Is there a way, to manually check for openssl CVE-2014-0160 vulnerability?

Solution 1:

You could try:

openssl s_client -connect domain.com:443 -tlsextdebug 2>&1 | grep 'server extension "heartbeat" (id=15)' || echo safe

From https://devcentral.f5.com/questions/openssl-and-heart-bleed-vuln

Solution 2:

You can use this script for example: http://rehmann.co/projects/heartbeat/ssltest.py