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Windows 2000 Server Active Directory Buffer Overflow Vulnerability
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Secunia Advisory:
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SA9171
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Release Date:
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2003-07-02
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Last Update:
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2003-07-08
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Popularity:
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10,969 views
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Critical:
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Moderately critical
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Impact:
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DoS
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| OS: | Microsoft Windows 2000 Server
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Description:
A vulnerability has been identified in Windows 2000 Server, which can be exploited by malicious people to cause a DoS (Denial of Service) on a vulnerable system.
The vulnerablity is caused due to a boundary error in Active Directory. This can be exploited by sending a specially crafted LDAP v3 search request containing about 1000 "AND" or "OR" operators to a vulnerable Active Directory server, which will crash the "Lsass.exe" service and therefore automatically reboot the system within 30 seconds.
Reportedly, the vulnerability only affects Windows 2000 Server with Active Directory.
Solution:
Reportedly, this has been fixed in Windows 2000 Service Pack 4:
http://www.microsoft.com/Windows2000/downloads/servicepacks/sp4/
Provided and/or discovered by:
Eduardo Arias, Gabriel Becedillas, Ricardo Quesada, and Damian Saura (Core Security Technologies).
Original Advisory:
http://www.coresecurity.com/common/showdoc.php?idx=351&idxseccion=10
Other References:
Microsoft knowledge base article describing the vulnerability:
http://support.microsoft.com/default.aspx?kbid=319709
List of Security Fixes in Windows 2000 Service Pack 4:
http://support.microsoft.com/default.aspx?kbid=821665
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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