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Vulnerabilities in Microsoft Office Allow Code Execution (MS06-048)
------------------------------------------------------------------------
SUMMARY
Multiple vulnerabilities have been found in Microsoft Office, these
vulnerabilities allow remote attackers to cause the product to execute
arbitrary code.
DETAILS
Affected Software:
* Microsoft Office 2000 Service Pack 3 -
<http://www.microsoft.com/downloads/details.aspx?FamilyId=B7B5615B-7C20-4C49-892F-7F4CCC2D6006>
Download the update (KB921568)
* Microsoft PowerPoint 2000
* Microsoft Office XP Service Pack 3 -
<http://www.microsoft.com/downloads/details.aspx?FamilyId=A9C7E43B-A0A6-4C81-87ED-3F4DED78EAEA>
Download the update (KB921567)
* Microsoft PowerPoint 2002
* Microsoft Office 2003 Service Pack 1 or Service Pack 2 -
<http://www.microsoft.com/downloads/details.aspx?FamilyId=DE1CB2A7-5D4C-44B8-BC40-7E0A88CC3081>
Download the update (KB921566)
* Microsoft Office PowerPoint 2003
* Microsoft Office 2004 for Mac - <http://www.microsoft.com/mac>
Download the update (KB923151)
* PowerPoint 2004 for Mac
* Microsoft Office v. X for Mac - <http://www.microsoft.com/mac>
Download the update (KB923148)
* PowerPoint 2004 v. X for Mac
Non-Affected Software:
* Microsoft PowerPoint 2003 Viewer
* Microsoft Works Suites:
* Microsoft Works Suite 2004
* Microsoft Works Suite 2005
* Microsoft Works Suite 2006
Microsoft PowerPoint Mso.dll Vulnerability - CVE-2006-3590
A remote code execution vulnerability exists in PowerPoint and could be
exploited when a file containing a malformed shape container is parsed by
PowerPoint. Such a file might be included in an e-mail attachment or
hosted on a malicious web site. An attacker could exploit the
vulnerability by constructing a specially crafted PowerPoint file that
could allow remote code execution.
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.
Mitigating Factors for Microsoft PowerPoint Mso.dll Vulnerability -
CVE-2006-3590
* 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 Outlook 2002 and Outlook 2003, the vulnerability could not be
exploited automatically through e-mail. A user would have to click on an
attachment and then acknowledge a warning and accept a prompt to Open
before the vulnerability could be exploited.
* 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 persuade 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 attacker's Web site.
Note PowerPoint 2000 files do not prompt the user to Open, Save, or Cancel
before opening a document.
Workarounds for Microsoft PowerPoint Mso.dll Vulnerability -
CVE-2006-3590:
Microsoft has tested the following workarounds. While these workarounds
will not correct the underlying vulnerability, they help block known
attack vectors. When a workaround reduces functionality, it is identified
in the following section.
Do not open or save Microsoft Office files that you receive from
un-trusted sources or that you received unexpectedly from trusted sources.
This vulnerability could be exploited when a user opens a file.
FAQ for Microsoft PowerPoint Mso.dll Vulnerability - CVE-2006-3590:
What is the scope of the vulnerability?
A remote code execution vulnerability exists in PowerPoint and could be
exploited when a file containing a malformed shape container is parsed by
PowerPoint. Such a file might be included in an e-mail attachment or
hosted on a malicious web site. An attacker could exploit the
vulnerability by constructing a specially crafted PowerPoint file that
could allow remote code execution.
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.
What causes the vulnerability?
The vulnerability is caused when PowerPoint opens a specially crafted
PowerPoint file and parses a malformed shape.
What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could cause
arbitrary code to run with the privileges of the user who opened the file.
How could an attacker exploit the vulnerability?
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 persuade 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 attacker's Web site.
In an e-mail attack scenario, an attacker could exploit the vulnerability
by sending a specially-crafted file to the user and by persuading the user
to open the file.
What systems are primarily at risk from the vulnerability?
Workstations and terminal servers are primarily at risk. Servers could be
at more risk if administrators allow users to log on to servers and to run
programs. However, best practices strongly discourage allowing this.
What does the update do?
The update removes the vulnerability by modifying the way that PowerPoint
parses the length of a record before it passes the message to the
allocated buffer.
When this security bulletin was issued, had this vulnerability been
publicly disclosed?
Yes. While the initial report was provided through responsible disclosure,
the vulnerability was later disclosed publicly. This security bulletin
addresses the publicly disclosed vulnerability as well as additional
issues discovered through internal investigations.
When this security bulletin was issued, had Microsoft received any reports
that this vulnerability was being exploited?
Yes. When the security bulletin was released, Microsoft had received
information that this vulnerability was being exploited.
Does applying this security update help protect customers from the code
that has been published publicly that attempts to exploit this
vulnerability?
Yes. This security update addresses the vulnerability. The vulnerability
that has been addressed has been assigned the Common Vulnerability and
Exposure number CVE-2006-3590 and was previously described in Microsoft
Security Advisory 922970.
Microsoft PowerPoint Malformed Record Vulnerability - CVE-2006-3449
A remote code execution vulnerability exists in PowerPoint and could be
exploited when a file containing a malformed record is parsed by
PowerPoint. Such a file might be included in an e-mail attachment or
hosted on a malicious web site. An attacker could exploit the
vulnerability by constructing a specially crafted PowerPoint file that
could allow remote code execution.
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.
Mitigating Factors for Microsoft PowerPoint Malformed Record Vulnerability
- CVE-2006-3449
* 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 Outlook 2002 and Outlook 2003, the vulnerability could not be
exploited automatically through e-mail. A user would have to click on an
attachment and then acknowledge a warning and accept a prompt to Open
before the vulnerability could be exploited.
* 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 persuade 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 attacker's Web site.
Note Office 2000 files do not prompt the user to Open, Save, or Cancel
before opening a document.
Workarounds for Microsoft PowerPoint Malformed Record Vulnerability -
CVE-2006-3449:
Microsoft has tested the following workarounds. While these workarounds
will not correct the underlying vulnerability, they help block known
attack vectors. When a workaround reduces functionality, it is identified
in the following section.
Do not open or save Microsoft Office files that you receive from
un-trusted sources or that you received unexpectedly from trusted sources.
This vulnerability could be exploited when a user opens a file.
FAQ for Microsoft PowerPoint Malformed Record Vulnerability -
CVE-2006-3449:
What is the scope of the vulnerability?
A remote code execution vulnerability exists in PowerPoint and could be
exploited when a file containing a malformed record is parsed by
PowerPoint. Such a file might be included in an e-mail attachment or
hosted on a malicious web site. An attacker could exploit the
vulnerability by constructing a specially crafted PowerPoint file that
could allow remote code execution.
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.
What causes the vulnerability?
The vulnerability is caused when PowerPoint opens a specially crafted
PowerPoint file and parses a malformed record.
What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could cause
arbitrary code to run with the privileges of the user who opened the file.
How could an attacker exploit the vulnerability?
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 persuade 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 attacker's Web site.
In an e-mail attack scenario, an attacker could exploit the vulnerability
by sending a specially-crafted file to the user and by persuading the user
to open the file.
What systems are primarily at risk from the vulnerability?
Workstations and terminal servers are primarily at risk. Servers could be
at more risk if administrators allow users to log on to servers and to run
programs. However, best practices strongly discourage allowing this.
What does the update do?
The update removes the vulnerability by modifying the way that PowerPoint
parses the length of a record before it passes the message to the
allocated buffer.
When this security bulletin was issued, had this vulnerability been
publicly disclosed?
No. Microsoft received information about this vulnerability through
responsible disclosure. Microsoft had not received any information to
indicate that this vulnerability had been publicly disclosed when this
security bulletin was originally issued. This security bulletin addresses
the privately disclosed vulnerability as well as additional issues
discovered through internal investigations.
When this security bulletin was issued, had Microsoft received any reports
that this vulnerability was being exploited?
No. Microsoft had not received any information to indicate that this
vulnerability had been publicly used to attack customers and had not seen
any examples of proof of concept code published when this security
bulletin was originally issued.
ADDITIONAL INFORMATION
The information has been provided by Microsoft Product Security.
The original article can be found at:
<http://www.microsoft.com/technet/security/Bulletin/MS06-048.mspx>
http://www.microsoft.com/technet/security/Bulletin/MS06-048.mspx
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