OpenSSL has a two year old vulnerability that got fixed yesterday. [1]
If you do not use unattended-upgrades, update immediately! To check your OpenSSL version: openssl version -a OpenSSL 1.0.1 14 Mar 2012 built on: Wed Jan 8 20:50:06 UTC 2014 Build date should be post 7th of April 2014 Certificates should be regenerated as well. Test your websites. [2] It seems there is no fix for Trisquel yet. [3] [1] http://heartbleed.com/ [2] http://filippo.io/Heartbleed/ [3] https://trisquel.info/en/issues/11477
