Security updates for Thursday

Debian has updated libmodplug (two code execution vulnerabilities).

Fedora has updated glibc (F18: privilege escalation), openstack-nova (F19: multiple vulnerabilities), and python-virtualenv (F19; F18: code execution).

Mandriva has updated roundcubemail (BS1, ES5: cross-site scripting).

Red Hat has updated haproxy (OSE: denial of service) and rubygems (OSE: two vulnerabilities).