slim -- local disclosure of X authority magic cookie

Secunia reports:

A security issue has been reported in SLiM, which can be
exploited by malicious, local users to disclose sensitive
information.
The security issue is caused due to the application
generating the X authority file by passing the X authority
cookie via the command line to “xauth”. This can be exploited
to disclose the X authority cookie by consulting the process
list and e.g. gain access the user’s display.