Outra maneira de descobrir isso é simplesmente reiniciar seu servidor Apache e procurar nos logs informações:
$ sudo service apache2 restart
$ grep -i modsecurity /var/log/apache2/error.log
[Sun Mar 08 19:14:02.000210 2015] [:notice] [pid 1912] ModSecurity for Apache/2.7.7 (http://www.modsecurity.org/) configured.
[Sun Mar 08 19:14:02.000278 2015] [:notice] [pid 1912] ModSecurity: APR compiled version="1.5.1-dev"; loaded version="1.5.1-dev"
[Sun Mar 08 19:14:02.000290 2015] [:notice] [pid 1912] ModSecurity: PCRE compiled version="8.31 "; loaded version="8.31 2012-07-06"
[Sun Mar 08 19:14:02.000300 2015] [:notice] [pid 1912] ModSecurity: LUA compiled version="Lua 5.1"
[Sun Mar 08 19:14:02.000308 2015] [:notice] [pid 1912] ModSecurity: LIBXML compiled version="2.9.1"