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=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2024.2500 USN-6728-3: Squid vulnerability 24 April 2024 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Squid Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2023-5824 CVE-2024-25617 CVE-2024-25111 CVE-2024-23638 CVE-2023-49288 Original Bulletin: https://ubuntu.com/security/notices/USN-6728-3 Comment: CVSS (Max): 8.6 CVE-2024-25617 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H) CVSS Source: Ubuntu, [Red Hat] Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- USN-6728-3: Squid vulnerability 23 April 2024 Squid could be made to crash if it received specially crafted network traffic. Releases o Ubuntu 20.04 LTS Packages o squid - Web proxy cache server Details USN-6728-1 fixed vulnerabilities in Squid. The fix for CVE-2023-5824 caused Squid to crash in certain environments on Ubuntu 20.04 LTS and was disabled in USN-6728-2. The problematic fix for CVE-2023-5824 has now been corrected and reinstated in this update. We apologize for the inconvenience. Original advisory details: Joshua Rogers discovered that Squid incorrectly handled collapsed forwarding. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. ( CVE-2023-49288 ) Joshua Rogers discovered that Squid incorrectly handled certain structural elements. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. ( CVE-2023-5824 ) Joshua Rogers discovered that Squid incorrectly handled Cache Manager error responses. A remote trusted client can possibly use this issue to cause Squid to crash, resulting in a denial of service. ( CVE-2024-23638 ) Joshua Rogers discovered that Squid incorrectly handled the HTTP Chunked decoder. A remote attacker could possibly use this issue to cause Squid to stop responding, resulting in a denial of service. ( CVE-2024-25111 ) Joshua Rogers discovered that Squid incorrectly handled HTTP header parsing. A remote trusted client can possibly use this issue to cause Squid to crash, resulting in a denial of service. ( CVE-2024-25617 ) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 o squid - 4.10-1ubuntu1.12 In general, a standard system update will make all the necessary changes. References o CVE-2023-49288 o CVE-2023-5824 o https://launchpad.net/bugs/2060880 Related notices o USN-6728-1 : squid-cgi, squid-openssl, squidclient, squid-common, squid-purge, squid - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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