USN-3009-1: Dnsmasq vulnerability
Ubuntu Security Notice USN-3009-1
20th June, 2016
dnsmasq vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 15.10
Summary
Dnsmasq could be made to crash if it received specially crafted network
traffic.
Software description
- dnsmasq
– Small caching DNS proxy and DHCP/TFTP server
Details
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 version:
- Ubuntu 16.04 LTS:
-
dnsmasq
2.75-1ubuntu0.16.04.1
-
dnsmasq-utils
2.75-1ubuntu0.16.04.1
-
dnsmasq-base
2.75-1ubuntu0.16.04.1
- Ubuntu 15.10:
-
dnsmasq
2.75-1ubuntu0.15.10.1
-
dnsmasq-utils
2.75-1ubuntu0.15.10.1
-
dnsmasq-base
2.75-1ubuntu0.15.10.1
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.
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