The Ubuntu clamav-milter.init script in clamav-milter before 0.95.1+dfsg-1ubuntu1.2 in Ubuntu 9.04 sets the ownership of the current working directory to the clamav account, which might allow local users to bypass intended access restrictions via read or write operations involving this directory.
https://launchpad.net/bugs/365823
https://exchange.xforce.ibmcloud.com/vulnerabilities/50311
http://www.ubuntu.com/usn/USN-770-1