A new Debian Linux update has been published: ELA-567-1 apache2 security update
An apache2 security update has been released for Debian GNU/Linux 8 Extended LTS to address two vulnerabilities. This package appears to be broken. Apache will fail to restart with "Cannot load /usr/lib/apache2/modules/mod_proxy.so into server: /usr/lib/apache2/modules/mod_proxy.so: undefined symbol: ap_proxy_de_socketfy" error.Read more @ Linux Compatible