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AUSCERT External Security Bulletin Redistribution
ESB-2009.1176
Vulnerabilities in Microsoft Active Template Library (ATL)
Could Allow Remote Code Execution (973908)
12 August 2009
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Outlook Express 5.5 and 6
Windows Media Player 9, 10 and 11
DHTML Editing Component ActiveX Control
Microsoft MSWebDVD ActiveX Control
Windows ATL Component
Publisher: Microsoft
Operating System: Windows 2000
Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Mitigation
CVE Names: CVE-2009-2494 CVE-2009-2493 CVE-2009-0901
CVE-2008-0020 CVE-2008-0015
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms09-037.mspx
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Microsoft Security Bulletin MS09-037 - Critical
Vulnerabilities in Microsoft Active Template Library (ATL) Could Allow
Remote Code Execution (973908)
Published: August 11, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves several privately reported
vulnerabilities in Microsoft Active Template Library (ATL). The
vulnerabilities could allow remote code execution if a user loaded a
specially crafted component or control hosted on a malicious website.
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 Service Pack 4, Windows XP, Windows Server
2003, Windows Vista, and Windows Server 2008. For more information on
the software affected by this update, see the subsection, Affected and
Non-Affected Software, in this section. For more information on the
impact of, and workarounds and mitigations for controls and components
that may be vulnerable to these issues, please see [22]Microsoft
Security Advisory (973882).
The security update addresses the vulnerabilities by modifying the ATL
headers so that components and controls built using the headers can
safely initialize from a data stream, and by providing updated
versions of Windows components and controls built using corrected ATL
headers. For more information about the vulnerabilities, 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 updating
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 updating 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.
Known Issues. None
Affected Software
Microsoft Windows 2000:
Microsoft Outlook Express 5.5 Service Pack 2 (KB973354)
Microsoft Outlook Express 6 Service Pack 1 (KB973354)
Windows Media Player 9 (KB973540)
DHTML Editing Component ActiveX Control (KB973869)
Windows XP:
Microsoft Outlook Express 6 (KB973354)
Windows Media Player 9, Windows Media Player 10, and Windows Media
Player 11 (KB973540)
Windows ATL Component (KB973507)
DHTML Editing Component ActiveX Control (KB973869)
Microsoft MSWebDVD ActiveX Control (KB973815)
Windows Server 2003:
Microsoft Outlook Express 6 (KB973354)
Windows Media Player 10 (KB973540)
Windows ATL Component (KB973507)
DHTML Editing Component ActiveX Control (KB973869)
Microsoft MSWebDVD ActiveX Control (KB973815)
Windows Vista:
Windows Media Player 11 (KB973540)
Windows ATL Component (KB973507)
Windows Server 2008:
Windows Media Player 11 (KB973540)
Windows ATL Component (KB973507)
Vulnerability Information
Microsoft Video ActiveX Control Vulnerability - CVE-2008-0015
A remote code execution vulnerability exists in the Microsoft Active
Template Library (ATL) due to the function CComVariant::ReadFromStream
used in the ATL header. This function does not properly restrict
untrusted data read from a stream. This issue leads to reading data
directly onto the stack instead of reading it into the area of memory
allocated for an array, which could allow a remote, unauthenticated
user to perform remote code execution on an affected system. 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.
ATL Header Memcopy Vulnerability - CVE-2008-0020
A remote code execution vulnerability exists in the Microsoft Active
Template Library (ATL) due to an error in the Load method of the
IPersistStreamInit interface. The Load method could allow calls to
memcopy with untrusted data, which could allow a remote,
unauthenticated user to perform remote code execution on an affected
system. 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.
ATL Uninitialized Object Vulnerability - CVE-2009-0901
A remote code execution vulnerability exists in the Microsoft Active
Template Library (ATL) due to a bug in the ATL headers that could
allow an attacker to force VariantClear to be called on a VARIANT that
has not been correctly initialized. Because of this bug, the attacker
can control what happens when VariantClear is called during handling
of an error by supplying a corrupt stream. This vulnerability only
directly affects systems with components and controls installed that
were built using Visual Studio ATL. This vulnerability could allow a
remote, unauthenticated user to perform remote code execution on an
affected system. 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.
ATL COM Initialization Vulnerability - CVE-2009-2493
A remote code execution vulnerability exists in the Microsoft Active
Template Library (ATL) due to bugs in the ATL headers that handle
instantiation of an object from data streams. This vulnerability only
directly affects systems with components and controls installed that
were built using Visual Studio ATL. For components and controls built
using ATL, unsafe usage of OleLoadFromStream could allow the
instantiation of arbitrary objects which can bypass related security
policy, such as kill bits within Internet Explorer. This vulnerability
could allow a remote, unauthenticated user to perform remote code
execution on an affected system. 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.
ATL Object Type Mismatch Vulnerability - CVE-2009-2494
A remote code execution vulnerability exists in the Microsoft Active
Template Library (ATL) due to a bug in the ATL header that could allow
reading a variant from a stream and leaving the variant type read with
an invalid variant. When deleting the variant, it is possible to free
unintended areas in memory that could be controlled by an attacker.
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