The save_log_local function in Fully Automatic Installation (FAI) 2.10.1, and possibly 3.1.2, when verbose mode is enabled, stores the root password hash in /var/log/fai/current/fai.log, whose file permissions allow it to be copied to other hosts when fai-savelog is called and allows attackers to obtain the hash.
Exploitability
AV:LAC:MAu:NImpact
C:PI:NA:N1.9/AV:L/AC:M/Au:N/C:P/I:N/A:N