Tatsuya Kinoshita discovered that IM, which contains interface
commands and Perl libraries for E-mail and NetNews, creates temporary
files insecurely.
The impwagent program creates a temporary directory in an insecure
manner in /tmp using predictable directory names without checking
the return code of mkdir, so it's possible to seize a permission
of the temporary directory by local access as another user.
The immknmz program creates a temporary file in an insecure manner
in /tmp using a predictable filename, so an attacker with local
access can easily create and overwrite files as another user.
