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AUSCERT External Security Bulletin Redistribution
ESB-2009.1265
Vulnerability in DHTML Editing Component ActiveX Control
Could Allow Remote Code Execution
9 September 2009
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AusCERT Security Bulletin Summary
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Product: DHTML Editing Component ActiveX control
Publisher: Microsoft
Operating System: Windows 2000
Windows XP
Windows Server 2003
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2009-2519
Original Bulletin:
http://www.microsoft.com/technet/security/Bulletin/MS09-046.mspx
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Microsoft Security Bulletin MS09-046 - Critical
Vulnerability in DHTML Editing Component ActiveX Control Could Allow
Remote Code Execution (956844)
Published: September 08, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves a privately reported vulnerability in the DHTML
Editing Component ActiveX control. An attacker could exploit the vulnerability
by constructing a specially crafted Web page. When a user views the Web page,
the vulnerability could allow remote code execution. An attacker who
successfully exploited this vulnerability could gain the same user rights as
the logged-on user. Users whose accounts are configured to have fewer user
rights on the system could be less impacted than users who operate with
administrative user rights.
This security update is rated Critical for all supported editions of Microsoft
Windows 2000 and Windows XP and Moderate for all supported editions of Windows
Server 2003. For more information, see the subsection, Affected and
Non-Affected Software, in this section.
This security update addresses the vulnerability by revising the way that the
ActiveX control formats HTML markup. For more information about this vulnerability,
see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability
entry under the next section, Vulnerability Information.
Recommendation. The majority of customers have automatic updates enabled and will
not need to take any action because this security update will be downloaded and
installed automatically. Customers who have not enabled automatic updates need to
check for updates and install this update manually. For information about specific
configuration options in automatic updating, see Microsoft Knowledge Base Article
294871.
For administrators and enterprise installations, or end users who want to install
this security update manually, Microsoft recommends that customers apply the
update immediately using update management software, or by checking for updates
using the Microsoft Update service. See also the section, Detection and Deployment
Tools and Guidance, later in this bulletin.
Known Issues. None
Affected Software
Microsoft Windows 2000 Service Pack 4
Windows XP Service Pack 2 and 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
Vulnerability Information
DHTML Editing Component ActiveX Control Vulnerability - CVE-2009-2519
A remote code execution vulnerability exists in the DHTML Editing Component
ActiveX Control. An attacker could exploit the vulnerability by constructing
a specially crafted Web page. When a user views the Web page, the
vulnerability could allow remote code execution. An attacker who successfully
exploited this vulnerability could gain the same user rights as the logged-on
user.
If a user is logged on with administrative user rights, 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 user rights. Users whose accounts
are configured to have fewer user rights on the system could be less impacted
than users who operate with administrative user rights.
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