Screen: root exploit 4.5.0
Commit f86a374 ("screen.c: adding permissions check for the logfile name", 2015-11-04)
The check opens the logfile with full root privileges. This allows us to
truncate any file or create a root-owned file with any contents in any
directory and can be easily exploited to full root access in several ways.
screen 4.4.0 to and inclusive 4.5.0