Bugtraq mailing list archives
IIS 5.0 cross site scripting vulnerability - using .htw
From: Georgi Guninski <guninski () GUNINSKI COM>
Date: Sat, 28 Oct 2000 23:37:05 +0300
Georgi Guninski security advisory #26, 2000 IIS 5.0 cross site scripting vulnerability - using .htw Systems affected: IIS 5.0/Windows 2000. Exploited with browser (IE,NC) but the problem is in the web server. Risk: Medium Date: 28 October 2000 Legal Notice: This Advisory is Copyright (c) 2000 Georgi Guninski. You may distribute it unmodified. You may not modify it and distribute it or distribute parts of it without the author's written permission. Disclaimer: The opinions expressed in this advisory and program are my own and not of any company. The usual standard disclaimer applies, especially the fact that Georgi Guninski is not liable for any damages caused by direct or indirect use of the information or functionality provided by this advisory or program. Georgi Guninski, bears no responsibility for content or misuse of this advisory or program or any derivatives thereof. Description: Using specially designed URLs, IIS 5.0 may return user specified content to the browser. This poses great security risk, especially if the browser is JavaScript enabled and the problem is greater in IE. By clicking on links, just visiting hostile web pages or opening HTML email the target IIS sever may return user defined malicous active content. This is a bug in IIS 5.0, but it affects end users and is exploited with a browser. A typical exploit scenario is stealing cookies which may contain sensitive information. Details: The following URL: ---- http://iis5server/null.htw?CiWebHitsFile=/default.htm&CiRestriction="<SCRIPT>alert(document.domain)</SCRIPT>" ---- (URL may be wrapped in mail clients) executes in the browser javascript provided by "iis5server" but defined by a (malicous) user. The URL may be used in a link or a script. If /default.htm does not exist another document must be specified. Workaround: Remove the .htw extension from application mappings. Vendor status: Microsoft was notified on 24 October. Regards, Georgi Guninski http://www.guninski.com
Current thread:
- IIS 5.0 cross site scripting vulnerability - using .htw Georgi Guninski (Oct 30)
- <Possible follow-ups>
- Re: IIS 5.0 cross site scripting vulnerability - using .htw Microsoft Security Response Center (Oct 30)
- Re: IIS 5.0 cross site scripting vulnerability - using .htw Georgi Guninski (Oct 31)