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Cyberattacks January 2013 [Part I] – Fraudulent Digital Certificates Could Allow Spoofing

Fake Turkish digital Certificates blocked by Browser vendors – The Hacker News present

Trust

A fraudulent digital certificate that could be used for active phishing attacks against Google’s web properties. Using the certificate it is possible to spoof content in a classic phishing schema or perform a man-in-the-middle attack according Google Chrome Security Team and Microsoft experts.Microsoft has been immediately started the procedure to update its Certificate Trust list (CTL) and all versions of its OSs to revoke the certificate. Microsoft has also decided to revoke other two certificates for the same reason, it seems that some attacks using the first certificate have been already detected, fraudulent digital certificate that was mistakenly issued by a domain registrar run by a Turkish domain registrar.

Microsoft is aware of active attacks using one fraudulent digital certificate issued by TURKTRUST Inc., which is a CA present in the Trusted Root Certification Authorities Store. This fraudulent certificate could be used to spoof content, perform phishing attacks, or perform man-in-the-middle attacks. This issue affects all supported releases of Microsoft Windows.

TURKTRUST Inc. incorrectly created two subsidiary CAs (*.EGO.GOV.TR and e-islem.kktcmerkezbankasi.org). The *.EGO.GOV.TR subsidiary CA was then used to issue a fraudulent digital certificate to *.google.com. This fraudulent certificate could be used to spoof content, perform phishing attacks, or perform man-in-the-middle attacks against several Google web properties. To help protect customers from the fraudulent use of this digital certificate, Microsoft is updating the Certificate Trust list (CTL) and is providing an update for all supported releases of Microsoft Windows that removes the trust of certificates that are causing this issue.” It’s still unknown which is the real target of attack neither their geographic distribution, Microsoft advisory refers the domain kktcmerkezbankasi.org a web site that present itself as the Central Bank of the Turkish Republic of Northern Cyprus (TRNC).

Google On-Line Security Blog published a blog post that reported that on Dec. 24, 2012, its Chrome Web browser detected and blocked an unauthorized digital certificate for the “*.google.com” domain. The security repercussions are very critical, any attacker with the possibility to sign using a certificate of a CA can sign certificates for any domain.

Advisories:

“Microsoft Security Advisory (2798897) -Fraudulent Digital Certificates Could Allow Spoofing”

Microsoft Security Advisory 2798897 Security TechCenter

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