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Forcepoint Secure Messaging 8.5 Password Reset Fail

Forcepoint Secure Messaging 8.5 Password Reset Fail
Posted Nov 6, 2018
Authored by Eitan Shav

The invalidation of a password reset flow in Forcepoint Secure Messaging version 8.5 allows a client side manipulation to re-enable it.

tags | advisory
MD5 | cfd8b5f1aed3c23504ac85c306d8bef2

Forcepoint Secure Messaging 8.5 Password Reset Fail

Change Mirror Download
When the user wants to reset his password, he then gets a password reset link to his mail. (The reset password page is made of "new password"
field and "reset password" button)

This password reset link will be valid only if:
1.the link wasn't used before.
2.the link was used within 24 hours of the password reset
request.

If the conditions are not met, the user will get some
error message saying "this link is not valid anymore" so that the password reset process will not proceed and the password field and the "reset password" button will be greyed-out.

BUT, if the users changes the disabled property of the password input field and the reset button inside the page's DOM he is able to restore it's functionality and reset the password.
So if an attacker gets this link, even if it's not valid anymore,
he is able to reset the password of a specific user and then get into his account

screen shots of POC:


1. https://eitrnel.000webhostapp.com/frcpnt/delete.the.disabled.value.png
2. https://eitrnel.000webhostapp.com/frcpnt/reset.mechanisem.recoverd.png
3. https://eitrnel.000webhostapp.com/frcpnt/post.req.to.the.server.png




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