CVE-2017-18226

The Gentoo net-im/jabberd2 package through 2.6.1 sets the ownership of
/var/run/jabber to the jabber account, which might allow local users to
kill arbitrary processes by leveraging access to this account for PID file
modification before a root script executes a “kill -TERM cat /var/run/jabber/filename.pid” command.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=902783&gt;