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Category:   Application (Generic)  >   EMC DiskXtender Vendors:   EMC
EMC DiskXtender Built-in Password Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1019827
SecurityTracker URL:
CVE Reference:   CVE-2008-0961   (Links to External Site)
Date:  Apr 11 2008
Impact:   Execution of arbitrary code via network, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.20.060; possibly other versions
Description:   A vulnerability was reported in EMC DiskXtender. A remote user can use a built-in username and password to execute arbitrary commands on the target system.

The system includes a hard-coded login username and password. A remote user can connect to the RPC interface and supply the credentials to access the system.

The remote user can create and delete files on the target server and execute arbitrary DiskXtender commands. This allows the user to execute arbitrary commands with System level privileges.

The vendor was notified on February 21, 2008.

Stephen Fewer of Harmony Security reported this vulnerability via iDefense.

Impact:   A remote user can execute arbitrary commands on the target system.
Solution:   The vendor has issued a fix.

The vendor's advisory is available as knowledge base article emc184091, available to registered users at:

Vendor URL: (Links to External Site)
Cause:   Authentication error
Underlying OS:  Windows (Any)

Message History:   None.

 Source Message Contents

Subject:  iDefense Security Advisory 04.09.08: EMC DiskXtender Authentication

iDefense Security Advisory 04.09.08
Apr 09, 2008


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. The main components of the
product suite are the File System Manager, the MediaStor and the
License Server. These components all create RPC endpoints that can be
accessed remotely. For more information see the vendor's website at the
following URL.


Remote exploitation of an authentication bypass vulnerability in EMC
Corp.'s DiskXtender could allow an attacker to execute arbitrary code.

Each of the main components of the DiskXtender suite is vulnerable to an
authentication bypass vulnerability. Specifically, the authentication
code contains a hard-coded login and password. By connecting to the RPC
interface, and logging on with these credentials, it is possible to
bypass the normal authentication process.


Exploitation of this vulnerability results in an unauthenticated
attacker gaining administrative access to the DiskXtender server. This
allows an attacker to create and delete files on the backup server, and
run other DiskXtender commands. This could potentially lead to the
execution of arbitrary code with SYSTEM privileges.


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


iDefense is currently unaware of any effective workaround for this


"EMC has issued updates to correct this issue. More details can be found
in knowledgebase article emc184091 available from EMC
customers can further contact EMC Software Technical Support at


The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2008-0961 to this issue. This is a candidate for inclusion in
the CVE list (, which standardizes names for
security problems.


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


This vulnerability was reported to iDefense by Stephen Fewer of Harmony
Security (

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