Ubuntu Security Notice USN-2484-1
26th January, 2015
unbound vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 14.10
- Ubuntu 14.04 LTS
Summary
Unbound could be made to consume resources if it received specially crafted
network traffic.
Software description
- unbound
– validating, recursive, caching DNS resolver
Details
Florian Maury discovered that Unbound incorrectly handled delegation. A
remote attacker could possibly use this issue to cause Unbound to consume
resources, resulting in a denial of service.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 14.10:
-
libunbound2
1.4.22-1ubuntu4.14.10.1
-
unbound
1.4.22-1ubuntu4.14.10.1
- Ubuntu 14.04 LTS:
-
libunbound2
1.4.22-1ubuntu4.14.04.1
-
unbound
1.4.22-1ubuntu4.14.04.1
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.