Ubuntu Security Notice USN-787-1 – The apache2 packages have been patched to address flaws in apr-util, mod_proxy_ajp, configuration issues, and more.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/78303/USN-787-1.txt
Source: https://packetstormsecurity.com/files/78303/Ubuntu-Security-Notice-787-1.html