Description of problem:

Recent security update creates temporary files for 'ppmfade'
in a directory generated like this:

my $tmpdir = tempdir("ppmfade.XXXXXX", CLEANUP => 1);

This attempts to write to the current working directory
which may be problematic if that happens to be, for example,
on a read-only file system.  Say, when processing pictures
on a CD.  Instead the following should be used:

my $tmpdir = tempdir("ppmfade.XXXXXX", CLEANUP => 1, TMPDIR => 1);

as then $TMPDIR settings will be honoured and if not set then
$tmpdir will be created in /tmp/.

Version-Release number of selected component (if applicable):
netpbm-9.24-12.1.1 but the same applies to an updated for RH9
and likely for other versions as well.