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Security Breach–Install KB2524375 ASAP

Posted by Mikael Nystrom on March 24, 2011

Today it was revealed that a serious security breach occurred at Comodo, a trusted certificate provider. The breach appears to have come from Iran and several “high value certificates” were obtained.
These X.509 certificates include:

  • (3 certificates)
  • “Global Trustee”

To protect your Windows computer (PC or server) from trusting these high value certificates, download and install KB2524375 Microsoft Security Advisory: Fraudulent Digital Certificates could allow spoofing from Microsoft as soon as possible. The installation takes only a minute and does not require a restart.
KB2524375 updates both the Computer’s and User’s Untrusted Certificates list to include the compromised certificates.
Here’s what the list looks like before the update:


And here’s what it looks like after the update:


Please take a minute to update your computers now. This update is also being pushed out through Windows Update as I write this.

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