copyright | disclaimer | privacy | contact

HOME   About AusCERT   Membership   Contact Us   PKI Services   Training   Publications   Sec. Bulletins   Conferences   News & Media   Services   Web Log   Site Map   Site Help   Member login Login »  Become a member »   Home » Security Bul... » By Operating... » Windows (all) » AL-2006.0041 -- [Win] -- Unpatched Microsoft Word bu...   AL-2006.0041 -- [Win] -- Unpatched Microsoft Word buffer overflow vulnerability Date: 20 May 2006 References: AU-2006.0017   Click here for printable version -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== A U S C E R T A L E R T AL-2006.0041 -- AUSCERT ALERT [Win] Unpatched Microsoft Word buffer overflow vulnerability 20 May 2006 =========================================================================== AusCERT Alert Summary --------------------- Product: Microsoft Word 2003 Microsoft Word XP Other related Microsoft Office products (as vector) Publisher: US-CERT Operating System: Windows Impact: Execute Arbitrary Code/Commands Access: Remote/Unauthenticated Member content until: Wednesday, May 24 2006 Comment: The following unpatched vulnerability in Microsoft Word is reported as being currently exploited in the wild. Microsoft have released the following preliminary information: http://blogs.technet.com/msrc/archive/2006/05/19/429353.aspx SANS ISC have a list of other suggested mitigations: http://isc.sans.org/diary.php?storyid=1347 More from SANS ISC with early analysis at: http://isc.sans.org/diary.php?storyid=1345 http://isc.sans.org/diary.php?storyid=1346 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 National Cyber Alert System Technical Cyber Security Alert TA06-139A Microsoft Word Vulnerability Original release date: May 19, 2006 Last revised: -- Source: US-CERT Systems Affected * Microsoft Word 2003 * Microsoft Word XP (2002) Microsoft Word is included in Microsoft Works Suite and Microsoft Office. Other versions of Word, and other Office programs may be affected or act as attack vectors. Overview A buffer overflow vulnerability in Microsoft Word could allow an attacker to execute arbitrary code on a vulnerable system. I. Description Microsoft Word contains a buffer overflow vulnerability. Opening a specially crafted Word document, including documents hosted on web sites or attached to email messages, could trigger the vulnerability. Office documents can contain embedded objects. For example, a malicious Word document could be embedded in an Excel or PowerPoint document. Office documents other than Word documents could be used as attack vectors. For more information, please see Vulnerability Note VU#446012. II. Impact By convincing a user to open a specially crafted Word document, an attacker could execute arbitrary code on a vulnerable system. If the user has administrative privileges, the attacker could gain complete control of the system. III. Solution At the time of writing, there is no complete solution available. Consider the following workarounds: Do not open untrusted Word documents Do not open unfamiliar or unexpected Word or other Office documents, including those received as email attachments or hosted on a web site. Please see Cyber Security Tip ST04-010 for more information. Do not rely on file extension filtering In most cases, Windows will call Word to open a document even if the document has an unknown file extension. For example, if document.d0c (note the digit "0") contains the correct file header information, Windows will open document.d0c with Word. Appendix A. References * Vulnerability Note VU#446012 - <http://www.kb.cert.org/vuls/id/446012> * Cyber Security Tip ST04-010 - <http://www.us-cert.gov/cas/tips/ST04-010.html> ____________________________________________________________________ Information used in this document came from SANS and Microsoft. ____________________________________________________________________ The most recent version of this document can be found at: <http://www.us-cert.gov/cas/techalerts/TA06-139A.html> ____________________________________________________________________ Feedback can be directed to US-CERT Technical Staff. Please send email to <cert@cert.org> with "TA06-139A Feedback VU#446012" in the subject. ____________________________________________________________________ For instructions on subscribing to or unsubscribing from this mailing list, visit <http://www.us-cert.gov/cas/signup.html>. ____________________________________________________________________ Produced 2006 by US-CERT, a government organization. Terms of use: <http://www.us-cert.gov/legal.html> ____________________________________________________________________ Revision History May 19, 2006: Initial release - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iQEVAwUBRG52p30pj593lg50AQKmsgf/SsFJRdioulQM941Cq2WA1tv+Y+3XcDme kW13FyXDSiSVjkLeGTS3CvmELieeyS8WNgF/bF5b4nU7U8PmYYlm5SB4gygsgg9q F7zNlw8EJoVxZTHDnFr8vq3IovhGsTsBwA0TyySUZHQkS6X5ESf65AzongmgRRT4 Oi4AUQd3n/XZdwrWtO7LPkaPF6IVTF28whLRwaeX+N7m10opL2WuqGrlbJ24VOJm x6UbIRRIhLNdubLGUi3iDA1+Ds1LsnZR22COvvNoQ2F3mA2ahP4D4rBrLTyqnLye zBCrGIIB0Wkvvh8yVelLKIplTWY/elUjwTUPsdQWsDeAm0AXKJjwPw== =1Nea - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 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 =========================================================================== 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. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRG6rIyh9+71yA2DNAQIYoAP+LgZ6hM+pF5Ox5H/a/1KKwp5CEylcv3jj bBTKgTXULym1sJuHoaHHr6Q68rYS5nYITlElnl7V1DgjDm6o74hpt1jMeOSflWHP HjrmGAMirbSthJNavI5rzLqQxJ5ZveXDY6kHfQi7c+z/beglfNaYmO1FriX9I5x9 jctxSAjpYpY= =AgBS -----END PGP SIGNATURE-----

Comments? Click here http://www.auscert.org.au/render.html?cid=21&it=6316