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iDefense Security Advisory 08.10.10: Microsoft Word RTF File Parsing Heap Buffer Overflow Vulnerability
iDefense Security Advisory 08.10.10
Aug 10, 2010
Microsoft Word is a word processing application from Microsoft Office.
For more information about Microsoft Word, see the following website:
Rich-Text Format (RTF) is a document file format developed by Microsoft
for cross-platform document interchange.
Remote exploitation of a heap buffer overflow vulnerability in Microsoft
Corp.'s Word could allow attackers to execute arbitrary code under the
privileges of the targeted user.
This vulnerability specifically exists in the handling of some drawing
object control words in an RTF document. Under certain circumstances,
Word will copy a property value into a heap buffer without checking the
length, which causes a heap buffer overflow.
Exploitation allows remote attackers to execute arbitrary code on the
affected host under the context of the user who opened the malicious
RTF document with Microsoft Word.
Exploitation might require that the user open a specially crafted RTF
document with a vulnerable application. The most likely exploitation
vector involves convincing a user to open an RTF document sent to the
user via e-mail or linked on a website.
iDefense has confirmed the existence of this vulnerability in Microsoft
Word 2003, Microsoft Word 2007, and Microsoft Outlook 2007. A full list
of vulnerable Microsoft products can be found in Microsoft Security
Microsoft suggested workarounds can be found in Microsoft Security
VI. VENDOR RESPONSE
Microsoft Corp. has released patches which address this issue.
Information about downloadable vendor updates can be found by clicking
on the URLs shown.
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2010-1902 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
VIII. DISCLOSURE TIMELINE
08/12/2009 Initial Vendor Notification
08/12/2009 Initial Vendor Reply
08/10/2010 Coordinated Public Disclosure
This vulnerability was reported to iDefense by wushi of team509.
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Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct,
indirect, or consequential loss or damage arising from use of, or
reliance on, this information.