Ubuntu Security Notice USN-2593-1
4th May, 2015
dnsmasq vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu (vivid)
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
Dnsmasq could be made to crash or expose sensitive information if it
received specially crafted network traffic.
Software description
- dnsmasq
– Small caching DNS proxy and DHCP/TFTP server
Details
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
information.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu (vivid):
-
dnsmasq-base
2.72-3ubuntu0.1
- Ubuntu 14.10:
-
dnsmasq-base
2.71-1ubuntu0.1
- Ubuntu 14.04 LTS:
-
dnsmasq-base
2.68-1ubuntu0.1
- Ubuntu 12.04 LTS:
-
dnsmasq
2.59-4ubuntu0.2
-
dnsmasq-utils
2.59-4ubuntu0.2
-
dnsmasq-base
2.59-4ubuntu0.2
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.