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USN-3395-1: c-ares vulnerability

17 August 2017

c-ares could be made to crash if it received specially crafted network traffic.



  • c-ares - library for asynchronous name resolution


It was discovered that c-ares incorrectly handled certain NAPTR responses.
A remote attacker could possibly use this issue to cause applications using
c-ares 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 17.04
Ubuntu 16.04
Ubuntu 14.04

In general, a standard system update will make all the necessary changes.