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                             CERT-Renater

                  Note d'Information No. 2012/VULN482
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DATE                : 12/12/2012

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S) : Systems running Microsoft Word versions 2003,
                        2007, 2010,
                      Microsoft Word Viewer,
                      Microsoft Office Compatibility Pack.

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KB2780642
http://technet.microsoft.com/en-us/security/bulletin/ms12-079
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Microsoft Security Bulletin MS12-079 - Critical Vulnerability in
Microsoft Word Could Allow Remote Code Execution (2780642)

Published Date: December 11, 2012

Version: 1.0


General Information

Executive Summary

This security update resolves a privately reported vulnerability in
Microsoft Office. The vulnerability could allow remote code execution
if a user opens a specially crafted RTF file using an affected version
of Microsoft Office software, or previews or opens a specially crafted
RTF email message in Outlook while using Microsoft Word as the email
viewer. An attacker who successfully exploited the vulnerability could
gain the same user rights as the current 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 Critical for all supported editions of
Microsoft Word 2010 and Microsoft Word 2007. This security update is
also rated Important for all supported editions of Microsoft Word 2003,
and all supported versions of Microsoft Word Viewer, Microsoft Office
Compatibility Pack, and Microsoft Office Web Apps.


Affected Software

Microsoft Word 2003 Service Pack 3
Microsoft Word 2007 Service Pack 2[1]
Microsoft Word 2007 Service Pack 3[1]
Microsoft Word 2010 Service Pack 1 (32-bit editions)
Microsoft Word 2010 Service Pack 1 (64-bit editions)
Microsoft Word Viewer
Microsoft Office Compatibility Pack Service Pack 2
Microsoft Office Compatibility Pack Service Pack 3

[1]For Microsoft Office Word 2007, in addition to security update
package KB2760421, customers also need to install the security update
for Microsoft Office Compatibility Pack (KB2760416) to be protected from
the vulnerability
described in this bulletin.


Vulnerability Information

Word RTF 'listoverridecount' Remote Code Execution Vulnerability -
CVE-2012-2539

A remote code execution vulnerability exists in the way that affected
Microsoft Office software parses specially crafted Rich Text Format
(RTF) data. 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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