FYI

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             AUSCERT External Security Bulletin Redistribution

                    ESB-2006.0057 -- [Win][UNIX/Linux]
              EMC Legato Networker nsrd.exe DoS Vulnerability
                              18 January 2006

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           EMC Legato NetWorker nsrd.exe
Publisher:         iDEFENSE
Operating System:  AIX
                   HP-UX
                   IRIX
                   Linux variants
                   Mac OS X
                   Solaris
                   Windows
Impact:            Denial of Service
Access:            Remote/Unauthenticated
CVE Names:         CAN-2005-3659

Original Bulletin:
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=37
5

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EMC Legato Networker nsrd.exe DoS Vulnerability

iDefense Security Advisory 01.17.06
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=37
5 January 17, 2006

I. BACKGROUND

EMC Legato NetWorker is a cross-platform backup and recovery
application.

II. DESCRIPTION

Remote exploitation of a denial of service vulnerability in EMC
Corp.'s Legato Networker allows attackers to crash the nsrd service.

The vulnerability specifically exists due to improper handling of
malformed RPC requests to RPC program number 390109. By sending such a
request, an attacker is able to cause a NULL pointer to be used as the
base in a memory reference, which leads to a crash of the service. The
daemon will crash on a NULL pointer dereference as no exception
handlers are invoked which might allow it to recover.

III. ANALYSIS

Successful exploitation allows a remote attacker to crash the nsrd.exe
process.

IV. DETECTION

iDefense has confirmed this vulnerability in Networker 7.2 build 172.
All previous versions are suspected vulnerable.

V. WORKAROUND

iDefense is currently unaware of any workarounds for this issue.

VI. VENDOR RESPONSE

"Complete resolutions to the vulnerabilities are available today in
NetWorker 7.1.4 and 7.3.  EMC has created a hot-fix to protect against
vulnerabilities for 7.2.1 customers.  No fixes are planned for
previous NetWorker releases."

"These remedies are available for download at:"

  http://www.legato.com/support/websupport/product_alerts/011606_NW.ht
  m

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned
the name CAN-2005-3659 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

11/17/2005 Initial vendor notification
11/17/2005 Initial vendor response
01/17/2006 Coordinated public disclosure

IX. CREDIT

Jo Goossens is credited with the discovery of this vulnerability.

Get paid for vulnerability research
http://www.idefense.com/poi/teams/vcp.jsp

Free tools, research and upcoming events
http://labs.idefense.com

X. LEGAL NOTICES

Copyright © 2006 iDefense, Inc.

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please email customerservice AT idefense DOT 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. 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.


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--


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Technical Services
Information Technology Services
University of Otago
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Cell:           0274 917157
Fax:            03 479 5080
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