Ubuntu Security Notice USN-687-1
4th December, 2008
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 8.10
- Ubuntu 8.04 LTS
- Ubuntu 7.10
- Ubuntu 6.06 LTS
It was discovered that nfs-utils did not properly enforce netgroup
restrictions when using TCP Wrappers. Remote attackers could bypass the
netgroup restrictions enabled by the administrator and possibly gain
access to sensitive information.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 8.10:
- nfs-kernel-server 1:1.1.2-4ubuntu1.1
- Ubuntu 8.04 LTS:
- nfs-kernel-server 1:1.1.2-2ubuntu2.2
- Ubuntu 7.10:
- nfs-kernel-server 1:1.1.1~git-20070709-3ubuntu1.1
- Ubuntu 6.06 LTS:
- nfs-kernel-server 1:1.0.7-3ubuntu2.1
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart nfs services to effect
the necessary changes.