foomatic-filters - security update

Adam Chester discovered that there was an injection vulnerability in
foomatic-filters which is used by printer spoolers to convert
incoming PostScript data into the printer’s native format. This
could lead to the execution of arbitrary commands.

The patch applied in DLA 365-1 prevented usage of (unescaped) backticks
and this update complements the previous update by doing the same for
semi-colons.

For Debian 6 Squeeze, this issue has been fixed in foomatic-filters
version 4.0.5-6+squeeze2+deb6u12.

(Thanks to Yann Soubeyrand who prepared the updated Debian package)