The remote host is missing updates announced in advisory CLSA-2006:1057.
This announcement fixes a privilege escalation vulnerability noticed by Tavis Ormandy. Sudo did not clear the SHELLOPTS and PS4 environment variables before executing a bash script on behalf of another user, which could allow local users to gain privileges.
Solution: The apt tool can be used to perform RPM package upgrades by running 'apt-get update' followed by 'apt-get upgrade'