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:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
Source: USN-3143-1: c-ares vulnerability
