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AUSCERT External Security Bulletin Redistribution
ESB-2009.1048
Vulnerabilities in the Embedded OpenType Font Engine Could
Allow Remote Code Execution (961371)
15 July 2009
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AusCERT Security Bulletin Summary
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Product: Embedded OpenType Font Engine
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch
CVE Names: CVE-2009-0232 CVE-2009-0231
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/MS09-029.mspx
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Microsoft Security Bulletin MS09-029 - Critical
Vulnerabilities in the Embedded OpenType Font Engine Could Allow Remote Code
Execution (961371)
Published: July 14, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves two privately reported vulnerabilities in a
Microsoft Windows component, the Embedded OpenType (EOT) Font Engine. The
vulnerabilities could allow remote code execution. An attacker who
successfully exploited either of these vulnerabilities could take
completed control of an affected system remotely. 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.
This security update is rated Critical for all supported editions of
Microsoft Windows 2000, Windows XP, Windows Server 2003, Windows Vista,
and Windows Server 2008. For more information, see the subsection,
Affected and Non-Affected Software, in this section.
The update addresses the vulnerability by correcting the way that the
Microsoft Windows EOT component parses files and content containing
embedded fonts. 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.
Affected Software
Microsoft Windows 2000 Service Pack 4
Windows XP Service Pack 2
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, Windows Vista Service Pack 1, and Windows Vista Service
Pack 2
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and
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 Server 2008 for Itanium-based Systems and Windows Server 2008 for
Itanium-based Systems Service Pack 2
*Windows Server 2008 server core installation not affected. The
vulnerability addressed by this update does not affect supported editions
of Windows Server 2008 if Windows Server 2008 was installed using the
Server Core installation option. For more information on this
installation option, see Server Core. Note that the Server Core
installation option does not apply to certain editions of Windows Server
2008; see Compare Server Core Installation Options.
Vulnerability Information
Embedded OpenType Font Heap Overflow Vulnerability - CVE-2009-0231
A remote code execution vulnerability exists in the way that Microsoft
Windows Embedded OpenType (EOT) font technology parses data records in
specially crafted embedded fonts. 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.
Embedded OpenType Font Integer Overflow Vulnerability - CVE-2009-0232
A remote code execution vulnerability exists in the way that Microsoft
Windows Embedded OpenType (EOT) font technology parses name tables in
specially crafted embedded fonts. 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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