QuoVadis Posted October 27, 2016 Report Share Posted October 27, 2016 Recently I was in a hotel needing to make a payment, there was no phone signal so I could not receive my Two Factor Auth token. Luckily for me Paypal’s 2FA took less than five minutes to bypass. Proof of ConceptStep 1: Login with a valid username and password, click on the “Try another way” link. Step 2: Enter any answer for security questions. Step 3: Using a proxy, remove “securityQuestion0” and “securityQuestion1” from the post data. Step 4: Profit Advisory Timeline 03/10/16 - Reported issue to Paypal 04/10/16 - Paypal begin investigation of issue 21/10/16 - Paypal report issue as fixed 21/10/16 - Paypal award bounty https://henryhoggard.co.uk/blog/Paypal-2FA-Bypass 2 Quote Link to comment Share on other sites More sharing options...
