gtkdiskfree: Insecure temporary file creation

Background

gtkdiskfree is a GTK-based GUI to show free disk space.

Description

Eric Romang discovered that gtkdiskfree insecurely creates a predictable temporary file to handle command output.

Impact

A local attacker could create a symbolic link in the temporary files directory, pointing to a valid file somewhere on the filesystem. When gtkdiskfree is executed, this would result in the file being overwritten with the rights of the user running the application.

Workaround

There is no known workaround at this time.

Resolution

All gtkdiskfree users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=app-admin/gtkdiskfree-1.9.3-r1"