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AUSCERT External Security Bulletin Redistribution
ESB-2009.1507
Vulnerabilities in Windows Kernel-Mode Drivers Could Allow
Remote Code Execution
11 November 2009
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AusCERT Security Bulletin Summary
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Product: Windows Kernel-Mode Drivers
Publisher: Microsoft
Operating System: Windows
Impact/Access: Administrator Compromise -- Remote with User Interaction
Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2009-2514 CVE-2009-2513 CVE-2009-1127
Original Bulletin:
http://www.microsoft.com/technet/security/Bulletin/MS09-065.mspx
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Microsoft Security Bulletin MS09-065 - Critical
Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Remote Code
Execution (969947)
Published: November 10, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves several privately reported vulnerabilities
in the Windows kernel. The most severe of the vulnerabilities could allow
remote code execution if a user viewed content rendered in a specially
crafted Embedded OpenType (EOT) font. In a Web-based attack scenario, an
attacker would have to host a Web site that contains specially crafted
embedded fonts that are used to attempt to exploit this vulnerability. In
addition, compromised Web sites and Web sites that accept or host
user-provided content could contain specially crafted content that could
exploit this vulnerability. An attacker would have no way to force users
to visit a specially crafted Web site. Instead, an attacker would have to
convince the user to visit the Web site, typically by getting them to
click a link in an e-mail message or Instant Messenger message that takes
the user to the attacker's site.
This security update is rated Critical for all supported editions of
Microsoft Windows 2000, Windows XP, and Windows Server 2003, and Important
for all supported editions of Windows Vista and Windows Server 2008. For
more information, see the subsection, Affected and Non-Affected Software,
in this section.
The security update addresses the vulnerabilities by correcting the method
used for validating the argument passed to the system call, validating
input passed from user mode through the kernel component of GDI, and
correcting the manner in which Windows kernel-mode drivers parse font code.
For more information about the vulnerabilities, see the Frequently Asked
Questions (FAQ) subsection for the specific vulnerability entry under the
next section, Vulnerability Information.
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
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
Vulnerability Information
Win32k NULL Pointer Dereferencing Vulnerability - CVE-2009-1127
An elevation of privilege vulnerability exists because the Windows kernel
does not properly validate an argument passed to a Windows kernel system
call. An attacker who successfully exploited this vulnerability could run
arbitrary code in kernel mode. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user rights.
Win32k Insufficient Data Validation Vulnerability - CVE-2009-2513
An elevation of privilege vulnerability exists in Windows kernel-mode
drivers due to improper validation of input passed from user mode through
the kernel component of GDI. An attacker who successfully exploited this
vulnerability could run arbitrary code in kernel mode. An attacker could
then install programs; view, change, or delete data; or create new accounts
with full user rights.
Win32k EOT Parsing Vulnerability - CVE-2009-2514
A remote code execution vulnerability exists in the Windows kernel-mode
drivers due to the improper parsing of font code when building a table of
directory entries. An attacker who successfully exploited this
vulnerability could run arbitrary code in kernel mode. An attacker could
then install programs; view, change, or delete data; or create new accounts
with full user rights.
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