-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 National Cyber Alert System Technical Cyber Security Alert TA06-073A Microsoft Office and Excel Vulnerabilities Original release date: March 14, 2006 Last revised: -- Source: US-CERT Systems Affected * Microsoft Office for Windows and Mac OS X * Microsoft Excel for Windows and Mac OS X * Microsoft Works Suite for Windows For more complete information, refer to the Microsoft Security Bulletin Summary for March 2006. Overview Microsoft has released updates that address critical vulnerabilities in Microsoft Office and Excel. 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 Bulletin Summary for March 2006 addresses vulnerabilities in Microsoft Office and Excel. Further information is available in the following US-CERT Vulnerability Notes: VU#339878 - Microsoft Excel malformed parsing format file memory corruption vulnerability Microsoft Excel contains a memory corruption vulnerability. This vulnerability may allow a remote attacker to execute arbitrary code on a vulnerable system. (CVE-2006-0028) VU#104302 - Microsoft Excel malformed record memory corruption vulnerability Microsoft Excel fails to properly validate records. This vulnerability may allow a remote attacker to execute arbitrary code on a vulnerable system. (CVE-2006-0031) VU#123222 - Microsoft Excel malformed graphic memory corruption vulnerability Microsoft Excel fails to properly validate graphics. This vulnerability may allow a remote attacker to execute arbitrary code on a vulnerable system. (CVE-2006-0030) VU#235774 - Microsoft Excel malformed description memory corruption vulnerability Microsoft Excel fails to properly validate the description field. This vulnerability may allow a remote attacker to execute arbitrary code on a vulnerable system. (CVE-2006-0029) VU#642428 - Microsoft Excel fails to properly perform range validation when parsing document files Microsoft Excel contains an error in range validation, which may allow a remote unauthenticated, attacker to execute arbitrary code on a vulnerable system. (CVE-2005-4131) VU#682820 - Microsoft Office routing slip buffer overflow Microsoft Office contains a buffer overflow in the parsing of routing slips, which may allow an attacker to execute arbitrary code on a vulnerable system. (CVE-2006-0009) II. Impact A remote, unauthenticated attacker could 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 following US-CERT Vulnerability Notes for workarounds. Appendix A. References * Microsoft Security Bulletin Summary for March 2006 - * US-CERT Vulnerability Note VU#339878 - * US-CERT Vulnerability Note VU#104302 - * US-CERT Vulnerability Note VU#123222 - * US-CERT Vulnerability Note VU#235774 - * US-CERT Vulnerability Note VU#642428 - * US-CERT Vulnerability Note VU#682820 - * CVE-2005-4131 - * CVE-2006-0009 - * CVE-2006-0028 - * CVE-2006-0029 - * CVE-2006-0030 - * CVE-2006-0031 - * Microsoft Update - ____________________________________________________________________ The most recent version of this document can be found at: ____________________________________________________________________ Feedback can be directed to US-CERT Technical Staff. Please send email to with "TA06-073A Feedback VU#339878" in the subject. ____________________________________________________________________ For instructions on subscribing to or unsubscribing from this mailing list, visit . ____________________________________________________________________ Produced 2006 by US-CERT, a government organization. Terms of use: ____________________________________________________________________ Revision History March 14, 2006: Initial release -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iQEVAwUBRBdHxH0pj593lg50AQKjmwgA09ePMKZtjsxkwWaWMSFxtqGZaeV1hHby LBApam/YAuNpmLZKzwz36quzlbceDcSeBQKKbvgqhi/Cm4Sjsywczay0agHsdXiv dzwQCAeE0+5JA2kidsdQV9u+X866hfDq63oXy3nef/x1RPOBvNSOb8FnG1yvMCwn 965R6SUbtrA/4HRcEmVH+8dciSnARh90rcIPN6EorC7mCdXykk2YDs0MX8nuT+fl HeHn06kvTkmJbRNZ/xq7LyGIVeuQ7Xqv1fCiqywNdJUxHg1YPmBIPqfY3e6dcqE1 rS6ithE6u9GlDMTYbTLhL3+JGE4IiIRuZL10z37x+w07AHSFuTHfWQ== =3xcR -----END PGP SIGNATURE-----