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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...SM PCI Scan: Backup Files DisclosureSM PCI Scan: Backup Files Disclosure
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7/27/2017 9:20 AM
 
Hello, everyone

We had performed security checks by security metrics PCI scan. Currently it is fails with an issue below:

Title
Backup Files Disclosure

Synopsis
It is possible to retrieve file backups from the remote web server.

Impact
By appending various suffixes (ie: .old, .bak, ~, etc...) to the names of various files on the remote host, it seems possible to retrieve their contents, which may result in disclosure of sensitive information. See also : http://projects.webappsec.org/Predictable-Resource-Location

Resolution
Ensure the files do not contain any sensitive information, such as credentials to connect to a database, and delete or protect those files that should not be accessible.

Data Received
It is possible to read the following backup files : - File : /Home/ctl/SendPassword~ URL : https://mysite.com/Home/ctl/SendPassword~
...(and a long list of other same urls)...


Does anybody have any thoughts, how this should be resolved? We are on DNN9, Windows Server 2012 R2.

Thank you!
 
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7/27/2017 3:15 PM
 
DNN usually does not create backup files, but a 3rd party software might.
please check your IIS website folder, whether there is a folder /Home/ containing .ascx, .aspx or other code files. This folder is not a default dnn folder.
otherwise, it might just be a false positive, as /ctl/ is a virtual path for controls to be displayed on any page by DNN, and not a backup.

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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7/31/2017 10:46 AM
 

Hello, Sebastian!

Thank you for you reply. I had reviewed a root of my IIS folder and there is no Home folder. But I have a Home page in DNN. We are not using third party modules except own developed and standard modules from DNN like HTML, etc. 

Am I correctly understand, that in this case an issue from SM can be omitted? Or may be it is possible to resolve it via url rewriting?

http://www.dnnsoftware.com/wiki/url-rewriting

It is possible to throw 404 error, when requested URL was not found, because right now, when I try to request, let's say, https://mysite.com/Page/SubPage~ DNN redirects me to https://mysite.com/Page

 

Thank you,

Dennis

 
New Post
7/31/2017 1:27 PM
 
Dennis,
it sounds to me that this issue can be omitted, there are multiple URLs for the send password control by design, maybe you can exclude it from search indexing.

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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7/31/2017 2:27 PM
 

Sesbastian,

Frankly speaking, log from Security Metrics contains URLs for all pages from my site with (~) at the end, not only for password. The question is, is it possible to disallow DNN to rewrite unknown URLs? In other words, allow known URLs and throw 404 for URLs with (~) at the end.

 

Thank you!

 
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