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OpenOffice EMF Record Parsing Multiple Integer Overflow Vulns



iDefense Security Advisory 10.31.08: OpenOffice EMF Record Parsing Multiple Integer Overflow Vulnerabilities
iDefense Security Advisory 10.31.08: OpenOffice EMF Record Parsing Multiple Integer Overflow Vulnerabilities



iDefense Security Advisory 10.29.08
http://labs.idefense.com/intelligence/vulnerabilities/ 
Oct 29, 2008

I. BACKGROUND

OpenOffice is an open-source office application that supports reading
and writing a wide variety of file formats. For more information, see
the vendor's site found at the following link.

http://openoffice.org 

II. DESCRIPTION

Remote exploitation of multiple integer overflow vulnerabilities in
OpenOffice versions 2.4.1 and earlier could allow an attacker to
execute arbitrary code with the privileges of the current user.

Integer overflow issues exist within the code responsible for parsing
multiple EMR records within an EMF file. This allows an attacker to
overflow heap memory with data they supplied.

III. ANALYSIS

Exploitation of this issue allows an attacker to execute arbitrary code
with the privileges of the current user. An attacker would need to
entice a user into opening the malformed file using OpenOffice. The
file could be distributed to users via a Web page or e-mail
attachments. Upon opening the file, exploitation of this issue would
occur and execution of arbitrary code would be possible.

IV. DETECTION

iDefense has confirmed the existence of this vulnerability in OpenOffice
version 2.4.1.

V. WORKAROUND

iDefense is currently unaware of any workaround for this issue.

VI. VENDOR RESPONSE

OpenOffice has released OpenOffice.org 2.4.2 which addresses these
issues. For more information, consult their advisory at the following
URL.

http://www.openoffice.org/security/cves/CVE-2008-2238.html 

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2008-2238 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for 
security problems.

VIII. DISCLOSURE TIMELINE

09/18/2008  Initial Vendor Notification
09/19/2008  Initial Vendor Reply
09/19/2008  Request Additional Information
09/24/2008  Additional Vendor Feedback
10/29/2008  Coordinated Public Disclosure

IX. CREDIT

These vulnerabilities were reported to iDefense by several parties.
Several of the issues were reported by Sebastian Apelt and several were
also reported by Code Audit Labs http://www.vulnhunt.com. 

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X. LEGAL NOTICES

Copyright =A9 2008 iDefense, Inc.

Permission is granted for the redistribution of this alert
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please e-mail customerservice@idefense.com for permission. 

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.
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author nor the publisher accepts any liability for any direct,
indirect, or consequential loss or damage arising from use of, or
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