Squid is a caching proxy for the Web. Due to an expired pointer reference bug, Squid prior to version 6.6 is vulnerable to a Denial of Service attack against Cache Manager error responses. This problem allows a trusted client to perform Denial of Service when generating error pages for Client Manager reports. Squid older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. 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. As a workaround, prevent access to Cache Manager using Squid's main access control: `http_access deny manager`.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade squidUpgrade libecapUpgrade libecap-devel | Jul 29, 2024 | Jan 24, 2024 |
| Alpine Linux | — | Upgrade squid | Mar 21, 2024 | Jan 23, 2024 |
| Amazon Linux Ami 2 | — | Upgrade squid-migration-scriptUpgrade squid-debuginfoUpgrade squidUpgrade squid-sysvinit | Feb 8, 2024 | Jan 24, 2024 |
| Amazon_linux_2023 | — | Upgrade squidUpgrade squid-debugsourceUpgrade squid-debuginfo | Feb 17, 2025 | Jan 24, 2024 |
| Debian | — | Upgrade squid | Mar 11, 2024 | Jan 24, 2024 |
| Huawei Euleros 2_0_sp8 | — | Upgrade squid | Jul 23, 2024 | Jan 24, 2024 |
| Oracle_linux | — | Upgrade libecap-develUpgrade squidUpgrade libecap | Aug 16, 2024 | Jan 24, 2024 |
| Redhat_linux | — | Upgrade squidNo solution existsUpgrade libecapUpgrade libecap-debugsourceUpgrade libecap-develUpgrade libecap-debuginfoUpgrade squid-debugsourceUpgrade squid-debuginfo | Jul 26, 2024 | Jan 24, 2024 |
| Rocky_linux | — | Upgrade squidUpgrade squid-debuginfoUpgrade libecap-develUpgrade squid-debugsourceUpgrade libecapUpgrade libecap-debugsourceUpgrade libecap-debuginfo | Jul 29, 2024 | Jan 24, 2024 |
| Suse | — | Upgrade squid | Feb 2, 2024 | Jan 24, 2024 |
| Ubuntu | — | Upgrade squid | Apr 11, 2024 | Jan 24, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jan 23, 2024 |
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