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34 lines
1.8 KiB
Text
Executable file
34 lines
1.8 KiB
Text
Executable file
A while back I was playing around with Perl$hop, which if you are not
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aware, is an e-commerce script developed by Waverider Systems. XSS
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(Cross Site Scripting), Directory Traversal, Code Execution, and more!
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Wow, that sure is a lot of vulnerabilities for one product. It would
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seem as if the developers had little to no regard for web application
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security. Which, were this not a free product, I might comment further
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upon. As this is not the case, allow me to continue.
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One of the initial vulnerabilities I noticed when viewing the source
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code to a product page was the existence of a hidden input field named
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ITEM_PRICE. Now we simply download the source to the page, edit the
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hidden value of input field ITEM_PRICE to whatever we want, as an
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example value=?0.01?, and save. Reopen and purchase the item. The
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following checkout page will verify your success or lack thereof. So we
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can set our own price, fun stuff!
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Next we examine perlshop.cgi and notice that the script does not
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properly sanitize user input. After a little variable injection we find
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that the GET variable ?thispage? is vulnerable to a directory traversal
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and potential code execution depending on the environment. If you were
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hoping for an exploit example, here it is:
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http://target/cgi-bin/perlshop.cgi?ACTION=ENTER%20SHOP&thispage=../../../../../../../../etc/passwd&ORDER_ID=%21ORDERID%21&LANG=english&CUR=dollar
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And lastly, to save myself the trouble, I?ll just say that the GET
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variable CUR, thispage, LANG, and most likely others contain cross site
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scripting vulnerabilities. XSS vulnerabilities are not nearly as
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critical as the aforementioned directory traversal and code execution
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vulnerabilities though they should still be taken seriously as session
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fixation attempts could allow a hacker to hijack accounts.
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www.shadow.net
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# milw0rm.com [2009-08-04]
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