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Secunia Research: Microsoft Agent URL Parsing Memory Corruption Vulnerability

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                     Secunia Research 10/04/2007

   - Microsoft Agent URL Parsing Memory Corruption Vulnerability -

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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 

* Windows 2000 SP4
* Windows XP SP2 Windows Server 2003 SP2OTE: Other versions may also be affected.

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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 Microsoft Windows,
which can be exploited by malicious people to compromise a user's
system.

The vulnerability is caused due to an error in Microsoft Agent
(agentsvr.exe) when processing specially crafted URLs passed as
arguments to certain methods.

Successful exploitation allows execution of arbitrary code when a user
e.g. visits a malicious website with Internet Explorer.

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4) Solution 

Apply patches (see Microsoft security bulletin for details).

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5) Time Table 

11/12/2006 - Vendor notified.
11/12/2006 - Vendor response.
10/04/2007 - Public disclosure.

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6) Credits 

Discovered by JJ Reyes and Carsten Eiram, Secunia Research.

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7) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2007-1205 for the vulnerability.

MS07-020 (KB932168):
http://www.microsoft.com/technet/security/Bulletin/MS07-020.mspx

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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/2006-74/

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

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