security - How can I check if my embedded Linux's SSL is not affected by heartbleed, without relying on the version number?

There are a lot of embedded Linux device that are built on Linux, that are used exactly for security purposes, like gateways, if I check OpenSSL I get:

openssl version -a

gets -»

OpenSSL 1.0.0k 5 Feb 2013

But this maybe patched or merged and I don't have access to the sources, how can I check that my system is not vulnerable without relying on openssl version -a

Answer

There is a perl script that allows you to check our own services. There are also online tools. One more.