The problem can be corrected by upgrading the affected package to
version 1:6.3-025+1ubuntu2.3 (for Ubuntu 4.10), or
1:6.3-046+1ubuntu7.1 (for Ubuntu 5.04). In general, a standard system
upgrade is sufficient to effect the necessary changes.
Georgi Guninski discovered that it was possible to construct Vim
modelines that execute arbitrary shell commands by wrapping them in
glob() or expand() function calls. If an attacker tricked an user to
open a file with a specially crafted modeline, he could exploit this
to execute arbitrary commands with the user's privileges.