A security issue affects the following Ubuntu releases:
Ubuntu 8.04 LTS Ubuntu 8.10 Ubuntu 9.04
This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.
The problem can be corrected by upgrading your system to the following package versions:
Ubuntu 8.04 LTS: apport 0.108.4
Ubuntu 8.10: apport 0.119.2
Ubuntu 9.04: apport 1.0-0ubuntu5.2
In general, a standard system upgrade is sufficient to effect the necessary changes.
Details follow:
Stephane Chazelas discovered that Apport did not safely remove files from its crash report directory. If Apport had been enabled at some point, a local attacker could remove arbitrary files from the system.