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AUSCERT External Security Bulletin Redistribution
ESB-2015.0976
Microsoft Security Bulletin MS15-035 - Critical
15 April 2015
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AusCERT Security Bulletin Summary
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Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2015-1645
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS15-035
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Microsoft Security Bulletin MS15-035 - Critical
Vulnerability in Microsoft Graphics Component Could Allow Remote Code
Execution (3046306)
Published: April 14, 2015
Version: 1.0
Executive Summary
This security update resolves a vulnerability in Microsoft Windows. The
vulnerability could allow remote code execution if an attacker successfully
convinces a user to browse to a specially crafted website, open a specially
crafted file, or browse to a working directory that contains a specially
crafted Enhanced Metafile (EMF) image file. In all cases, however, an attacker
would have no way to force users to take such actions; an attacker would have
to convince users to do so, typically by way of enticements in email or
Instant Messenger messages.
This security update is rated Critical for all supported editions of Windows
Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows Server
2008 R2. For more information, see the Affected Software section.
Affected Software
Windows Server 2003
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 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems Service Pack 2
Windows 7
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
Server Core installation option
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Vulnerability Information
EMF Processing Remote Code Execution Vulnerability - CVE-2015-1645
A remote code execution vulnerability exists in the way that Microsoft Windows
improperly processes certain, specially crafted Enhanced Metafile (EMF) image
format files. An attacker who successfully exploited the vulnerability could
run arbitrary code as the logged-on user. An attacker could then install
programs; view, change, or delete data; or create new accounts with full user
rights. If a user is logged on with administrative user rights, an attacker
could take complete control of the affected system. 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.
In a web-based attack scenario, an attacker could host a specially crafted
website that is designed to exploit the vulnerability through Internet
Explorer and then convince users to view the website. This could also include
compromised websites or websites that accept or host user-provided content or
banner advertisements; such websites could contain specially crafted content
that is designed to exploit the vulnerability. In all cases, however, an
attacker would have no way to force users to visit such websites. Instead, an
attacker would have to convince users to do so, typically by getting them to
click a link in an email or Instant Messenger request.
In an email attack scenario, an attacker could exploit the vulnerability by
sending Outlook users a specially crafted email, or sending them a specially
crafted Office document as an attachment, and convincing the user to read the
message or open the file.
An attacker could also exploit this vulnerability by hosting a malicious image
file on a network share and convincing users to navigate to the folder in
Windows Explorer.
The security update addresses the vulnerability by correcting how Windows
processes EMF files.
Microsoft received information about this vulnerability through coordinated
vulnerability disclosure. When this security bulletin was issued, Microsoft
had not received any information to indicate that this vulnerability had been
publicly used to attack customers.
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