Date: 25 August 2008
References: ESB-2008.0813
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A U S C E R T A L E R T
AL-2008.0090 -- AUSCERT ALERT
[Win][Mac][OSX]
MS08-051 - Vulnerabilities in Microsoft PowerPoint Could
Allow Remote Code Execution
25 August 2008
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AusCERT Alert Summary
---------------------
Product: Microsoft Office PowerPoint 2007 Service Pack 1
Microsoft Office PowerPoint 2007
Microsoft Office PowerPoint 2003 Service Pack 3
Microsoft Office PowerPoint 2003 Service Pack 2
Microsoft Office PowerPoint 2002 Service Pack 3
Microsoft Office PowerPoint 2000 Service Pack 3
Microsoft Office PowerPoint Viewer 2003
Microsoft Office Compatibility Pack for Word, Excel,
and PowerPoint 2007 File Formats
Microsoft Office Compatibility Pack for Word, Excel,
and PowerPoint 2007 File Formats Service Pack 1
Microsoft Office 2004 for Mac
Publisher: Microsoft
Operating System: Windows
Mac OS X
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
CVE Names: CVE-2008-1455 CVE-2008-0121 CVE-2008-0120
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms08-051.mspx
Comment: Microsoft have updated this advisory stating:
"Customers who manually installed Version 1 of this update from
Microsoft Download Center need to reinstall Version 2 of this
update. Customers who have installed this update using Microsoft
Update or Office Update do not need to reinstall."
Revision History: August 25 2008: Added comment regarding v2 of the
update patch
August 13 2008: Initial Release
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Microsoft Security Bulletin MS08-051 - Critical
Vulnerabilities in Microsoft PowerPoint Could Allow Remote Code Execution
(949785)
Published: August 12, 2008
Version: 1.0
General Information
Executive Summary
This security update resolves three privately reported vulnerabilities
in Microsoft Office PowerPoint and Microsoft Office PowerPoint Viewer
that could allow remote code execution if a user opens a specially
crafted PowerPoint file. An attacker who successfully exploited any of
these vulnerabilities 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 Critical for supported editions of
Microsoft Office PowerPoint 2000 and rated Important for supported
editions of Microsoft Office PowerPoint 2002, Microsoft Office
PowerPoint 2003, Microsoft Office PowerPoint 2007, Microsoft Office
PowerPoint Viewer 2003, Microsoft Office Compatibility Pack for Word,
Excel, and PowerPoint 2007 File Formats, Microsoft Office 2004 for
Mac, and Microsoft Office 2008 for Mac. For more information, see the
subsection, Affected Software, in this section.
Recommendation. Microsoft recommends that customers apply the update
immediately.
Affected Software
Microsoft Office PowerPoint 2000 Service Pack 3
Microsoft Office PowerPoint 2002 Service Pack 3
Microsoft Office PowerPoint 2003 Service Pack 2
Microsoft Office PowerPoint 2003 Service Pack 3
Microsoft Office PowerPoint 2007
Microsoft Office PowerPoint 2007 Service Pack 1
Microsoft Office PowerPoint Viewer 2003
Microsoft Office Compatibility Pack for Word, Excel, and
PowerPoint 2007 File Formats
Microsoft Office Compatibility Pack for Word, Excel, and
PowerPoint 2007 File Formats Service Pack 1
Microsoft Office 2004 for Mac
Vulnerability Information
Memory Allocation Vulnerability - CVE-2008-0120
A remote code execution vulnerability exists in the way that Microsoft
Office PowerPoint Viewer 2003 handles specially crafted PowerPoint
files. An attacker could exploit the vulnerability by creating a
specially crafted PowerPoint file that 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.
Workarounds for the Memory Allocation Vulnerability - CVE-2008-0120
Do not open or save Microsoft Office 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.
Memory Calculation Vulnerability - CVE-2008-0121
A remote code execution vulnerability exists in the way that Microsoft
Office PowerPoint Viewer 2003 handles specially crafted PowerPoint
files. An attacker could exploit the vulnerability by creating a
specially crafted PowerPoint file that 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.
Workarounds for the Memory Calculation Vulnerability - CVE-2008-0121
Do not open or save Microsoft Office 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.
Parsing Overflow Vulnerability - CVE-2008-1455
A remote code execution vulnerability exists in the way that Microsoft
Office PowerPoint handles specially crafted PowerPoint files. An
attacker could exploit the vulnerability by creating a specially
crafted PowerPoint file that 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.
Workarounds for the Parsing Overflow Vulnerability - CVE-2008-1455
Use the Microsoft Office Isolated Conversion Environment (MOICE) when
opening files from unknown or un-trusted sources
Use Microsoft Office File Block policy to block the opening of Office
2003 and earlier documents from unknown or untrusted sources and
locations
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