According to Debian advisory DSA 500-1:
Tatsuya Kinoshita discovered a vulnerability in flim, an emacs library
for working with internet messages, where temporary files were created
without taking appropriate precautions. This vulnerability could
potentially be exploited by a local user to overwrite files with the
privileges of the user running emacs.
Issue is public but low risk.
CAN-2004-0422 Affects: 2.1AS 2.1AW 2.1ES 2.1WS
An errata has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.