Today there was a major security announcement that affected a large number of online services. In short, if you’re running a website that is using OpenSSL (i.e. most websites that are secured by SSL) you are likely to be affected.
The steps for upgrading your server varies depending on your software stack and distribution. For instance, you can find the instructions for Ubuntu here.
We strongly urge all of our customers to check their websites for this vulnerability. Please note all CloudSigma services were patched yesterday morning and we believe no customer computing was compromised in association with this vulnerability.