1. Ubuntu Security Notices
  2. USN-3009-1

USN-3009-1: Dnsmasq vulnerability

Publication date

20 June 2016

Overview

Dnsmasq could be made to crash if it received specially crafted network traffic.

Releases

Packages

  • 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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.04 xenial dnsmasq –  2.75-1ubuntu0.16.04.1
dnsmasq-base –  2.75-1ubuntu0.16.04.1
dnsmasq-utils –  2.75-1ubuntu0.16.04.1
15.10 wily dnsmasq –  2.75-1ubuntu0.15.10.1
dnsmasq-base –  2.75-1ubuntu0.15.10.1
dnsmasq-utils –  2.75-1ubuntu0.15.10.1

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References

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