# CVE-2023-5824: squid-purge: A flaw was found in Squid CVE-2023-5824 is fixed in 10 products on 1 platform, first by DEBIAN-CVE-2023-5824, released November 3, 2023. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2023-5824 - Priority: High - CVSS: 9.6 (Medium) - EPSS: 0.0328 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Nov 3, 2023 ## Description A flaw was found in Squid. The limits applied for validation of HTTPresponse headers are applied before caching. However, Squid may grow acached HTTP response header beyond the configured maximum size, causing astall or crash of the worker process when a large header is retrieved fromthe disk cache, resulting in a denial of service. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libecap RHEL 8 | 0:1.0.1-2.module+el8.9.0+19703+a1da7223 | [RHSA-2023:7668](https://patchblox.com/security/data/fix/linux/rhsa-2023-7668.md) | Dec 6, 2023 | | Linux | libecap almalinux 8 | 1.0.1-2.module_el8.6.0+2741+01592ae8 | [ALSA-2023:7668](https://patchblox.com/security/data/fix/linux/alsa-2023-7668.md) | Dec 6, 2023 | | Linux | libecap ol 8 | 0:1.0.1-2.module+el8.9.0+90083+f7556140 | [ELSA-2023-7668](https://patchblox.com/security/data/fix/linux/elsa-2023-7668.md) | Dec 11, 2023 | | Linux | libecap rocky 8 | 0:1.0.1-2.module+el8.9.0+1437+df5ea8f0 | [RLSA-2023:7668](https://patchblox.com/security/data/fix/linux/rlsa-2023-7668.md) | Dec 6, 2023 | | Linux | libecap-devel RHEL 8 | 0:1.0.1-2.module+el8.9.0+19703+a1da7223 | [RHSA-2023:7668](https://patchblox.com/security/data/fix/linux/rhsa-2023-7668.md) | Dec 6, 2023 | | Linux | libecap-devel almalinux 8 | 1.0.1-2.module_el8.6.0+2741+01592ae8 | [ALSA-2023:7668](https://patchblox.com/security/data/fix/linux/alsa-2023-7668.md) | Dec 6, 2023 | | Linux | libecap-devel ol 8 | 0:1.0.1-2.module+el8.9.0+90083+f7556140 | [ELSA-2023-7668](https://patchblox.com/security/data/fix/linux/elsa-2023-7668.md) | Dec 11, 2023 | | Linux | squid Debian 12.15 (bookworm) | 5.7-2+deb12u3 | [DSA-5982-1](https://patchblox.com/security/data/fix/linux/dsa-5982-1.md) | Aug 21, 2025 | | Linux | squid Debian 13.5 (trixie) | 6.5-1 | [DEBIAN-CVE-2023-5824](https://patchblox.com/security/data/fix/linux/debian-cve-2023-5824.md) | Nov 3, 2023 | | Linux | squid Debian 14 | 6.5-1 | [DEBIAN-CVE-2023-5824](https://patchblox.com/security/data/fix/linux/debian-cve-2023-5824.md) | Nov 3, 2023 | | Linux | squid RHEL 8 | 7:4.15-7.module+el8.9.0+20806+014d88aa.3 | [RHSA-2023:7668](https://patchblox.com/security/data/fix/linux/rhsa-2023-7668.md) | Dec 6, 2023 | | Linux | squid RHEL 9 | 7:5.5-6.el9_3.2 | [RHSA-2023:7465](https://patchblox.com/security/data/fix/linux/rhsa-2023-7465.md) | Nov 22, 2023 | | Linux | squid Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.12 | [squid 4.10-1ubuntu1.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-squid-4.10-1ubuntu1.12.md) | Aug 1, 2025 | | Linux | squid Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | [squid 5.7-0ubuntu0.22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-squid-5.7-0ubuntu0.22.04.4.md) | Aug 1, 2025 | | Linux | squid Ubuntu 24.04.5 LTS (noble) | 6.5-1ubuntu1 | [squid 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-squid-6.5-1ubuntu1.md) | Feb 14, 2024 | | Linux | squid Ubuntu 24.10 (oracular) | 6.5-1ubuntu1 | [squid 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-squid-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squid Ubuntu 25.04 (plucky) | 6.5-1ubuntu1 | [squid 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-squid-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squid almalinux 8 | 7:4.15-7.module_el8.9.0+3696+b881db49.3 | [ALSA-2023:7668](https://patchblox.com/security/data/fix/linux/alsa-2023-7668.md) | Dec 6, 2023 | | Linux | squid almalinux 9 | 7:5.5-6.el9_3.2 | [ALSA-2023:7465](https://patchblox.com/security/data/fix/linux/alsa-2023-7465.md) | Nov 22, 2023 | | Linux | squid amzn 2023 | 7:6.6-1.amzn2023.0.3 | [ALAS2023-2024-578](https://patchblox.com/security/data/fix/linux/alas2023-2024-578.md) | Mar 27, 2024 | | Linux | squid ol 8 | 7:4.15-7.module+el8.9.0+90100+fede0fa7.3 | [ELSA-2023-7668](https://patchblox.com/security/data/fix/linux/elsa-2023-7668.md) | Dec 11, 2023 | | Linux | squid ol 9 | 7:5.5-6.el9_3.2 | [ELSA-2023-7465](https://patchblox.com/security/data/fix/linux/elsa-2023-7465.md) | Nov 28, 2023 | | Linux | squid rocky 8 | 7:4.15-7.module+el8.9.0+1568+6d4fd5d4.1 | [RLSA-2023:7668](https://patchblox.com/security/data/fix/linux/rlsa-2023-7668.md) | Dec 6, 2023 | | Linux | squid-cgi Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.12 | [squid-cgi 4.10-1ubuntu1.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-squid-cgi-4.10-1ubuntu1.12.md) | Aug 1, 2025 | | Linux | squid-cgi Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | [squid-cgi 5.7-0ubuntu0.22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-squid-cgi-5.7-0ubuntu0.22.04.4.md) | Aug 1, 2025 | | Linux | squid-cgi Ubuntu 24.04.5 LTS (noble) | 6.5-1ubuntu1 | [squid-cgi 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-squid-cgi-6.5-1ubuntu1.md) | Feb 14, 2024 | | Linux | squid-cgi Ubuntu 24.10 (oracular) | 6.5-1ubuntu1 | [squid-cgi 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-squid-cgi-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squid-cgi Ubuntu 25.04 (plucky) | 6.5-1ubuntu1 | [squid-cgi 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-squid-cgi-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squid-common Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.12 | [squid-common 4.10-1ubuntu1.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-squid-common-4.10-1ubuntu1.12.md) | Aug 1, 2025 | | Linux | squid-common Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | [squid-common 5.7-0ubuntu0.22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-squid-common-5.7-0ubuntu0.22.04.4.md) | Aug 1, 2025 | | Linux | squid-common Ubuntu 24.04.5 LTS (noble) | 6.5-1ubuntu1 | [squid-common 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-squid-common-6.5-1ubuntu1.md) | Feb 14, 2024 | | Linux | squid-common Ubuntu 24.10 (oracular) | 6.5-1ubuntu1 | [squid-common 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-squid-common-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squid-common Ubuntu 25.04 (plucky) | 6.5-1ubuntu1 | [squid-common 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-squid-common-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squid-debuginfo amzn 2023 | 7:6.6-1.amzn2023.0.3 | [ALAS2023-2024-578](https://patchblox.com/security/data/fix/linux/alas2023-2024-578.md) | Mar 27, 2024 | | Linux | squid-debugsource amzn 2023 | 7:6.6-1.amzn2023.0.3 | [ALAS2023-2024-578](https://patchblox.com/security/data/fix/linux/alas2023-2024-578.md) | Mar 27, 2024 | | Linux | squid-openssl Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | [squid-openssl 5.7-0ubuntu0.22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-squid-openssl-5.7-0ubuntu0.22.04.4.md) | Aug 1, 2025 | | Linux | squid-openssl Ubuntu 24.04.5 LTS (noble) | 6.5-1ubuntu1 | [squid-openssl 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-squid-openssl-6.5-1ubuntu1.md) | Feb 14, 2024 | | Linux | squid-openssl Ubuntu 24.10 (oracular) | 6.5-1ubuntu1 | [squid-openssl 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-squid-openssl-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squid-openssl Ubuntu 25.04 (plucky) | 6.5-1ubuntu1 | [squid-openssl 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-squid-openssl-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squid-purge Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.12 | [squid-purge 4.10-1ubuntu1.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-squid-purge-4.10-1ubuntu1.12.md) | Aug 1, 2025 | | Linux | squid-purge Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | [squid-purge 5.7-0ubuntu0.22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-squid-purge-5.7-0ubuntu0.22.04.4.md) | Aug 1, 2025 | | Linux | squid-purge Ubuntu 24.04.5 LTS (noble) | 6.5-1ubuntu1 | [squid-purge 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-squid-purge-6.5-1ubuntu1.md) | Feb 14, 2024 | | Linux | squid-purge Ubuntu 24.10 (oracular) | 6.5-1ubuntu1 | [squid-purge 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-squid-purge-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squid-purge Ubuntu 25.04 (plucky) | 6.5-1ubuntu1 | [squid-purge 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-squid-purge-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squidclient Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.12 | [squidclient 4.10-1ubuntu1.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-squidclient-4.10-1ubuntu1.12.md) | Aug 1, 2025 | | Linux | squidclient Ubuntu 22.04.1 LTS (jammy) | 5.7-0ubuntu0.22.04.4 | [squidclient 5.7-0ubuntu0.22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-squidclient-5.7-0ubuntu0.22.04.4.md) | Aug 1, 2025 | | Linux | squidclient Ubuntu 24.04.5 LTS (noble) | 6.5-1ubuntu1 | [squidclient 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-squidclient-6.5-1ubuntu1.md) | Feb 14, 2024 | | Linux | squidclient Ubuntu 24.10 (oracular) | 6.5-1ubuntu1 | [squidclient 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-squidclient-6.5-1ubuntu1.md) | Jan 16, 2026 | | Linux | squidclient Ubuntu 25.04 (plucky) | 6.5-1ubuntu1 | [squidclient 6.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-squidclient-6.5-1ubuntu1.md) | Jan 16, 2026 | --- Data as of 2026-11-08T13:06:02Z UTC. 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