 2023 |
| Amazon_linux | — | Upgrade squid | Feb 6, 2024 | Dec 14, 2023 |
| Amazon_linux_2023 | — | Upgrade squid-debuginfoUpgrade squidUpgrade squid-debugsource | Feb 17, 2025 | Dec 14, 2023 |
| Centos_linux | — | Upgrade squid-debuginfoUpgrade squid-migration-scriptUpgrade squidUpgrade squid-sysvinit | Apr 12, 2024 | Dec 14, 2023 |
| Debian | — | Upgrade squid | Jan 15, 2024 | Dec 14, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade squid | Mar 13, 2024 | Dec 14, 2023 |
| Oracle_linux | — | Upgrade squid-migration-scriptUpgrade squidUpgrade libecap-develUpgrade squid-sysvinitUpgrade libecap | Mar 21, 2024 | Dec 14, 2023 |
| Redhat_linux | — | Upgrade squid-migration-scriptUpgrade libecapUpgrade squid-debuginfoUpgrade libecap-debugsourceUpgrade squidUpgrade squid-sysvinitUpgrade libecap-develUpgrade libecap-debuginfoNo solution existsUpgrade squid-debugsource | Jan 26, 2024 | Dec 14, 2023 |
| Rocky_linux | — | Upgrade libecap-debuginfoUpgrade libecap-debugsourceUpgrade libecap-develUpgrade libecap | May 8, 2025 | Dec 14, 2023 |
| Suse | — | Upgrade squid | Feb 2, 2024 | Dec 14, 2023 |
| Ubuntu | — | Upgrade squid3 (Ubuntu Pro)Upgrade squid (Ubuntu Pro)Upgrade squid | Jan 24, 2024 | Dec 14, 2023 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Dec 14, 2023 |
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