Technical Description

Multiple vulnerabilities have been identified in Microsoft Internet Explorer, which could be exploited by remote attackers to take complete control of an affected system, disclose sensitive information, or conduct cross domain scripting attacks.

The first issue is due to an error when handling web redirections, which could be exploited by malicious people to conduct cross domain scripting attacks. For additional information, see : VUPEN/ADV-2006-2553

The second vulnerability is due to a memory corruption error when handling HTML pages with certain layout positioning combinations, which could be exploited by remote attackers to execute arbitrary commands by convincing a user to visit a malicious web page.

The third flaw is due to a memory corruption error when handling chained Cascading Style Sheets (CSS), which could be exploited by remote attackers to execute arbitrary commands by convincing a user to visit a malicious web page.

The fourth vulnerability is due to a memory corruption error when handling HTML pages with certain layout positioning combinations, which could be exploited by remote attackers to compromise a vulnerable system.

The fifth flaw is due to memory corruption errors when handling instantiating certain COM objects as ActiveX Controls, which could be exploited by remote attackers to execute arbitrary commands by convincing a user to visit a malicious web page.

The sixth issue is due to an origin validation error when handling specially crafted HTML pages, which could be exploited by malicious people to conduct cross domain scripting attacks.

The seventh flaw is due to an error when processing malformed scripts, which could be exploited by attackers to gain access to the window location of a Web page in another domain.

The eighth issue is due to an error when handling specially crafted FTP links, which could be exploited by attackers to execute arbitrary FTP commands.

Affected Products

Microsoft Internet Explorer 5.01 Service Pack 4 on Microsoft Windows 2000 Service Pack 4
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows 2000 Service Pack 4
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows XP Service Pack 1
Microsoft Internet Explorer 6 for Microsoft Windows XP Service Pack 2
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 Service Pack 1
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 (Itanium)
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 SP1 (Itanium)
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 x64 Edition
Microsoft Internet Explorer 6 for Microsoft Windows XP Professional x64 Edition

Solution

Apply patches :
http://www.microsoft.com/technet/security/Bulletin/MS06-042.mspx

References

http://www.vupen.com/english/advisories/2006/3212
http://www.microsoft.com/technet/security/Bulletin/MS06-042.mspx

Credits

Vulnerabilities reported by Sam Thomas, Cody Pierce, and Will Dormann.

ChangeLog

2006-08-08 : Initial release

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