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Insecure Library Loading
Highly critical

Microsoft Office Word Multiple Vulnerabilities

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Release Date:  2008-12-09    Last Update:  2009-01-14    Views:  21,793

Secunia Advisory SA30285

Where:

From remote

Impact:

System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Multiple vulnerabilities have been reported in Microsoft Office Word, which can be exploited by malicious people to compromise a user's system.

1) An error when processing List File Override (LFO) entries can be exploited to corrupt memory via a specially crafted Word file.

2) An integer overflow error exists when calculating the space required for the specified number of points in a polyline or polygon. This can be exploited to cause a heap-based buffer overflow during parsing of objects in Rich Text Format (.rtf) files e.g. when a user opens a specially crafted .rtf file with Word or previews a specially crafted e-mail.

3) An unspecified error when parsing certain records can be exploited to corrupt memory via a specially crafted Word file.

4) An error exists when processing consecutive "\do" drawing object tags encountered in RTF documents. This can be exploited to free a heap buffer twice and corrupt memory.

5) An error when processing mismatched "\dpgroup" and "\dpendgroup" controlwords can be exploited to cause a buffer overflow via an RTF document containing an overly large number of "\dpendgroup" tags.

6) A boundary error when parsing RTF documents containing multiple drawing object tags can be exploited to cause a heap-based buffer overflow.

7) A boundary error when processing RTF documents can be exploited to overflow a static buffer via a document containing an overly large number of "\stylesheet" control words.

8) An error when processing a malformed table property can be exploited to cause a stack-based buffer overflow via a specially crafted Word document.

Successful exploitation of the vulnerabilities may allow execution of arbitrary code.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) The vendor credits Ricardo Narvaja, Core Security Technologies.
2) Dyon Balding, Secunia Research.
3) The vendor credits Yamata Li, Palo Alto Networks.
4) The vendor credits Wushi via ZDI.
5) The vendor credits Aaron Portnoy, TippingPoint DVLabs.
6) The vendor credits Wushi of team509 via ZDI.
7) The vendor credits Aaron Portnoy, TippingPoint DVLabs.
8) The vendor credits Wushi and Ling via ZDI.

Original Advisory:
MS08-072 (KB957173):
http://www.microsoft.com/technet/security/Bulletin/MS08-072.mspx

Secunia Research:
http://secunia.com/secunia_research/2008-21/

ZDI:
http://www.zerodayinitiative.com/advisories/ZDI-08-084/
http://www.zerodayinitiative.com/advisories/ZDI-08-085/
http://www.zerodayinitiative.com/advisories/ZDI-08-086/

TippingPoint DVLabs:
http://dvlabs.tippingpoint.com/advisory/TPTI-08-08
http://dvlabs.tippingpoint.com/advisory/TPTI-08-09

Core Security Technologies:
http://www.coresecurity.com/content/word-arbitrary-free

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 Office Word Multiple Vulnerabilities

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