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Microsoft Windows LSASS Buffer Overrun Vulnerability

Risk
High

Date Discovered
04-13-2004

Description
Microsoft Windows LSASS (Local Security Authority Subsystem Service) is prone to a remotely exploitable buffer overrun vulnerability. Successful exploitation of this issue could allow a remote attacker to execute malicious code on a vulnerable system, resulting in full system compromise.

This issue could be exploited by an anonymous user on Microsoft Windows 2000 and XP operating systems. The issue may reportedly only be exploited by local, authenticated users on Microsoft Windows Server 2003 and Microsoft Windows XP 64-Bit Edition 2003.

Symantec ManHunt 3.0
As of April 13, 2004, users of Symantec Manhunt 3.0 can update to Security Update 22 to detect attempts to exploit this vulnerability. Click here for more information.

Symantec Vulnerability Assessment
Symantec Vulnerability Assessment detects and reports this vulnerability. Click here for the advisory released April 13, 2004.

Symantec Enterprise Security Manager
Symantec Enterprise Security Manager™ posted an update to the OS Patch Policy that detects and reports systems that are not patched against this vulnerability. Click here for the advisory released April 13, 2004.

AntiVirus Products
A heuristic detection has been released to detect possible exploits of this vulnerability. Symantec Antivirus products will detect files which contain code to exploit this vulnerability as Bloodhound.Exploit.8.

Platforms Affected
Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Datacenter Server SP1
Microsoft Windows 2000 Datacenter Server SP2
Microsoft Windows 2000 Server
Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Terminal Services
Microsoft Windows 2000 Terminal Services SP1
Microsoft Windows 2000 Terminal Services SP2

Components Affected
Microsoft Windows 2000 Advanced Server SP4
Microsoft Windows 2000 Advanced Server SP3
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Datacenter Server SP4
Microsoft Windows 2000 Datacenter Server SP3
Microsoft Windows 2000 Datacenter Server SP2
Microsoft Windows 2000 Datacenter Server SP1
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Professional SP4
Microsoft Windows 2000 Professional SP3
Microsoft Windows 2000 Professional SP2
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Server SP4
Microsoft Windows 2000 Server SP3
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server
Microsoft Windows Server 2003 Datacenter Edition
Microsoft Windows Server 2003 Datacenter Edition 64-bit
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Enterprise Edition 64-bit
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Web Edition
Microsoft Windows XP 64-bit Edition SP1
Microsoft Windows XP 64-bit Edition
Microsoft Windows XP 64-bit Edition Version 2003 SP1
Microsoft Windows XP 64-bit Edition Version 2003
Microsoft Windows XP Home SP1
Microsoft Windows XP Home
Microsoft Windows XP Professional SP1
Microsoft Windows XP Professional

Recommendations
Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.
Local attack vectors are reported to exist for this vulnerability. Do not permit untrusted individuals to have interactive access to the system. This will reduce exposure to privilege escalation attacks via this or other latent vulnerabilities.

Block external access at the network boundary, unless service is required by external parties.
Use multiple layers of network access control to regulate external or untrusted network traffic. This will help to limit exposure to exploitation of this and other latent vulnerabilities. This includes blocking RPC ports such as UDP ports 135-139 and 445 and TCP ports 138-139, 445 and 593.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy network intrusion detection systems to monitor network traffic for anomalous or suspicious activity. This may help in detecting attack attempts or activity that is the result of successful exploitation of this or other latent vulnerabilities.

Microsoft has released fixes to address this issue:


Microsoft Windows 2000 Advanced Server SP4:

Microsoft Patch Security Update for Windows 2000 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=0692C27E-F63A-414C-B3EB-D2342FBB6C00&displaylang=en

Microsoft Windows 2000 Advanced Server SP3:
Microsoft Patch Security Update for Windows 2000 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=0692C27E-F63A-414C-B3EB-D2342FBB6C00&displaylang=en

Microsoft Windows 2000 Advanced Server SP2:
Microsoft Patch Security Update for Windows 2000 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=0692C27E-F63A-414C-B3EB-D2342FBB6C00&displaylang=en

Microsoft Windows 2000 Advanced Server SP1:
Microsoft Windows 2000 Advanced Server :
Microsoft Windows 2000 Datacenter Server SP4:
Microsoft Windows 2000 Datacenter Server SP3:
Microsoft Windows 2000 Datacenter Server SP2:
Microsoft Windows 2000 Datacenter Server SP1:
Microsoft Windows 2000 Datacenter Server :
Microsoft Windows 2000 Professional SP4:
Microsoft Patch Security Update for Windows 2000 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=0692C27E-F63A-414C-B3EB-D2342FBB6C00&displaylang=en

Microsoft Windows 2000 Professional SP3:
Microsoft Patch Security Update for Windows 2000 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=0692C27E-F63A-414C-B3EB-D2342FBB6C00&displaylang=en

Microsoft Windows 2000 Professional SP2:
Microsoft Patch Security Update for Windows 2000 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=0692C27E-F63A-414C-B3EB-D2342FBB6C00&displaylang=en

Microsoft Windows 2000 Professional SP1:
Microsoft Windows 2000 Professional :
Microsoft Windows 2000 Server SP4:
Microsoft Patch Security Update for Windows 2000 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=0692C27E-F63A-414C-B3EB-D2342FBB6C00&displaylang=en

Microsoft Windows 2000 Server SP3:
Microsoft Patch Security Update for Windows 2000 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=0692C27E-F63A-414C-B3EB-D2342FBB6C00&displaylang=en

Microsoft Windows 2000 Server SP2:
Microsoft Patch Security Update for Windows 2000 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=0692C27E-F63A-414C-B3EB-D2342FBB6C00&displaylang=en

Microsoft Windows 2000 Server SP1:
Microsoft Windows 2000 Server :
Microsoft Windows Server 2003 Datacenter Edition :
Microsoft Windows Server 2003 Datacenter Edition 64-bit :
Microsoft Windows Server 2003 Enterprise Edition :
Microsoft Patch Security Update for Windows Server 2003 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=EAB176D0-01CF-453E-AE7E-7495864E8D8C&displaylang=en

Microsoft Windows Server 2003 Enterprise Edition 64-bit :
Microsoft Patch Security Update for Windows Server 2003 64 Bit Edition and Windows XP 64 Bit Edition Version 2003 (
http://www.microsoft.com/downloads/details.aspx?FamilyId=C207D372-E883-44A6-A107-6CD2D29FC6F5&displaylang=en

Microsoft Windows Server 2003 Standard Edition :
Microsoft Patch Security Update for Windows Server 2003 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=EAB176D0-01CF-453E-AE7E-7495864E8D8C&displaylang=en

Microsoft Windows Server 2003 Web Edition :
Microsoft Patch Security Update for Windows Server 2003 (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=EAB176D0-01CF-453E-AE7E-7495864E8D8C&displaylang=en

Microsoft Windows XP 64-bit Edition SP1:
Microsoft Patch Security Update for Windows XP 64 Bit Edition (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=C6B55EF2-D9FE-4DBE-AB7D-73A20C82FF73&displaylang=en

Microsoft Windows XP 64-bit Edition :
Microsoft Windows XP 64-bit Edition Version 2003 SP1:
Microsoft Patch Security Update for Windows Server 2003 64 Bit Edition and Windows XP 64 Bit Edition Version 2003 (
http://www.microsoft.com/downloads/details.aspx?FamilyId=C207D372-E883-44A6-A107-6CD2D29FC6F5&displaylang=en

Microsoft Windows XP 64-bit Edition Version 2003 :
Microsoft Patch Security Update for Windows Server 2003 64 Bit Edition and Windows XP 64 Bit Edition Version 2003 (
http://www.microsoft.com/downloads/details.aspx?FamilyId=C207D372-E883-44A6-A107-6CD2D29FC6F5&displaylang=en

Microsoft Windows XP Home SP1:
Microsoft Patch Security Update for Windows XP (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=3549EA9E-DA3F-43B9-A4F1-AF243B6168F3&displaylang=en

Microsoft Windows XP Home :
Microsoft Patch Security Update for Windows XP (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=3549EA9E-DA3F-43B9-A4F1-AF243B6168F3&displaylang=en

Microsoft Windows XP Professional SP1:
Microsoft Patch Security Update for Windows XP (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=3549EA9E-DA3F-43B9-A4F1-AF243B6168F3&displaylang=en

Microsoft Windows XP Professional :
Microsoft Patch Security Update for Windows XP (KB835732)
http://www.microsoft.com/downloads/details.aspx?FamilyId=3549EA9E-DA3F-43B9-A4F1-AF243B6168F3&displaylang=en

References
Source: Microsoft Security Bulletin MS04-011
URL: http://www.microsoft.com/technet/security/bulletin/ms04-011.mspx

Source: Windows Local Security Authority Service Remote Buffer Overflow
URL: http://www.eeye.com/html/Research/Advisories/AD20040413C.html

Credits
Discovery is credited to eEye Digital Security.


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Disclaimer
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