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Ubuntu Security Notice USN-3009-1
June 20, 2016
dnsmasq vulnerability
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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 versions:
Ubuntu 16.04 LTS:
dnsmasq 2.75-1ubuntu0.16.04.1
dnsmasq-base 2.75-1ubuntu0.16.04.1
dnsmasq-utils 2.75-1ubuntu0.16.04.1
Ubuntu 15.10:
dnsmasq 2.75-1ubuntu0.15.10.1
dnsmasq-base 2.75-1ubuntu0.15.10.1
dnsmasq-utils 2.75-1ubuntu0.15.10.1
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-3009-1
CVE-2015-8899
Package Information:
https://launchpad.net/ubuntu/+source/dnsmasq/2.75-1ubuntu0.16.04.1
https://launchpad.net/ubuntu/+source/dnsmasq/2.75-1ubuntu0.15.10.1
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