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Secunia Advisory SA15546

Microsoft Internet Explorer "window()" Arbitrary Code Execution Vulnerability
Secunia Advisory SA15546
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Release Date 2005-05-31
Last Update 2005-12-13
   
Popularity 156,658 views
Comments 0 comments

Criticality level Extremely criticalExtremely critical
Impact System access
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Patch
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
Remediation status Secunia CSI, Secunia PSI
Automated scanning Secunia CSI, Secunia PSI
   
Software:
Microsoft Internet Explorer 5.5
Microsoft Internet Explorer 6.x
Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2005-1790 CVSS available in Customer Area
  

Description

Benjamin Tobias Franz has discovered a vulnerability in Internet Explorer, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to certain objects not being initialized correctly when the "window()" function is used in conjunction with the "<body onload>" event. This can be exploited to execute arbitrary code on a vulnerable browser via some specially crafted JavaScript code called directly when a site has been loaded.

Example:
<body onload="window();">

Successful exploitation requires that the user is e.g. tricked into visiting a malicious website.

The vulnerability has been confirmed on a fully patched system with Internet Explorer 6.0 and Microsoft Windows XP SP2, and Internet Explorer 6.0 and Microsoft Windows 2000 SP4.

Note: A PoC exploit has been released for this vulnerability.


Solution
Apply patches.
Further details available in Customer Area

Provided and/or discovered by
Originally reported by:
Benjamin Tobias Franz

Code Execution PoC by:
S. Pearson, Computer Terrorism (UK)

Changelog
Further details available in Customer Area

Original Advisory
S. Pearson:
http://www.computerterrorism.com/research/ie/ct21-11-2005

Microsoft (KB911302):
http://www.microsoft.com/technet/security/advisory/911302.mspx
http://support.microsoft.com/kb/911302

MS05-054 (KB905915):
http://www.microsoft.com/technet/security/Bulletin/MS05-054.mspx

Other references
Further details available in Customer Area

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Microsoft Internet Explorer "window()" Arbitrary Code Execution Vulnerability 
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