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Windows Workstation Service NetrWkstaUserEnum Denial of Service
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Secunia Advisory:
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SA23487
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Release Date:
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2006-12-26
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Last Update:
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2006-12-27
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Popularity:
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17,176 views
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Critical:
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Not 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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Unpatched
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| OS: | Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Server
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional
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| CVE reference: | CVE-2006-6723
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Description:
h07 has discovered a weakness in Microsoft Windows, which can be exploited by malicious people to cause a DoS (Denial of Service).
The weakness is caused due to an error in the Workstation service when handling NetrWkstaUserEnum RPC requests with a large value in the maxlen field.
Successful exploitation causes svchost.exe to consume a large amount of memory and may result in the system becoming temporarily unresponsive.
The weakness is confirmed on a fully patched Windows XP SP2 system and has also been reported in Windows 2000 SP4.
Solution:
Filter NetrWkstaUserEnum RPC requests with a large maxlen value.
Provided and/or discovered by:
h07
Changelog:
2006-12-27: Added CVE reference.
Original Advisory:
http://milw0rm.com/exploits/3013
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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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