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AUSCERT External Security Bulletin Redistribution
ESB-2010.0344
Vulnerability in Microsoft Office Publisher Could Allow
Remote Code Execution
14 April 2010
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AusCERT Security Bulletin Summary
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Product: Microsoft Office Publisher
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2010-0479
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms10-023.mspx
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Microsoft Security Bulletin (981160)
Vulnerability in Microsoft Office Publisher Could Allow Remote Code Execution
Published: April 13, 2010
Version: 1.0
General Information
Executive Summary
This security update resolves a privately reported vulnerability in Microsoft
Office Publisher that could allow remote code execution if a user opens a
specially crafted Publisher file. An attacker who successfully exploited this
vulnerability could gain the same user rights as the local 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 Important for supported versions of Microsoft
Office Publisher 2002, Microsoft Office Publisher 2003, and Microsoft Office
Publisher 2007.
The update addresses the vulnerability by correcting the way that Microsoft
Office Publisher opens specially crafted Publisher files.
Recommendation: Microsoft recommends that customers apply the update at the
earliest opportunity.
Known Issues: Microsoft Knowledge Base Article 981160 documents the currently
known issues that customers may experience when installing this security
update. The article also documents recommended solutions for these issues.
When currently known issues and recommended solutions pertain only to specific
releases of this software, this article provides links to further articles.
Affected Software
Microsoft Office XP Service Pack 3
Microsoft Office 2003 Service Pack 3
2007 Microsoft Office System Service Pack 1
2007 Microsoft Office System Service Pack 2
Mitigating Factors
The vulnerability cannot be exploited automatically through e-mail. For an
attack to be successful a user must open an attachment that is sent in an
e-mail message.
An attacker who successfully exploited this vulnerability could gain the same
user rights as the local 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.
In a Web-based attack scenario, an attacker could host a Web site that
contains a Web page that is used to exploit this vulnerability. In addition,
compromised Web sites and Web sites that accept or host user-provided content
or advertisements could contain specially crafted content that could exploit
this vulnerability. In all cases, however, an attacker would have no way to
force users to visit these Web sites. Instead, an attacker would have to
convince users to visit the Web site, typically by getting them to click a
link in an e-mail message or Instant Messenger message that takes users to
the attackers Web site, and then convince them to open the specially crafted
Publisher file.
Microsoft Office Publisher 2002 and later versions prompt a user to Open,
Save, or Cancel before opening a document. This is a mitigating factor
because the vulnerability requires more than a single user action to complete
the exploit.
Workarounds
Do not open Publisher files that you receive from untrusted sources or that
you receive unexpectedly from trusted sources. This vulnerability could be
exploited when a user opens a specially crafted file.
Vulnerability Information
Microsoft Office Publisher File Conversion TextBox Processing Buffer Overflow
Vulnerability - CVE-2010-0479
A remote code execution vulnerability exists in the way that Microsoft Office
Publisher opens Publisher files. An attacker could exploit the vulnerability
by creating a specially crafted Publisher file that could be included as an
e-mail attachment, or hosted on a specially crafted or compromised Web site,
and then convincing the user to open the specially crafted Publisher file.
If a user were 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
affected than users who operate with administrative user rights.
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