Certificates, IIS, Security, SSL, Troubleshooting, Web

Dealing with SSLv3 Padding Oracle On Downgraded Legacy Encryption Vulnerability (POODLE)

A lot of you may be getting emails from your sys admins telling you about needing to protect yourself from the POODLE vulnerability. I wanted to post my response back to what I did to bring my servers into compliance.

I used a tool called IISCrypto to place the server in best practice template from the command line. You can do it to be in PCI, PCI31 or FIPS140 compliance as well.

Here’s what I ran for what got fixed:

ss1

They also offer a GUI that you can run to see exactly what’s being used. Here’s the box after I applied the command ran above to confirm the removal of PCT 1.0 & SSL 2.0/3.0:ss2

My recommendation would be to deploy the command line version of the tool and execute the best practice template, let it apply the best practice template and restart the box.

However, if you don’t prefer a 3rd party tool then you can follow the Microsoft suggested actions to update the registry entries and build a .reg script to run.

Hope this helps.