US-CERT Technical Cyber Security Alert TA06-010A -- Microsoft Windows, Outlook, and Exchange Vulnerabilities

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                    National Cyber Alert System

             Technical Cyber Security Alert TA06-010A

Microsoft Windows, Outlook, and Exchange Vulnerabilities

Original release date: January 10, 2006
Last revised: January 10, 2006
Source: US-CERT

Systems Affected

 * Microsoft Windows
 * Microsoft Outlook
 * Microsoft Exchange

For more complete information, refer to the Microsoft Security
Bulletin Summary for January 2006.

Overview

Microsoft has released updates that address critical vulnerabilities
in Windows, Outlook, and Exchange. Exploitation of these
vulnerabilities could allow a remote, unauthenticated attacker to
execute arbitrary code or cause a denial of service on a vulnerable
system.

I. Description

Microsoft Security Bulletins for January 2006 address vulnerabilities
in Microsoft Windows, Outlook, and Exchange. Further information is
available in the following US-CERT Vulnerability Notes:

VU#915930 - Microsoft embedded web font buffer overflow

A heap-based buffer overflow in the way Microsoft Windows processes
embedded web fonts may allow a remote, unauthenticated attacker to
execute arbitrary code on a vulnerable system.
(CVE-2006-0010)

VU#252146 - Microsoft Outlook and Microsoft Exchange TNEF decoding
vulnerability

Microsoft Outlook and Microsoft Exchange contain an unspecified
vulnerability in processing TNEF attachments. This may allow a remote,
unauthenticated attacker to execute arbitrary code on a system running
the vulnerable software.
(CVE-2006-0002)

II. Impact

Exploitation of these vulnerabilities may allow a remote,
unauthenticated attacker to execute arbitrary code with the privileges
of the user. If the user is logged on with administrative privileges,
the attacker could take complete control of an affected system. An
attacker may also be able to cause a denial of service.

III. Solution

Apply Updates

Microsoft has provided the updates for these vulnerabilities in the
Security Bulletins and on the Microsoft Update site.

Workarounds

Please see the US-CERT Vulnerability Notes in Appendix A for workarounds.

Appendix A. References

 * Microsoft Security Bulletin Summary for January 2006 -
   <http://www.microsoft.com/technet/security/bulletin/ms06-jan.mspx>

 * US-CERT Vulnerability Note VU#915930 -
   <http://www.kb.cert.org/vuls/id/915930>

 * US-CERT Vulnerability Note VU#252146 -
   <http://www.kb.cert.org/vuls/id/252146>

 * CVE-2006-0002 -
   <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0002>

 * CAN-2006-0010 -
   <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0010>

 * Microsoft Update - <https://update.microsoft.com/microsoftupdate>

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The most recent version of this document can be found at:

 <http://www.us-cert.gov/cas/techalerts/TA06-010A.html>

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Feedback can be directed to US-CERT Technical Staff. Please send
email to <[email protected]> with "TA06-010A Feedback VU#915930" in the
subject.

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Produced 2006 by US-CERT, a government organization.

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Revision History

January 10, 2006: Initial release

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