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Date: 6 Apr 2005 01:55:57 -0000 From: Luca Ercoli <io@...aercoli.it> To: bugtraq@...urityfocus.com Subject: Microsoft Explorer Denial of Service Package: Microsoft Explorer Auth: http://www.microsoft.com/ Vulnerability: Denial of Service System(s) affected: - Tested on Windows XP Home Edition [explorer 6.00.2800.1106 (xpsp1.020828-1920)] - Windows 2000 seem to be not vulnerable. - Vulnerability has not been tested on other versions of Microsoft Windows Disclaimer: ========== The information is provided "as is" without warranty of any kind. The author of this issue shall not be held liable for any downtime, lost profits, or damages due to the informations contained in this advisory. Summary: ------- A vulnerability has been found in Microsoft Explorer (explorer.exe) for Windows XP, which can be exploited by malicious user to compromise system stability by consuming 99% CPU resources. What causes the vulnerability? ----------------------------- A vulnerability has been discovered in the way that Microsoft Explorer processes image's attributes for the GIF file type. Vulnerability Description: ------------------------- A specially crafted image can be used to exploit this security flaw, that will be triggered by navigating into a directory which contains a malicious file (rarely, in order to exploit the vulnerability, you must select the malicious image using the mouse or the keyboard). Exploit: ------- www.lucaercoli.it/MSExplorer/exploder.zip Vendor Status: ------------- The vendor has not been contacted Credits: -- Luca Ercoli <io [at] lucaercoli.it> http://www.lucaercoli.it
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