USN-3143-1: c-ares vulnerability

Ubuntu Security Notice USN-3143-1

30th November, 2016

c-ares vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 16.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

c-ares could be made to crash or run programs if it processed a specially crafted hostname.

Software description

• c-ares - library for asynchronous name resolves

Details

Gzob Qq discovered that c-ares incorrectly handled certain hostnames. A
remote attacker could use this issue to cause applications using c-ares to
crash, resulting in a denial of service, or possibly execute arbitrary
code.

Update instructions

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

Ubuntu 16.10:

libc-ares2 1.11.0-1ubuntu0.1

Ubuntu 16.04 LTS:

libc-ares2 1.10.0-3ubuntu0.1

Ubuntu 14.04 LTS:

libc-ares2 1.10.0-2ubuntu0.1

Ubuntu 12.04 LTS:

libc-ares2 1.7.5-1ubuntu0.1

To update your system, please follow these instructions: http://ift.tt/17VXqjU.

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

References

CVE-2016-5180

from Ubuntu Security Notices http://ift.tt/2fM2YEj