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AUSCERT External Security Bulletin Redistribution
ESB-2008.0794 -- [Win]
MS08-049 - Vulnerabilities in Event System Could Allow
Remote Code Execution
13 August 2008
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AusCERT Security Bulletin Summary
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Product: Windows Event System
Publisher: Microsoft
Operating System: Windows Server 2008
Windows Server 2003
Windows Vista
Windows XP
Windows 2000
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
CVE Names: CVE-2008-1457 CVE-2008-1456
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms08-049.mspx
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Microsoft Security Bulletin MS08-049 - Important
Vulnerabilities in Event System Could Allow Remote Code Execution (950974)
Published: August 12, 2008
Version: 1.0
General Information
Executive Summary
This update resolves two privately reported vulnerabilities in
Microsoft Windows Event System that could allow remote code execution.
An attacker who successfully exploited these vulnerabilities could
take complete control of an affected system. An attacker could then
install programs; view, change, or delete data; or create new accounts
with full administrative rights.
This security update is rated Important for all supported editions of
Windows 2000, Windows XP, Windows Server 2003, Windows Vista, and
Windows Server 2008. For more information, see the subsection,
Affected Software, in this section.
Recommendation. Microsoft recommends that customers apply the update
at the earliest opportunity.
Affected Software
Microsoft Windows 2000 Service Pack 4
Windows XP Service Pack 2 and Windows XP Service Pack 3
Windows XP Professional x64 Edition and Windows XP Professional
x64 Edition Service Pack 2
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service
Pack 2
Windows Server 2003 x64 Edition and Windows Server 2003 x64
Edition Service Pack 2
Windows Server 2003 with SP1 for Itanium-based Systems and Windows
Server 2003 with SP2 for Itanium-based Systems
Windows Vista and Windows Vista Service Pack 1
Windows Vista x64 Edition and Windows Vista x64 Edition Service
Pack 1
Windows Server 2008 for 32-bit Systems
Windows Server 2008 for x64-based Systems
Windows Server 2008 for Itanium-based Systems
Vulnerability Information
Event System Vulnerability - CVE-2008-1457
A remote code execution vulnerability exists because the Microsoft
Windows Event System does not correctly validate user subscriptions
requests when created. The vulnerability could allow remote code
execution. An attacker who successfully exploited this vulnerability
could take complete control of an affected system. An attacker could
then install programs; view, change, or delete data; or create new
accounts with full administrative rights.
Workarounds for Event System Vulnerability - CVE-2008-1457
Unregister es.dll
Stop and disable the System Event Notification and COM+ Event System
services
Modify the Access Control List on es.dll
Event System Vulnerability - CVE-2008-1456
A remote code execution vulnerability exists because the Microsoft
Windows Event System does not correctly validate the range of indexes
when calling an array of function pointers. The vulnerability could
allow remote code execution. An attacker who successfully exploited
this vulnerability could take complete control of an affected system.
An attacker could then install programs; view, change, or delete data;
or create new accounts with full administrative rights.
Workarounds for Event System Vulnerability - CVE-2008-1456
Unregister es.dll
Stop and disable the System Event Notification and COM+ Event System
services
Modify the Access Control List on es.dll
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
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