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USN-5408-1: Dnsmasq vulnerability

10 May 2022

Dnsmasq could be made to execute arbitrary code or expose sensitive information if it received a specially crafted input.



  • dnsmasq - Small caching DNS proxy and DHCP/TFTP server


Petr Menšík and Richard Johnson discovered that Dnsmasq incorrectly handled
certain inputs. An attacker could possibly use this issue to execute
arbitrary code or expose sensitive information.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 22.04
Ubuntu 21.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

In general, a standard system update will make all the necessary changes.