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 © 2008 iDefense, Inc.
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at the time of publishing based on currently available information. Use
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