6a96547ef0
git-svn-id: http://webgoat.googlecode.com/svn/branches/webgoat-6.0@485 4033779f-a91e-0410-96ef-6bf7bf53c507
34 lines
1.7 KiB
HTML
34 lines
1.7 KiB
HTML
<div align="Center">
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<p><b>Lesson Plan Title:</b>CSRF User Prompt By-Pass</p><br/>
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</div>
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<p><b>Concept / Topic To Teach:</b> </p>
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This lesson teaches how to perform CSRF attacks that by-pass user confirmation prompts.
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<br>
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<div align="Left">
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<p>
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<b>How the attacks works:</b>
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<p>
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Cross-Site Request Forgery (CSRF/XSRF) is an attack that tricks the victim into loading a page
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that contains a 'forged request' to execute commands with the victim's credentials. Prompting
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a user to confirm or cancel the command might sound like a solution, but can be by-passed if
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the prompt is scriptable. This lesson shows how to by-pass such a prompt by issuing another
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forged request. This can also apply to a series of prompts such as a wizard or issuing multiple
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unrelated forged requests.</p>
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</div>
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<p><b>General Goal(s):</b> </p>
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<!-- Start Instructions -->
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Similar to the CSRF Lesson, your goal is to send an email to a newsgroup that contains multiple
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malicious requests: the first to transfer funds, and the second a request to confirm the prompt
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that the first request triggered. The URL should point to the CSRF lesson with an extra
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parameter "transferFunds=4000", and "transferFunds=CONFIRM". You can copy the shortcut from the
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left hand menu by right clicking on the left hand menu and choosing copy shortcut. Whoever
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receives this email and happens to be authenticated at that time will have his funds transferred.
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When you think the attack is successful, refresh the page and you will find the green check on
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the left hand side menu.<br/>
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<b>Note that the "Screen" and "menu" GET variables will vary between WebGoat builds. Copying the menu link on the left will give you the current values.</b>
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<!-- Stop Instructions -->
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