bb-hist.sh, bb-histlog.sh, bb-hostsvc.sh, bb-rep.sh, bb-replog.sh, and bb-ack.sh in Big Brother (BB) before 1.5d3 allows remote attackers to determine the existence of files and user ID's by specifying the target file in the HISTFILE parameter.
bbd server in Big Brother System and Network Monitor before 1.5c2 allows remote attackers to execute arbitrary commands via the "&" shell metacharacter.