I. BACKGROUND
EMC Navisphere storage management software is a suite of tools that
enables discovery, monitoring, provisioning, and reporting on EMC
CLARiiON FC4700 Storage Systems.
II. DESCRIPTION
Remote exploitation a directory traversal vulnerability in EMC Corp.
Navisphere Manager could allow an attacker to retrieve arbitrary files
from the system running Navisphere Manager as well as retrieve directory
listings.
The vulnerability specifically exists due to a lack of validation of
HTTP requests. The following request can be used to retrieve the
Navisphere Manager log file, which often contains the administrative
password in plaintext:
http://vulnerable/../../../../../../../EMC/NAVISPHERE/common/log/navimon.log
Another flaw allows a user to list the contents of arbitrary directories
by simply appending a '.' to the end of a request. The following request
will list the contents of the server root:
http://vulnerable/.
However, this only lists static web content, which does not contain any
sensitive information. Furthermore, if this static web content is
installed on a remote workstation valid login credentials are still
required to gain access to the CLARiiON.
III. ANALYSIS
Successful exploitation allows remote attackers to gain access to files
on the target system; in some cases, it is possible to retrieve the
Clarion Administrator password by viewing log files.
IV. DETECTION
Navisphere Manager Base 6.4.1.0.0 is reportedly vulnerable.
V. WORKAROUND
Limit access to the Navisphere Manager server to only trusted hosts.
Since the Manager runs on TCP port 80, apply filters where possible.
VI. VENDOR RESPONSE
"The vulnerability identified is found in older versions of Navisphere
Management Server �, for which an update has been issued. In these
updated versions, HTTP validation is implemented. Attempts to traverse
the file system by way of a URL (e.g., "../../..") are detected and such
requests are rejected with the following error:
'The page cannot be displayed'
Customers running Navisphere Manager Version 6.4, 6.5, or 6.6 who do not
have the following revisions (or higher) should contact their authorized
EMC Service representative:
6.6.0.5.0 Management Server
6.6.0.5.0 Management Server Base
6.6.0.5.0 Windows Management Server
6.5.4.0.0 Management Server
6.5.4.0.0 Management Server Base
6.5.4.0.0 Windows Management Server
6.4.8.0.0 Management Server
6.4.8.0.0 Management Server Base
6.4.8.0.0 Windows Management Server
Later revisions of Navisphere Management Server that come bundled with
the FLARE Operating Environment (FOE) already contain this fix, starting
with FLARE 14 (rev 02.07) released in June 2004."
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CAN-2005-2357 to the "../" issue and CAN-2005-2358 to the trailing
dot issue. These are candidates for inclusion in the CVE list
(http://cve.mitre.org), which standardizes names for security problems.
VIII. DISCLOSURE TIMELINE
04/19/2005 Initial vendor notification
05/05/2005 Initial vendor response
08/05/2005 Coordinated public disclosure
IX. CREDIT
The discoverer of this vulnerability wishes to remain anonymous.
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X. LEGAL NOTICES
Copyright � 2005 iDEFENSE, Inc.
Permission is granted for the redistribution of this alert
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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
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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.
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.
