Christoph Anton Mitterer discovered that maildrop, a mail delivery agent with filtering abilities, is prone to a privilege escalation issue that grants a user root group privileges. For the stable distribution , this problem has been fixed in version 2.0.4-3+lenny1. For the oldstable distribution , this problem has been fixed in version 2.0.2-11+etch1. For the testing distribution and the unstable distribution , this problem will be fixed soon. We recommend that you upgrade your maildrop packages.