Sono state segnalate delle vulnaribilita` gravi di Microsoft Word.
\nSi raccomanda di effettuare gli opportuni aggiornamenti.<\/p>\n
Domenica Quartarella
\nServizio Calcolo<\/p>\n
—–BEGIN PGP SIGNED MESSAGE—–
\nHash: SHA1<\/p>\n
National Cyber Alert System<\/p>\n
Technical Cyber Security Alert TA06-139A<\/p>\n
Microsoft Word Vulnerability<\/p>\n
Original release date: May 19, 2006
\n Last revised: —
\n Source: US-CERT<\/p>\n
Systems Affected<\/p>\n
* Microsoft Word 2003
\n * Microsoft Word XP (2002)<\/p>\n
Microsoft Word is included in Microsoft Works Suite and Microsoft
\n Office. Other versions of Word, and other Office programs may be
\n affected or act as attack vectors.<\/p>\n
Overview<\/p>\n
A buffer overflow vulnerability in Microsoft Word could allow an
\n attacker to execute arbitrary code on a vulnerable system.<\/p>\n
I. Description<\/p>\n
Microsoft Word contains a buffer overflow vulnerability. Opening a
\n specially crafted Word document, including documents hosted on web
\n sites or attached to email messages, could trigger the
\n vulnerability.<\/p>\n
Office documents can contain embedded objects. For example, a
\n malicious Word document could be embedded in an Excel or PowerPoint
\n document. Office documents other than Word documents could be used
\n as attack vectors.<\/p>\n
For more information, please see Vulnerability Note VU#446012.<\/p>\n
II. Impact<\/p>\n
By convincing a user to open a specially crafted Word document, an
\n attacker could execute arbitrary code on a vulnerable system. If
\n the user has administrative privileges, the attacker could gain
\n complete control of the system.<\/p>\n
III. Solution<\/p>\n
At the time of writing, there is no complete solution available.
\n Consider the following workarounds:<\/p>\n
Do not open untrusted Word documents<\/p>\n
Do not open unfamiliar or unexpected Word or other Office
\n documents, including those received as email attachments or hosted
\n on a web site. Please see Cyber Security Tip ST04-010 for more
\n information.<\/p>\n
Do not rely on file extension filtering<\/p>\n
In most cases, Windows will call Word to open a document even if
\n the document has an unknown file extension. For example, if
\n document.d0c (note the digit “0”) contains the correct file header
\n information, Windows will open document.d0c with Word.<\/p>\n
Appendix A. References<\/p>\n
* Vulnerability Note VU#446012 – * Cyber Security Tip ST04-010 – ____________________________________________________________________<\/p>\n Information used in this document came from SANS and Microsoft. The most recent version of this document can be found at:<\/p>\n <www.us-cert.gov\/cas\/techalerts\/TA06-139A.html<\/a>> Feedback can be directed to US-CERT Technical Staff. Please send For instructions on subscribing to or unsubscribing from this Produced 2006 by US-CERT, a government organization.<\/p>\n Terms of use:<\/p>\n
\n <www.kb.cert.org\/vuls\/id\/446012<\/a>><\/p>\n
\n <www.us-cert.gov\/cas\/tips\/ST04-010.html<\/a>><\/p>\n
\n ____________________________________________________________________<\/p>\n
\n ____________________________________________________________________<\/p>\n
\n email to <cert@cert.org<\/a>> with “TA06-139A Feedback VU#446012” in the
\n subject.
\n ____________________________________________________________________<\/p>\n
\n mailing list, visit <www.us-cert.gov\/cas\/signup.html<\/a>>.
\n ____________________________________________________________________<\/p>\n