Microsoft Security Advisory (2798897)
This is a security advisory about fraudulent certificates that need to be revoked!
As Security Garden wrote here:
Microsoft released Security Advisory 2798897 to provide notification regarding a a fraudulent digital certificate issued by TURKTRUST Inc.
TURKTRUST Inc. incorrectly created two subsidiary Certificate Authorities: (*.EGO.GOV.TR and e-islem.kktcmerkezbankasi.org). The *.EGO.GOV.TR subsidiary CA was used to issue a fraudulent digital certificate to *.google.com.
The Certificate Trust list update is available through Windows Updates.
Be sure to apply any Windows Updates that are waiting (showing in the lower right corner in the system tray) to be installed and/or check for Windows Updates manually to be sure you have the update!
This is an important update since fraudulent digital certificates can make spoofing attacks possible.
More information at KrebsOnSecurity here:
Google and Microsoft today began warning users about active phishing attacks against Google’s online properties. The two companies said the attacks resulted from a fraudulent digital certificate that was mistakenly issued by a Turkish domain registrar.
In a blog post published today, Google said that on Dec. 24, 2012, its Chrome Web browser detected and blocked an unauthorized digital certificate for the “*.google.com” domain.
Google blocked both certificates in Chrome on December 26. It now plans to no longer display “Extended Validation” status in Chrome for any certificate issued by TurkTrust. It’s debating whether to also block any connection to HTTPS sites validated by the CA.
Mozilla announced that it too was revoking trust for the two problem certificates in a Firefox update landing next Tuesday. TurkTrust’s root certificate is also being excluded from Firefox for the time being. Microsoft is doing the same, as are other browser vendors.
I would imagine that Apple will be also releasing an update to their Digital Certificate list if this is a universal issue.