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Public disclosure of IIS security issue with semi-colons in URL by naziml

IIS has been alerted to the claim of a new security issue in IIS 6 and I wanted to explain the issue and our position on it. The issue in question affects only IIS 6 (Windows Server 2003) and arises when you send a URL with a semi-colon in it. IIS 6 uses...
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Issues installing KB 973917 on Windows Server 2003 by naziml

Some customers have reported issues of application pools unable to start after applying KB 973917 on Windows Server 2003 to add support for Extended Protection in Windows Authentication . The root cause of this issue is machines being in an unsupported...
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Extended Protection for Windows Authentication in IIS by naziml

We have just released a non-security update that allows administrators of IIS websites that use Integrated Windows Authentication (IWA) to protect against credential relaying. The feature is called “Extended Protection” and needs to be applied at multiple...
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FTP recursive list after applying MS09-053 by naziml

We recently released fixes for the publicly disclosed FTP vulnerabilities. One of the after-effects of applying this update will be that recursive list commands to IIS FTP 5.x, 6.0 will return the non-recursive listing. To make it clear, this feature...
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Fixes released for FTP vulnerabilities by naziml

Microsoft has released security bulletin MS09-053 that will address the FTP vulnerabilities that were publicly disclosed a couple of weeks ago. The information in this bulletin supercedes the previous advisory.
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Securing your FTP Server 101 by naziml

I have to admit that FTP has always been a second-class citizen for the IIS security team, and we usually put all our efforts into the HTTP platform. There has always been a notion that our old FTP server (FTP 6.0-) was never really popular due to lack...
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[Updated] IIS FTP server vulnerabilities for FTP 5.x and FTP 6 by naziml

There have been two recently publicly disclosed vulnerabilities for FTP 5, FTP 5.1 and FTP 6. Wade has gone through great detail to explain what platforms are affected by each vulnerability in his blog post . Microsoft has released and refreshed an advisory...
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Updated advisory for FTP Vulnerability on IIS by naziml

The public exposure of another vulnerability in the FTP stack has caused a revision in the Microsoft advisory. Please refer the advisory @ http://www.microsoft.com/technet/security/advisory/975191.mspx to get updated information on exposure and impact...
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Update for WebDAV vulnerability on IIS 5.x and IIS 6 by naziml

We now have a security update available to address the WebDAV extension vulnerability reported earlier. All customers affected should apply the update even if they have mitigated the issue through a workaround. The background here is that we had an encoding...
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Update Released for Dynamic IP Restrictions Beta by naziml

We had a couple of forum threads that reported an issue in the Beta module for Dynamic IP Restrictions . Since we are doing a significant amount of change for Beta 2, we wanted to unblock customers affected by this issue be releasing a patch. So here...
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WebDAV Authentication Bypass on IIS 5.0, 5.1 and 6.0 by naziml

Microsoft has released advisory 971492 about an Elevation of Privilege issue with the WebDAV extension for IIS 5.0, 5.1 and 6.0. These versions of IIS reside on Windows Server 2000, Windows XP and Windows Server 2003 respectively. The advisory contains...
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Token Kidnapping fixed by naziml

I had gone into a little detail about explaining token kidnapping in an earlier post . Despite all the difficulties involved in fixing this, MS has released a comprehensive patch that addresses all the issues in MS09-012 . This was a monumental effort...
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Script to lock down IIS paths by naziml

In IIS 7 we have request filtering available to help with locking down files and directories that you don't want to serve out. This is useful for resources (like configuration) that you want your IIS worker process to have access to, but not serve it...
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Script to install UrlScan v3.0 as a site filter. by naziml

Although using WIX to create an MSI to do this task is a cleaner approach, it is too heavy duty for me. I do this often enough to warrant creating a script for it, so I though I would share it out. To use it you would run: InstallUrlScanAtSite.js -siteid...
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Token Kidnapping in Windows by naziml

Microsoft has just released MS09-012 to address this issue in it’s entirety. Get further details here . You have probably heard about the Token Kidnapping vulnerability in Windows and read Microsoft's security advisory on it and are wondering why there...
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