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AUSCERT External Security Bulletin Redistribution
ESB-2010.0832
Vulnerability in Local Security Authority Subsystem Service
Could Allow Elevation of Privilege
15 September 2010
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AusCERT Security Bulletin Summary
---------------------------------
Product: Active Directory
Active Directory Application Mode
Active Directory Lightweight Directory Service
Publisher: Microsoft
Operating System: Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2010-0820
Original Bulletin:
http://www.microsoft.com/technet/security/Bulletin/MS10-068.mspx
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Microsoft Security Bulletin MS10-068 - Important
Vulnerability in Local Security Authority Subsystem Service Could Allow
Elevation of Privilege (983539)
Version: 1.0
General Information
Executive Summary
This security update resolves a privately reported vulnerability in Active
Directory, Active Directory Application Mode (ADAM), and Active Directory
Lightweight Directory Service (AD LDS). The vulnerability could allow elevation
of privilege if an authenticated attacker sent specially crafted Lightweight
Directory Access Protocol (LDAP) messages to a listening LSASS server. In
order to successfully exploit this vulnerability, an attacker must have a
member account within the target Windows domain. However, the attacker does
not need to have a workstation joined to the Windows domain.
This security update is rated Important for Active Directory, ADAM, and AD
LDS when installed on supported editions of Windows XP, Windows Server 2003,
Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2.
For more information, see the subsection, Affected and Non-Affected Software,
in this section.
The security update addresses the vulnerability by correcting the manner in
which the Local Security Authority Subsystem Service (LSASS) handles certain
LDAP messages. For more information about the vulnerability, see the
Frequently Asked Questions (FAQ) subsection for the specific vulnerability
entry under the next section, Vulnerability Information.
Affected Software
Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit
Systems Service Pack 2
Windows Server 2008 for x64-based Systems and Windows Server 2008 for
x64-based Systems Service Pack 2
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems
Vulnerability Information
LSASS Heap Overflow Vulnerability - CVE-2010-0820
An authenticated elevation of privilege vulnerability exists in Microsoft
Windows due to the way that the Local Security Authority Subsystem Service
(LSASS) improperly handles certain Lightweight Directory Access Protocol
(LDAP) messages. The vulnerability exists in implementations of Active
Directory, Active Directory Application Mode (ADAM), and Active Directory
Lightweight Directory Service (AD LDS). An attacker must have previously
authenticated with the LSASS server prior to exploiting this issue. An
attacker who successfully exploited this vulnerability could execute
arbitrary code and take complete control of an affected system. An attacker
could then install programs; view, change, or delete data; or create new
accounts with full user rights.
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