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                     Secunia Research 12/12/2006

    - Internet Explorer Script Error Handling Memory Corruption -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9

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1) Affected Software 

Microsoft Internet Explorer 6.0

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2) Severity 

Rating: Highly critical
Impact: System compromise
Where:  Remote

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3) Description of Vulnerability

Secunia Research 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 an error within the exception
handling of script errors. This can be exploited to corrupt memory via
an HTML document containing specially crafted JavaScript that triggers
certain errors simultaneously.

Successful exploitation allows execution of arbitrary code.

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4) Solution 

Apply patches (see the vendor's advisory for details).

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5) Time Table 

15/08/2006 - Vendor notified.
15/08/2006 - Vendor response.
12/12/2006 - Public disclosure.

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6) Credits 

Discovered by Jakob Balle and Carsten Eiram, Secunia Research.

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7) References

MS06-072 (KB925454):
http://www.microsoft.com/technet/security/Bulletin/MS06-072.mspx

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2006-5579 for the vulnerability.

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8) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the 
security and reliability of software in general:

http://corporate.secunia.com/secunia_research/33/

Secunia regularly hires new skilled team members. Check the URL below to
see currently vacant positions:

http://secunia.com/secunia_vacancies/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/ 

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9) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2006-58/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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