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Insecure Library Loading
Extremely critical

Microsoft Word Multiple Memory Corruption Vulnerabilities

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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.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Discovered as a 0-day.
2) disco
3) The vendor credits USAA.
4) Reported by the vendor.

Original Advisory:
MS07-014 (KB929434):
http://www.microsoft.com/technet/security/Bulletin/MS07-014.mspx

Microsoft:
http://www.microsoft.com/technet/security/advisory/929433.mspx
http://blogs.technet.com/msrc/archive/2006/12/06/microsoft-security-advisory-929433-posted.aspx
http://blogs.technet.com/msrc/archive/2006/12/15/update-on-current-word-vulnerability-reports.aspx

milw0rm:
http://milw0rm.com/exploits/2922

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Microsoft Word Multiple Memory Corruption Vulnerabilities

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