TITLE:
Microsoft Windows Kernel and LSASS Privilege Escalation
Vulnerabilities

SECUNIA ADVISORY ID:
SA13465

VERIFY ADVISORY:
http://secunia.com/advisories/13465/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

OPERATING SYSTEM:
Microsoft Windows 2000 Advanced Server
http://secunia.com/product/21/
Microsoft Windows 2000 Datacenter Server
http://secunia.com/product/1177/
Microsoft Windows 2000 Professional
http://secunia.com/product/1/
Microsoft Windows 2000 Server
http://secunia.com/product/20/
Microsoft Windows NT 4.0 Server
http://secunia.com/product/18/
Microsoft Windows NT 4.0 Server, Terminal Server Edition
http://secunia.com/product/19/
Microsoft Windows Server 2003 Datacenter Edition
http://secunia.com/product/1175/
Microsoft Windows Server 2003 Enterprise Edition
http://secunia.com/product/1174/
Microsoft Windows Server 2003 Standard Edition
http://secunia.com/product/1173/
Microsoft Windows Server 2003 Web Edition
http://secunia.com/product/1176/
Microsoft Windows XP Home Edition
http://secunia.com/product/16/
Microsoft Windows XP Professional
http://secunia.com/product/22/

DESCRIPTION:
Cesar Cerrudo has reported two vulnerabilities in Microsoft Windows,
allowing malicious, local users to escalate their privileges.

1) The vulnerability is caused due to an unchecked buffer in the
handling of data sent through a LPC (Local Procedure Call) port. This
can be exploited to cause a buffer overflow and lead to execution of
arbitrary code with elevated privileges.

2) The vulnerability is caused due to an error in the validation of
identity tokens in LSASS (Local Security Authority Subsystem
Service). This can be exploited to gain elevated privileges.

SOLUTION:
Apply patches.

Microsoft Windows NT Server 4.0 (requires Service Pack 6a):
http://www.microsoft.com/downloads/details.aspx?FamilyId=325EAA8F-AF09-4839-B9E8-BB218C7A8564

Microsoft Windows NT Server 4.0 Terminal Server Edition (requires
Service Pack 6):
http://www.microsoft.com/downloads/details.aspx?FamilyId=9823A61F-C69F-403A-BD6A-EF3984BFA2B8

Microsoft Windows 2000 (requires Service Pack 3 or Service Pack 4):
http://www.microsoft.com/downloads/details.aspx?FamilyId=EFDEA122-DDA4-40B8-A7AF-9DDCC3870C38

Microsoft Windows XP (requires Service Pack 1 or Service Pack 2):
http://www.microsoft.com/downloads/details.aspx?FamilyId=27115D5C-3E4A-4F41-B81E-376AA1CD204F

Microsoft Windows XP 64-Bit Edition (requires Service Pack 1):
http://www.microsoft.com/downloads/details.aspx?FamilyId=1649AE1E-0ABF-4D31-BE12-3982C5146AE8

Microsoft Windows XP 64-Bit Edition Version 2003
http://www.microsoft.com/downloads/details.aspx?FamilyId=95849AB9-36BF-4A90-BC37-3B4FB6DCDF9A

Microsoft Windows Server 2003
http://www.microsoft.com/downloads/details.aspx?FamilyId=AACB97CB-E8F0-461F-B2D2-F1065229B64E

Microsoft Windows Server 2003 64-Bit Edition
http://www.microsoft.com/downloads/details.aspx?FamilyId=95849AB9-36BF-4A90-BC37-3B4FB6DCDF9A

PROVIDED AND/OR DISCOVERED BY:
Cesar Cerrudo, Application Security

ORIGINAL ADVISORY:
MS04-044 (KB885835):
http://www.microsoft.com/technet/security/bulletin/ms04-044.mspx

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