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| | Hotmail 'HTML+TIME' Tag Filtering Hole Permits Remote Users to Conduct Cross-Site Scripting Attacks |
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Categorie: Vulnerability
Posted: 2004-03-24 by ReCall
Views: 392
Source: Click here
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| | Details |
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Description: An input validation vulnerability was reported in Hotmail when used in conjunction with Microsoft Internet Explorer (IE). A remote user can conduct cross-site scripting attacks.
GreyMagic Software reported that a remote user can create HTML that invokes the Internet Explorer 'HTML+TIME' feature to manipulate attributes in the HTML, such as the '' tag, to execute malicious scripting code. A remote user can send some specially crafted HTML that, when viewed by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the Hotmail site and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
The HTML document must declare the namespace and specify the HTML+TIME feature for that namespace, the report said. In IE, the document can use the '' tag to declare the namespace and the '' element to bind the HTML+TIME feature to the namespace.
Some demonstration exploit tags are provided:
Optional text here...
The vendor was reportedly notified on March 11, 2004.
The original advisory and a demonstration exploit proof-of-concept is available at:
http://www.greymagic.com/security/adv isories/gm005-mc/
Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the Hotmail site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution: Microsoft has fixed the Hotmail service.
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