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AUSCERT Security Bulletin
ASB-2009.1011
Microsoft Office Web Components: Execute arbitrary code
14 July 2009
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AusCERT Security Bulletin Summary
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Product: Microsoft Office XP Service Pack 3
Microsoft Office 2003 Service Pack 3
Microsoft Office XP Web Components Service Pack 3
Microsoft Office Web Components 2003 Service Pack 3
Microsoft Office 2003 Web Components for the 2007
Microsoft Office system Service Pack 1
Microsoft Internet Security and Acceleration Server
2004 Standard Edition Service Pack 3
Microsoft Internet Security and Acceleration Server
2004 Enterprise Edition Service Pack 3
Microsoft Internet Security and Acceleration Server
2006
Internet Security and Acceleration Server 2006
Supportability Update
Microsoft Internet Security and Acceleration Server
2006 Service Pack 1
Microsoft Office Small Business Accounting 2006
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2009-1136
Member content until: Thursday, August 13 2009
OVERVIEW
A vulnerability in Microsoft Office Web Components, which could
allow remote execution of arbitrary code, is currently being
investigated.
IMPACT
An ActiveX control used by Internet Explorer to display Excel
spreadsheets is vulnerable to a remote code execution attack, with
privileges of the user running IE. Active exploitation of this
vulnerability has been confirmed. [1, 2]
MITIGATION
Microsoft have provided a 'Fixit' workaround as well as instructions
to manually disable the ActiveX control. [3]
REFERENCES
[1] Vulnerability in Microsoft Office Web Components Control Could Allow Remote Code Execution
http://www.microsoft.com/technet/security/advisory/973472.mspx
[2] Vulnerability in Microsoft Office Web Components Control Could Allow Remote Code Execution
http://isc.sans.org/diary.html?storyid=6778&rss
[3] Microsoft Security Advisory: Vulnerability in Microsoft Office Web Components control could allow remote code execution
http://support.microsoft.com/kb/973472
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
http://www.auscert.org.au/render.html?it=3192
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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