USN-3395-1: c-ares vulnerability
Ubuntu Security Notice USN-3395-1
17th August, 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 version:
- 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
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-3395-1: c-ares vulnerability
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