RE: Harden ASP.NET Configuration

From: Jolyon Wharton <joly1(at)bombdiggity.com>
Date: Tue May 13 2003 - 09:49:10 EDT

IMHO dotnet is not too bad out the box, it will never be *BSD but it's not bad. From what I gather there isn't much to bolting down dotnet as a web application other than the usual security procedures one would go though anyway.

To answer you question about extension, most of what you have quoted there are processed file to do with dymanic page delievery (.aspx, .vb, .cs etc) or to do with web services (vsdisco, .soap, asmx etc) or config file (.asax, .config) so I guess if you weren't going to use one of these aspects of ASP.NET then you could remove the mapping. Presonally I wouldn't. There are some for creating you own controls (ascx)and for delivering to other media consumers (ashx). The .csproj and .vbproj are the project files and shouldn't be posted to a production box anyway although ASP.DOT will not servre them through a web browser anyway. But at the end of the day they are only xml files to tell the compiler what's included and don't content any credentials so what would be the harm if they were hacked anyway?

Hope this helped

Regards
Jolyon

-----Original Message-----
From: :: gary :: [mailto:gary.bright@cisd.panasonic.co.uk] Sent: 13 May 2003 14:18
To: focus-ms@securityfocus.com
Subject: Harden ASP.NET Configuration

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Hello Everyone

I'm trying to find explanations for each of these application mappings which get installed with .net framework.

I know its comes down to what the relevant application has been written for, but if I knew in what context they would get used in, I believe that would help me understand

I'll also be interested to hear of how other IIS Admins have gone about the deployment of the .net framework to a live internet environment, for example what advice they can offer me and whether of not they trimmed down the application mappings or left them as standard.

As well trying to build further on my understanding of .NET (from a security point of view) the main thing I'm scared of is it that old default settings had mappings like

.htw, .ida, .idq, .asp, .cer, .cdx, .asa, .idc, .shtm, .shtml, .stm,

Which later on Microsoft provided tools to easily disable them realising there mistake of including them by default and while I don't want to Knock the efforts MS has put into security recently I can't help feeling that they are lining themselves up for kicking have all these mappings for .net enabled by default (after the framework install) and providing very little documentation for locking down the .NET IIS Configuration (see snip from iis5.0 checklist.)

I know that while it comes down to only enabling the relevant mappings for your website I just don't think MS is making that point with the .NET framework

Be Interested in what you think

Thanks for time

Best Regards

Gary

<SNIP>
Harden ASP.NET Configuration

If the .NET Framework has been installed on the system, download and install the latest version of the .NET Framework and any service packs. Review the configuration of the .NET Framework, and ASP.NET in particular, to ensure ASP.NET does not increase your vulnerability to attack. </SNIP>

[.net Application Mappings]

.asax

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FastTrain has your solution for a great CISSP Boot Camp. The industry`s most recognized corporate security certification track, provides a comprehensive prospectus based upon the core principle concepts of security. This ALL INCLUSIVE curriculum utilizes lectures, case studies and true hands-on utilization of pertinent security tools. For a limited time you can enter for a chance to win one of the latest technological innovations, the SEGWAY HT. Log onto http://www.securityfocus.com/FastTrain-focus-ms

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Received on Tue May 13 13:25:23 2003