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USN-2593-1: Dnsmasq vulnerability

4 May 2015

Dnsmasq could be made to crash or expose sensitive information if it received specially crafted network traffic.



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


Nick Sampanis discovered that Dnsmasq incorrectly handled certain malformed
DNS requests. A remote attacker could use this issue to cause Dnsmasq to
crash, resulting in a denial of service, or possibly obtain sensitive

Update instructions

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

Ubuntu 15.04
Ubuntu 14.10
Ubuntu 14.04
Ubuntu 12.04

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