iDefense Security Advisory 04.09.08
http://labs.idefense.com/intelligence/vulnerabilities/ 
Apr 09, 2008

I. BACKGROUND

EMC DiskXtender is a data backup and migration suite. It consists of
several applications that are used to manage storing large quantities
of files across multiple storage devices. One of the components of
DiskXtender is the MediaStor, which is used to provide support for a
variety of media and device types. For more information see the
vendor's website at the following URL.

http://software.emc.com/products/product_family/diskxtender_family.htm 

II. DESCRIPTION

Remote exploitation of a format string vulnerability in EMC Corp.'s
DiskXtender could allow an attacker to execute arbitrary code with the
privileges of the affected service.

When handling requests on the RPC interface with UUID
b157b800-aef5-11d3-ae49-00600834c15f, the service does not properly
validate the content of a string in requests. Since this string is
passed directly to a formatting function, a format string vulnerability
occurs.

III. ANALYSIS

Exploitation of this vulnerability results in the execution of arbitrary
code with the privileges of the affected service, usually SYSTEM. In
order to exploit this vulnerability, authentication is required.

IV. DETECTION

iDefense confirmed the existence of this vulnerability in DiskXtender
version 6.20.060 for Windows. Previous versions may also be affected.

V. WORKAROUND

iDefense is currently unaware of any effective workaround for this
issue.

VI. VENDOR RESPONSE

"EMC has issued updates to correct this issue. More details can be found
in knowledgebase article emc184091 available from powerlink.emc.com. EMC
customers can further contact EMC Software Technical Support at
1-877-534-2867."

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2008-0963 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

02/21/2008  Initial vendor notification
02/22/2008  Initial vendor response
04/09/2008  Coordinated public disclosure

IX. CREDIT

This vulnerability was reported to iDefense by Stephen Fewer of Harmony
Security (www.harmonysecurity.com). 

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X. LEGAL NOTICES

Copyright =A9 2008 iDefense, Inc.

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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.
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