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Ubuntu Security Notice USN-3395-1
August 17, 2017
c-ares vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 17.04
– Ubuntu 16.04 LTS
– Ubuntu 14.04 LTS
Summary:
c-ares could be made to crash if it received specially crafted network
traffic.
Software Description:
– 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.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 17.04:
libc-ares2 1.12.0-1ubuntu0.1
Ubuntu 16.04 LTS:
libc-ares2 1.10.0-3ubuntu0.2
Ubuntu 14.04 LTS:
libc-ares2 1.10.0-2ubuntu0.2
In general, a standard system update will make all the necessary changes.
References:
https://www.ubuntu.com/usn/usn-3395-1
CVE-2017-1000381
Package Information:
https://launchpad.net/ubuntu/+source/c-ares/1.12.0-1ubuntu0.1
https://launchpad.net/ubuntu/+source/c-ares/1.10.0-3ubuntu0.2
https://launchpad.net/ubuntu/+source/c-ares/1.10.0-2ubuntu0.2
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