Ubuntu 20.04 LTS: Critical Denial of Service Patch for Squid USN-7804-2
ubuntu
November 4, 2025
Squid could be made to crash if it received specially crafted network traffic.
Summary
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Squid could be made to crash if it received specially crafted network traffic. Software Description: - squid: Web proxy cache server - squid3: Web proxy cache server Details: USN-7804-1 fixed a vulnerability in Squid. This update provides the corresponding update for Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Original advisory details: It was discovered that Squid incorrectly handled certain long SNMP OIDs. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service.
Topics Covered
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS squid 4.10-1ubuntu1.13+esm2 Available with Ubuntu Pro Ubuntu 18.04 LTS squid 3.5.27-1ubuntu1.14+esm5 Available with Ubuntu Pro squid3 3.5.27-1ubuntu1.14+esm5 Available with Ubuntu Pro Ubuntu 16.04 LTS squid 3.5.12-1ubuntu7.16+esm6 Available with Ubuntu Pro squid3 3.5.12-1ubuntu7.16+esm6 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.
References
https://ubuntu.com/security/notices/USN-7804-2
https://ubuntu.com/security/notices/USN-7804-1
CVE-2025-59362
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Ubuntu Security Notice USN-7804-2
Topics Covered
Package Information
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