squid: Squid is a caching proxy for the Web
CVE-2024-23638 is fixed in 10 products on 1 platform, first by DEBIAN-CVE-2024-23638, released January 24, 2024. It is not reported as exploited. Patch Radar priority: Routine.
Squid is a caching proxy for the Web. Due to an expired pointer referencebug, Squid prior to version 6.6 is vulnerable to a Denial of Service attackagainst Cache Manager error responses. This problem allows a trusted clientto perform Denial of Service when generating error pages for Client Managerreports. Squid older than 5.0.5 have not been tested and should be assumedto be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. AllSquid-6.x up to and including 6.5 are vulnerable. This bug is fixed bySquid version 6.6. In addition, patches addressing this problem for thestable 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`.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libecap · RHEL 8 | 0:1.0.1-2.module+el8.9.0+19703+a1da7223 | RHSA-2024:9644 | Nov 14, 2024 |
| libecap · almalinux 8 | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2024:9644 | Nov 14, 2024 |
| libecap · ol 8 | 0:1.0.1-2.module+el8.9.0+90083+f7556140 | ELSA-2024-9644 | Nov 15, 2024 |
| libecap · rocky 8 | 0:1.0.1-2.module+el8.9.0+1437+df5ea8f0 | RLSA-2024:9644 | Nov 19, 2024 |
| libecap-devel · RHEL 8 | 0:1.0.1-2.module+el8.9.0+19703+a1da7223 | RHSA-2024:9644 | Nov 14, 2024 |
| libecap-devel · almalinux 8 | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2024:9644 | Nov 14, 2024 |
| libecap-devel · ol 8 | 0:1.0.1-2.module+el8.9.0+90083+f7556140 | ELSA-2024-9644 | Nov 15, 2024 |
| squid · Debian 12.15 (bookworm) | 5.7-2+deb12u1 | DEBIAN-CVE-2024-23638 | Jan 24, 2024 |
| squid · Debian 13.5 (trixie) | 6.6-1 | DEBIAN-CVE-2024-23638 | Jan 24, 2024 |
| squid · Debian 14 | 6.6-1 | DEBIAN-CVE-2024-23638 | Jan 24, 2024 |
| squid · RHEL 8 | 7:4.15-10.module+el8.10.0+22489+b920747d.3 | RHSA-2024:9644 | Nov 14, 2024 |
| squid · RHEL 9 | 7:5.5-13.el9_4 | RHSA-2024:4861 | Jul 25, 2024 |
| squid · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.10 | squid 4.10-1ubuntu1.10 | Mar 6, 2024 |
| squid · Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | squid 5.7-0ubuntu0.22.04.4 | Aug 1, 2025 |
| squid · Ubuntu 24.10 (oracular) | 6.6-1ubuntu1 | squid 6.6-1ubuntu1 | Jan 16, 2026 |
| squid · Ubuntu 25.04 (plucky) | 6.6-1ubuntu1 | squid 6.6-1ubuntu1 | Jan 16, 2026 |
| squid · almalinux 8 | 7:4.15-10.module_el8.10.0+3916+ed00a4a0.3 | ALSA-2024:9644 | Nov 14, 2024 |
| squid · almalinux 9 | 7:5.5-13.el9_4 | ALSA-2024:4861 | Jul 25, 2024 |
| squid · amzn 2023 | 7:6.6-1.amzn2023.0.3 | ALAS2023-2024-578 | Mar 27, 2024 |
| squid · ol 8 | 7:4.15-10.module+el8.10.0+90442+8ef3f586.3 | ELSA-2024-9644 | Nov 15, 2024 |
| squid · ol 9 | 7:5.5-13.el9_4 | ELSA-2024-4861 | Jul 25, 2024 |
| squid · rocky 8 | 7:4.15-10.module+el8.10.0+1758+80ba9f4b | RLSA-2024:9644 | Nov 19, 2024 |
| squid · rocky 9 | 7:5.5-13.el9_4 | RLSA-2024:4861 | Jul 26, 2024 |
| squid-cgi · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.10 | squid-cgi 4.10-1ubuntu1.10 | Mar 6, 2024 |
| squid-cgi · Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | squid-cgi 5.7-0ubuntu0.22.04.4 | Aug 1, 2025 |
| squid-cgi · Ubuntu 24.10 (oracular) | 6.6-1ubuntu1 | squid-cgi 6.6-1ubuntu1 | Jan 16, 2026 |
| squid-cgi · Ubuntu 25.04 (plucky) | 6.6-1ubuntu1 | squid-cgi 6.6-1ubuntu1 | Jan 16, 2026 |
| squid-common · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.10 | squid-common 4.10-1ubuntu1.10 | Mar 6, 2024 |
| squid-common · Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | squid-common 5.7-0ubuntu0.22.04.4 | Aug 1, 2025 |
| squid-common · Ubuntu 24.10 (oracular) | 6.6-1ubuntu1 | squid-common 6.6-1ubuntu1 | Jan 16, 2026 |
| squid-common · Ubuntu 25.04 (plucky) | 6.6-1ubuntu1 | squid-common 6.6-1ubuntu1 | Jan 16, 2026 |
| squid-debuginfo · amzn 2023 | 7:6.6-1.amzn2023.0.3 | ALAS2023-2024-578 | Mar 27, 2024 |
| squid-debugsource · amzn 2023 | 7:6.6-1.amzn2023.0.3 | ALAS2023-2024-578 | Mar 27, 2024 |
| squid-openssl · Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | squid-openssl 5.7-0ubuntu0.22.04.4 | Aug 1, 2025 |
| squid-openssl · Ubuntu 24.10 (oracular) | 6.6-1ubuntu1 | squid-openssl 6.6-1ubuntu1 | Jan 16, 2026 |
| squid-openssl · Ubuntu 25.04 (plucky) | 6.6-1ubuntu1 | squid-openssl 6.6-1ubuntu1 | Jan 16, 2026 |
| squid-purge · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.10 | squid-purge 4.10-1ubuntu1.10 | Mar 6, 2024 |
| squid-purge · Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | squid-purge 5.7-0ubuntu0.22.04.4 | Aug 1, 2025 |
| squid-purge · Ubuntu 24.10 (oracular) | 6.6-1ubuntu1 | squid-purge 6.6-1ubuntu1 | Jan 16, 2026 |
| squid-purge · Ubuntu 25.04 (plucky) | 6.6-1ubuntu1 | squid-purge 6.6-1ubuntu1 | Jan 16, 2026 |
| squidclient · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.10 | squidclient 4.10-1ubuntu1.10 | Mar 6, 2024 |
| squidclient · Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | squidclient 5.7-0ubuntu0.22.04.4 | Aug 1, 2025 |
| squidclient · Ubuntu 24.10 (oracular) | 6.6-1ubuntu1 | squidclient 6.6-1ubuntu1 | Jan 16, 2026 |
| squidclient · Ubuntu 25.04 (plucky) | 6.6-1ubuntu1 | squidclient 6.6-1ubuntu1 | Jan 16, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.