We have a BlackBerry Express Server 5for our older models of BlackBerry smartphones (yes, we are still a proud Canadian company who trusts Blackberry :) ). This morning I had to create a new user in the servers admin console and activate a new device but I am getting a HTTP 404 Page not available message. Fun! right?
First thing I am thinking of is the updates that I pushed out last week. So, first thing first, I find a computer that didn't receive the updates yet to see if that could be the problem... Guess what? Bingo!
Now, I just have to find which update was causing the problem. So I look at my recently installed updates and started to Google them one by one! Altough I've already gone this process when I approuved these updates, it's never clear what could cause a problem!
Long story short, to save you sometime guys, here is the Windows Update that broke my BlackBerry Express Server Admin console;
Here is how Microsoft describes this update;
This security update resolves a vulnerability in Windows. The vulnerability could allow information disclosure when Secure Channel (Schannel) allows the use of a weak Diffie-Hellman ephemeral (DHE) key length of 512 bits in an encrypted Transport Layer Security (TLS) session. Allowing 512-bit DHE keys makes DHE key exchanges weak and vulnerable to various attacks. For an attack to be successful, a server has to support 512-bit DHE key lengths. Windows TLS servers send a default DHE key length of 1,024 bits.
For those who are curious and interested into more details can look on the following links ;
And it looks like I am not alone who is having problems with this update either;