[Xerte-dev] Re: SECURITY PATCH for upload.php

[Pat @ Pgogy]

Hello,

Problem is getting a list of types the models support. I think there is a case for saying the model should list the extensions it supports as it is partly their job to do it. This way the model could post the allowed types and the list is generated on the fly?

I agree preventing php is a good thing, but I think the problem is not knowing what types are acceptable is a real curveball

Pgogy Webstuff - http://www.pgogywebstuff.com
Makers of web things of a fair to middling quality

On 7 Mar 2013, at 15:32, "Smith, John" <J.J.Smith at gcu.ac.uk> wrote:

> Hi Pat,
>  
> I didn’t copy your regexp or your select list directly but translated the select code into a comma separated list so that it can be moved elsewhere if required…
>  
> I noticed the list in the sitedetails table but it is of Mime Types. I think it would be best practice to use extensions, content headers, mimetypes and any other method available to whitelist the allowable files but I think that might take a bit more work…
>  
> I think it is leaving a load of sites out there very vulnerable so we should try to  find a good way to shore this up before the next release. What do you think? I’ll have a go at adding in some code to deal with content headers and mimetypes
>  
> Regards,
>  
> John Smith
> Learning Technologist
> School of Health & Life Sciences
> Glasgow Caledonian University
>  
> From: xerte-dev-bounces at lists.nottingham.ac.uk [mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Pat @ Pgogy
> Sent: Thursday, March 07, 2013 2:54 PM
> To: For Xerte technical developers
> Subject: [Xerte-dev] Re: SECURITY PATCH for upload.php
>  
> Hello,
>  
> I hobble the Wordpress version deliberately to only allow a few file types but that isn't the list that full XOT needs (there is in fact, no list, hence the problem).
>  
> My reg exp is a bit flaky as well, if you copied that over.
>  
> There is a sort of whitelist in the sitedetails table as the media upload properties panel page uses this - but not sure this is the XOT list.
> 
> Pgogy Webstuff - http://www.pgogywebstuff.com
> Makers of web things of a fair to middling quality
> 
> On 7 Mar 2013, at 13:01, "Smith, John" <J.J.Smith at gcu.ac.uk> wrote:
> 
> Hi,
>  
> I’ve just committed a change to upload.php (revision 714) to stop users exploiting a system by uploading php code. I’ve added a whitelist and stuck in the same allowed file extensions that Pat uses in the Wordpress plugins.
>  
> Can someone test this and advise if there are any other media types that we want/need to allow?
>  
> There was also a session check but exit(); was commented out therefore in an unpatched system ANYONE can post data to upload.php and get some code onto the server. I’ve uncommented this now but does anyone know why it was commented out in the first place?
>  
> Regards,
>  
> John Smith
> Learning Technologist
> School of Health & Life Sciences
> Glasgow Caledonian University
>  
> 
> Glasgow Caledonian University is a registered Scottish charity, number SC021474
> 
> Winner: Times Higher Education’s Widening Participation Initiative of the Year 2009 and Herald Society’s Education Initiative of the Year 2009.
> http://www.gcu.ac.uk/newsevents/news/bycategory/theuniversity/1/name,6219,en.html
> 
> Winner: Times Higher Education’s Outstanding Support for Early Career Researchers of the Year 2010, GCU as a lead with Universities Scotland partners.
> http://www.gcu.ac.uk/newsevents/news/bycategory/theuniversity/1/name,15691,en.html
> 
> 
> 
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> 
> 
> 
> Glasgow Caledonian University is a registered Scottish charity, number SC021474
> 
> Winner: Times Higher Education’s Widening Participation Initiative of the Year 2009 and Herald Society’s Education Initiative of the Year 2009.
> http://www.gcu.ac.uk/newsevents/news/bycategory/theuniversity/1/name,6219,en.html
> 
> Winner: Times Higher Education’s Outstanding Support for Early Career Researchers of the Year 2010, GCU as a lead with Universities Scotland partners.
> http://www.gcu.ac.uk/newsevents/news/bycategory/theuniversity/1/name,15691,en.html
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