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HomeHomeOur CommunityOur CommunityCommunity Membe...Community Membe...Simple security check for your siteSimple security check for your site
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9/12/2011 9:35 AM
 
Will Sugg


www.planetmaine.net
Joined: 10/30/2006
Posts: 232
I found a vulnerability in two of my DNN sites (5.6.3) that hackers were exploiting to upload shell files into the root. To see if your site has the vulnerability the hackers are finding try this from Google:

site:www.yoursite.com upload -intellectual

(-intellectual gets rid of results for your 'Terms' pages)

Check through those pages that return the word upload to make sure there is not a vulnerability on your site with a page that allows anonymous uploads into the file structure.

thanks,

Will Sugg, Planet Maine
 
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9/12/2011 1:37 PM
 
cathal connolly


cathal connolly's Avatar

www.cathal.co.uk
Joined: 4/9/2003
Posts: 9676
Please note, there is no known vulnerability with DotNetNuke 5.6.3 regarding uploads. The advice Will is giving is valid in that some 3rd party modules may have added aspx pages to handle uploads and these pages if found may allow a hacker the ability to upload a file. Searching for potential issues such as this is known as "google dorking" and is a common technique to search for known or potential problems - and it makes sense for users to apply the same techniques to ensure that any 3rd party modules do not contain potential vulnerable pages such as this.

As to the upload of shell files -this relies on the site running on IIS6 (which is no longer a supported OS) and not applying a secure configuration and is not a DotNetNuke issue - i blogged on this a few years back at http://www.dotnetnuke.com/Resources/B... . Please note, we added code in 6.0 to check for the semicolon asp bug issue to provide protection for sites still running under IIS6 - upgrading to that version will stop the shell attacks.


Thanks.
Buy the new Professional DNN7: Open Source .NET CMS Platform book Amazon US
 
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9/12/2011 5:27 PM
 
Will Sugg


www.planetmaine.net
Joined: 10/30/2006
Posts: 232
Right - not implying at all a security issue with 5.6.3 rather this searches for third party modules that have the weakness. That was our issue. - thanks
 
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