USN-3395-1: c-ares vulnerability

Publication date

17 August 2017

Overview

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


Packages

  • c-ares - library for asynchronous name resolution

Details

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.

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

In general, a standard system update will 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
17.04 zesty libc-ares2 –  1.12.0-1ubuntu0.1
16.04 xenial libc-ares2 –  1.10.0-3ubuntu0.2
14.04 trusty libc-ares2 –  1.10.0-2ubuntu0.2

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