Nessus was able to detect the OpenSSL version. Description Nessus was able to extract the OpenSSL version from the web server's banner. Note that security patches in many cases are backported and the displayed version number does not show the patch level. Using it to identify vulnerable software is likely to lead to false detections. See Also
Oct 19, 2017 Check OpenSSL version - Web Hosting Discussion Aug 06, 2014 debian - How to distinguish which version of OpenSSL is
Heartbleed - Checking your OpenSSL version
Apr 05, 2019 · Checking SSL / TLS version support of a remote server from the command line in Linux. Method 1: openssl s_client The simplest way to check support for a given version of SSL / TLS is via openssl s_client. openssl is installed by default on most Unix systems 1
"“A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64kB of memory to a connected client or server,” Unfortunately it is quite normal to have multiple versions of openSSL installed on your system, as well as multiple certificates and keys, therefore you may have to check in several places:
Jan 23, 2015 · After upgraded openssl version from 0.9.8zc to 0.9.8zd, how to verify apache is now using the latest openssl version? Thanks in advance. You can restart apache and watch what's written in error_log.