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                                    CERT-Renater

                         Note d'Information No. 2008/VULN118
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DATE                      : 09/04/2008

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running Microsoft Visio.

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http://www.microsoft.com/technet/security/Bulletin/MS08-019.mspx
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MS08-019 Vulnerabilities in Microsoft Visio Could Allow Remote
          Code Execution

This security update resolves privately reported vulnerabilities in
Microsoft Office Visio that could allow remote code execution if a user
opens a specially crafted Visio file. 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.

This security update is rated Important for Microsoft Office Visio 2002
Service Pack 2, Microsoft Office Visio 2003 Service Pack 2, Microsoft
Office Visio 2003 Service Pack 3, Microsoft Office Visio 2007, and
Microsoft Office Visio 2007 Service Pack 1.

This security update addresses these vulnerabilities by modifying the way
that Microsoft Visio performs validations when opening Visio files.

Microsoft recommends that customers apply the update at the earliest
opportunity.

Affected Software
    o Microsoft Visio 2007 Service Pack 1
    o Microsoft Visio 2007
    o Microsoft Visio 2003 Service Pack 3
    o Microsoft Visio 2003 Service Pack 2
    o Microsoft Visio 2002 Service Pack 2

Non-Affected Software
    o Microsoft Visio 2007 Viewer Service Pack 1
    o Microsoft Visio 2007 Viewer
    o Microsoft Visio 2003 Viewer
    o Microsoft Visio 2002 Viewer

Vulnerability Information

Visio Object Header Vulnerability CVE-2008-1089

A remote code execution vulnerability exists in the way Microsoft Visio
validates object header data in specially crafted files. An attacker could
exploit the vulnerability by sending a malformed file which could be
included as an e-mail attachment, or hosted on a specially crafted or
compromised Web site.

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.

Visio Memory Validation Vulnerability - CVE-2008-1090

A remote code execution vulnerability exists in the way Microsoft Visio
validates memory allocations when loading specially-crafted .DXF files
from disk into memory. An attacker could exploit the vulnerability by
sending a malformed file which could be included as an e-mail attachment,
or hosted on a specially crafted or compromised Web site.

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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