Windows Server Service Null Pointer Comparison Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1016606
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SecurityTracker URL: http://securitytracker.com/id?1016606
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CVE Reference: CVE-2006-3942
(Links to External Site)
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Updated: Oct 10 2006
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Original Entry Date: Jul 29 2006
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Impact: Denial of service via network
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Fix Available: Yes
Vendor Confirmed: Yes
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Advisory: Microsoft Security Bulletin
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Version(s): 2000 SP4, XP SP2, 2003 SP1; and prior service packs
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Description: A vulnerability was reported in the Windows Server service. A remote user can cause denial of service conditions.
A remote user can send a specially crafted SMB_COM_TRANSACTION SMB message (0x25) that includes a string that is not properly null
terminated to trigger a null pointer comparison in the server driver (srv.sys) and cause the target operating system to crash.
Microsoft
reports that the vulnerability was not addressed by the update described in Microsoft Security Bulletin MS06-035, but was unrelated
to that vulnerability. Microsoft also indicates that the vulnerability impact is limited to a denial of service and does not permit
remote code execution.
Gerardo Richarte from Core Security Technologies discovered this vulnerability. The advisory from Core
Security Technologies is available at:
http://www.coresecurity.com/common/showdoc.php?idx=562&idxseccion=10
Microsoft credits
NS Focus and Ivan Acre of Core Impact with reporting this vulnerability.
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Impact: A remote user can cause the target system to crash.
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Solution: The vendor has issued the following fixes:
Microsoft Windows 2000 Service Pack 4:
http://www.microsoft.com/downloads/details.aspx?FamilyId=2998105d-6796-4e60-8c9c-e8
241385f2a9
Microsoft Windows XP Service Pack 1 and Microsoft Windows XP Service Pack 2:
http://www.microsoft.com/downloads/details.aspx?FamilyId=08ab17b9-149c-44d4-
96cf-87a8c6b9dc22
Microsoft Windows XP Professional x64 Edition:
http://www.microsoft.com/downloads/details.aspx?FamilyId=433fd0f9-938f-432d-99d4-f41b92235dcf
Mi
crosoft Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1:
http://www.microsoft.com/downloads/details.aspx?FamilyId=abad4cc1-4ea6-4051-bc5a-79deb4db
e72b
Microsoft Windows Server 2003 for Itanium-based Systems and Microsoft Windows Server 2003 with SP1 for Itanium-based Systems:
http://www.microsoft.com/download
s/details.aspx?FamilyId=849eedef-332b-4792-b84e-3750d407a86f
Microsoft Windows Server 2003 x64 Edition:
http://www.microsoft.com/downloads/details.aspx?FamilyId=31e
448f7-298d-417c-a857-1646689e0817
A restart is required.
The Microsoft advisory is available at:
http://www.microsoft.com/technet/security/bulletin/ms06-063.mspx
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Vendor URL: www.microsoft.com/technet/security/bulletin/ms06-063.mspx (Links to External Site)
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Cause: State error
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Underlying OS: Windows (2000), Windows (2003), Windows (XP)
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Message History:
None.
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Source Message Contents
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Date: Sat, 29 Jul 2006 00:47:38 -0400
Subject: Microsoft Windows Server Service denial of service
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.. a vulnerability that was not addressed in by this months MS06-035 security update ...
http://blogs.technet.com/msrc/archive/2006/07/28/443837.aspx
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