Description: Some vulnerabilities have been reported in Microsoft Word, which can be exploited by malicious people to compromise a user's system.
1) An unspecified error in the handling of certain strings in Word documents can be exploited to cause a memory corruption via a specially crafted string.
NOTE: According to Microsoft, this vulnerability is already being actively exploited on a limited scale.
2) An error within the processing of counts in Word documents can be exploited to somewhat control the destination address of a memmove() call by manipulating a certain DWORD in the document used for calculating the destination address.
3) An error within the handling of macros in Word documents can be exploited to automatically execute a macro by manipulating certain properties in a Word document.
4) An error within the processing of drawing objects can be exploited to cause a memory corruption via a Word document containing a specially crafted drawing object.
Successful exploitation of the vulnerabilities allows execution of arbitrary code.
Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, scan using the Network Software Inspector.
Provided and/or discovered by: 1) Discovered as a 0-day.
2) disco
3) The vendor credits USAA.
4) Reported by the vendor.
Changelog: 2006-12-14: Added information about PoC possibly being available for this vulnerability.
2006-12-15: Added link to US-CERT.
2006-12-17: Divided advisory into two separate vulnerabilities.
2007-02-13: Added additional information from Microsoft. Updated "Solution" section.
If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
Ideas, suggestions, and other feedback are most welcome.
