We’re working on a hot-fix release where we revert #19573 to address this.
Though in the meanwhile this script will help unblock your site if you’ve already upgraded to 2.5.0p6. It patches the init.d script for Apache to use LD_PRELOAD to make sure that the OpenSSL packaged with Checkmk is used by Apache rather than the system OpenSSL.
patch-werk-19575-apache.sh (6.0 KB)
Cheers,
Nigel