>>401>>402
ならこの辺自分で読め

https://blog.invisiblethings.org/2011/04/23/linux-security-circus-on-gui-isolation.html
https://blog.maleadt.net/2015/02/25/sudo-escalation/
http://www.halfdog.net/Security/2012/TtyPushbackPrivilegeEscalation/
http://jo.fabrizio.free.fr/blog/post_00003/index.php