Ubuntu Security Notice 402-1 – A flaw was discovered in Avahi’s handling of compressed DNS packets. If a specially crafted reply were received over the network, the Avahi daemon would go into an infinite loop, causing a denial of service.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/53503/USN-402-1.txt
Source: https://packetstormsecurity.com/files/53503/Ubuntu-Security-Notice-402-1.html