Serious Cloudflare bug exposed a potpourri of secret customer data

  • 24 February 2017
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Service used by 5.5 million websites may have leaked passwords and authentication tokens.

 
                                 


 
Dan Goodin (US) - 24/2/2017
 
Cloudflare, a service that helps optimize the security and performance of more than 5.5 million websites, warned customers today that a recently fixed software bug exposed a range of sensitive information that could have included passwords, and cookies and tokens used to authenticate users.
 
A combination of factors made the bug particularly severe. First, the leakage may have been active since September 22, nearly five months before it was discovered, although the greatest period of impact was from February 13 and February 18. Second, some of the highly sensitive data that was leaked was cached by Google and other search engines. The result was that for the entire time the bug was active, hackers had the ability to access the data in real-time, by making Web requests to affected websites, and to access some of the leaked data later by crafting queries on search engines.
 
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