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USN-3009-1: Dnsmasq vulnerability

20 June 2016

Dnsmasq could be made to crash if it received specially crafted network traffic.



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


Edwin Török discovered that Dnsmasq incorrectly handled certain CNAME
responses. A remote attacker could use this issue to cause Dnsmasq to
crash, resulting in a denial of service.

Update instructions

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

Ubuntu 16.04
Ubuntu 15.10

After a standard system update you need to reboot your computer to make
all the necessary changes.