The winbindd daemon in Samba 3.0.21 to 3.0.21c writes the machine trust account password in cleartext in log files, which allows local users to obtain the password and spoof the server in the domain.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25575
http://www.vupen.com/english/advisories/2006/1179
http://www.trustix.org/errata/2006/0018
http://www.securityfocus.com/bid/17314
http://www.securityfocus.com/archive/1/429370/100/0/threaded
http://www.redhat.com/archives/fedora-announce-list/2006-March/msg00114.html
http://us1.samba.org/samba/security/CAN-2006-1059.html
http://securitytracker.com/id?1015850
http://secunia.com/advisories/19539