Microsoft Corporation (MSFT): MS Outlook faces hack in China

Microsoft Outlook

A Chinese censorship monitoring organization called GreatFire.Org reports that Microsoft Corporation (NASDAQ:MSFT)’s Outlook online service has been hacked in China. The hackers performed the “man-in-the-middle attack” in which they can place themselves in between the online communications of the victims to receive, read and sent messages.

GreatFire mentions that the attack had only affected the IMAP and SMTP protocols of the service, but and logins from web interfaces weren’t breached. It’s also believed that the attack lasted for a day. GreatFire says that during the attack, users were warned of the existence of unknown servers. The warnings came from internet browsers of smartphones and computers such as the iPhone browser with the warning “Cannot Verify Server Identity, Continue or Cancel?”, or the FireFox browser with “that someone is trying to impersonate the site, and you shouldn’t continue.”

Users would normally click the continue button, unaware of the hacker being able to sniff their exchanged messages and data. GreatFire believes that the self-signed web certificates issued during the attack are from the China Internet Network Information Center (CNNIC) which is also suspected to be a part of previous man-in-the-middle attacks in China. says that “Given the dangerous nature of this attack on Outlook, we again strongly encourage organizations, including Microsoft and Apple, to immediately revoke trust for the CNNIC certificate authority.”

CNNIC is governed by the Cyberspace Administration of China, and GreatFire strongly believes that they have deliberately performed the attack, and that Chinese authorities are currently trying to crack down encrypted services to read private messages. Microsoft Outlook wasn’t the only victim of these attacks. Previously, Google, Yahoo and Apple services were affected as well, with Google’s GMail service was shut down in China last month. There were reports that the Google service was partially restored in China.

James Vrionis

James Vrionis knows Technology and is Based in the Palm Desert Area. Contact him at

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