Crack the document protected by "form protection" by word

When using word for file protection, we often use form protection (Tool> Protection Document). The most thorough form protection is used.

Users cannot edit or perform Copy & paste operations.

However, the Word Document Vulnerability released a few days ago allows you to easily remove the password.

Let's test it by ourselves:

First, create a Word document and use form protection to protect the document. The tool-> protect the document-> check "is only allowed in the document.

Edit "-> choose" fill in the Form ". A Password box will pop up and enter the password twice (here I select 123 as the word

File Password), so that the file has been protected.

Then let's crack it, open the created Word document, save the file-> Save As-> select HTML format, and save it as an HTML document.

Open the HTML file in notepad and search for "W: unprotectpassword". You will see the 5bcecf7a text (If your password is

If the code is 123 ).

Then we use ultraedit or other similar tools to open the originally protected Word document and search for 7acfce5b.

Replace eight zeros to save disks. At this time, the password of the Word document is cleared, and you can cancel the file protection by yourself, so you do not need to enter the password.

Press enter.

MS has not provided a patch for this vulnerability, I think the short-term may not be able to solve this problem, it is recommended that later documents do not use this East

The West has been protected.
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