========================================================================== Ubuntu Security Notice USN-7689-1 August 11, 2025
dnsmasq vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
Summary:
Dnsmasq could be made to crash if it received specially crafted network
traffic.
Software Description:
- dnsmasq: Small caching DNS proxy and DHCP/TFTP server
Details:
Xu Mingjie discovered that Dnsmasq did not correctly handle certain memory
operations. A remote attacker could possibly use this issue to cause a
denial of service.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 LTS
dnsmasq 2.68-1ubuntu0.2+esm3
Available with Ubuntu Pro
dnsmasq-base 2.68-1ubuntu0.2+esm3
Available with Ubuntu Pro
dnsmasq-utils 2.68-1ubuntu0.2+esm3
Available with Ubuntu Pro
After a standard system update you need to restart dnsmasq to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-7689-1
CVE-2019-14834
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