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 | alma-upgrade-libecapalma-upgrade-libecap-develalma-upgrade-squid | Jul 29, 2024 | Jan 24, 2024 | |
| Alpine Linux | alpine-linux-upgrade-squid | Mar 21, 2024 | Jan 23, 2024 | |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-squidamazon-linux-ami-2-upgrade-squid-debuginfoamazon-linux-ami-2-upgrade-squid-migration-scriptamazon-linux-ami-2-upgrade-squid-sysvinit | Feb 8, 2024 | Jan 24, 2024 | |
| Amazon_linux_2023 | amazon-linux-2023-upgrade-squidamazon-linux-2023-upgrade-squid-debuginfoamazon-linux-2023-upgrade-squid-debugsource | Feb 17, 2025 | Jan 24, 2024 | |
| Debian | debian-upgrade-squid | Mar 11, 2024 | Jan 24, 2024 | |
| Huawei Euleros 2_0_sp8 | huawei-euleros-2_0_sp8-upgrade-squid | Jul 23, 2024 | Jan 24, 2024 | |
| Oracle_linux | oracle-linux-upgrade-libecaporacle-linux-upgrade-libecap-develoracle-linux-upgrade-squid | Aug 16, 2024 | Jan 24, 2024 | |
| Redhat_linux | redhat-upgrade-libecapredhat-upgrade-libecap-debuginforedhat-upgrade-libecap-debugsourceredhat-upgrade-libecap-develredhat-upgrade-squidredhat-upgrade-squid-debuginforedhat-upgrade-squid-debugsource | Jul 26, 2024 | Jan 24, 2024 | |
| Rocky_linux | rocky-upgrade-libecaprocky-upgrade-libecap-debuginforocky-upgrade-libecap-debugsourcerocky-upgrade-libecap-develrocky-upgrade-squidrocky-upgrade-squid-debuginforocky-upgrade-squid-debugsource | Jul 29, 2024 | Jan 24, 2024 | |
| Suse | — | suse-upgrade-squid | Feb 2, 2024 | Jan 24, 2024 |
| Ubuntu | ubuntu-upgrade-squid | Apr 11, 2024 | Jan 24, 2024 | |
| Vmware Photon_os | vmware-photon_os_update_tdnf | Jan 20, 2025 | Jan 23, 2024 |
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