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Ubuntu Security Notice USN-3395-1

Ubuntu Security Notice USN-3395-1
Posted Aug 17, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3395-1 - 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.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2017-1000381
MD5 | d2cce8e48df03fe7df069e3d6ead86af

Ubuntu Security Notice USN-3395-1

Change Mirror Download
==========================================================================
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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