Edit

Web browsers can't connect to a website by using SSL with KB2661254 installed

  • Article

This article helps you resolve the problem where web browsers can't connect to a website by using Secure Sockets Layer (SSL) in Internet Explorer.

Original product version:   Internet Information Services 8.0, Internet Explorer 10, Internet Explorer 9
Original KB number:   2744241

Symptoms

You have a web browser installed on a computer running a Windows-based operating system. You try to use the web browser to view a website over a secure Secure Sockets Layer (SSL)/Hypertext Transfer Protocol Secure (HTTPS) connection. In this configuration, you are unable to connect to the website over SSL/HTTPS. When the problem occurs, users may see an error message similar to the following, depending on the version of their web browser:

Cannot find server or DNS Error

Or

There is a problem with this website's security certificate. Security certificate problems may indicate an attempt to fool you or intercept any data you send to the server

Or

Internet Explorer Cannot Display the Webpage

When the problem occurs, you may be able to view the same website over a standard HyperText Transfer Protocol (HTTP) connection (which doesn't use SSL), and you may be able to view other websites over an SSL/HTTPS connection.

Cause

The problem occurs because the website the client is trying to browse to over SSL has an RSA security certificate that uses cryptographic keys that are less than 1024 bits in length. For more information regarding the security impact associated with the changes made by KB2661254, see Microsoft Security Advisory 2661254.

Resolution

See the Microsoft Security Advisory 2661254 to resolve this issue.

If you are the website Administrator and the website is running on Microsoft Internet Information Services (IIS), see the More information section below for information on attaining and installing SSL certificates.

More information