Blue Coat has released a security advisory to address the fraudulent TURKTRUST Inc. digital certificates.
Third-party certificate registrar TURKTRUST Inc. issued fraudulent certificates for *.google.com through incorrectly created subsidiary certificate registrars. Because the third-party registrar is trusted by the Microsoft Trusted Root Certification Authorities Store, Windows-based systems may be vulnerable to spoofing attacks. If an attacker possessed the fraudulent certificate, the attacker could masquerade as a valid google.com host, allowing the attacker to conduct man-in-the-middle attacks or phishing attacks, potentially leading to information disclosure.
Reports indicate that attacks using the fraudulent certificates have occurred in the wild.
Microsoft has released a security advisory and software updates to revoke the certificate on affected Windows systems.
Microsoft has released a security advisory at the following link: 2798897
Microsoft customers can obtain updates directly by using the links in the security advisory. These updates are also distributed by Windows automatic update features and available on the Microsoft Update service. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
Apple has released security advisory at the following link: HT5642. Apple has released updated software at the following link: iOS 6.1 Software Update<.
Blue Coat has released a security advisory at the following link: SA73. Blue coat users are advised to follow mitigation steps as mentioned in the vendor advisory.
Mozilla has released a security bulletin at the following link: MFSA 2013-20. Mozilla has released updated versions at the following links:
Version 3, January 29, 2013, 4:47 PM: Apple has released a security advisory and updated software to address the Fraudulent TURKTRUST Inc. digital certificates.
Version 2, January 9, 2013, 7:03 AM: Mozilla has released a security advisory and software update to address the Fraudulent TURKTRUST Inc. digital certificates.
Version 1, January 3, 2013, 10:59 AM: Fraudulent certificates for google.com were issued by a third-party certificate authority, possibly allowing spoofing attacks. Root certificate authorities have revoked the fraudulent certificates.
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.