Cisco Security Advisory

Cisco Device Manager Command Execution Vulnerability

Advisory ID: cisco-sa-20130424-fmdm

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130424-fmdm

Revision 1.0

For Public Release 2013 April 24 16:00  UTC (GMT)


Summary

Cisco Device Manager contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary commands on a client host with the privileges of the user. This vulnerability affects Cisco Device Manager for the Cisco MDS 9000 Family and Cisco Nexus 5000 Series Switches when it is installed or launched via the Java Network Launch Protocol (JNLP) on a host running Microsoft Windows.

Cisco Device Manager installed or launched from Cisco Prime Data Center Network Manager (DCNM) or Cisco Fabric Manager is not affected. This vulnerability can only be exploited if the JNLP file is executed on systems running Microsoft Windows. The vulnerability affects the confidentiality, integrity, and availability of the client host performing the installation or execution of Cisco Device Manager via JNLP file. There is no impact on the Cisco MDS 9000 Family or Cisco Nexus 5000 Series Switches.

Cisco has released free software updates that address this vulnerability in the Cisco Device Manager for Cisco MDS 9000 Family Switches. Cisco Nexus 5000 Series Switches have discontinued the support of the Cisco Device Manager installation via JNLP and updates are not available.

Workarounds that mitigate this vulnerability are available. This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130424-fmdm

Affected Products

Vulnerable Products

This vulnerability affects the following versions of Cisco Device Manager for the Cisco MDS 9000 Family or Cisco Nexus 5000 Series Switches:
  • Cisco Device Manager versions 5.x and earlier
Note: Only Cisco Device Manager software installed or launched via JNLP file on Microsoft Windows is affected by this vulnerability.

Products Confirmed Not Vulnerable

No other Cisco products are currently known to be affected by this vulnerability.

Details

Cisco Device Manager can be used for detailed switch provisioning and provides a graphical representation of the Cisco MDS 9000 Family or Cisco Nexus 5000 Series Switches chassis.

The Device Manager could be installed either from the Cisco Prime Data Center Network Manager (DCNM) previously called Cisco Fabric Manager server, or via JNLP file downloaded from the switch web interface.

A vulnerability in the Java Archive (JAR) executable files that are downloaded via JNLP from the Cisco MDS 9000 Series or Cisco Nexus 5000 Series Switches could allow an unauthenticated, remote attacker to execute arbitrary commands on the client host that is executing the JNLP file. Command execution would occur with the privileges of the user.

The vulnerability is due to insufficient validation of certain parameters passed by the element-manager.jnlp file and executed by the affected JAR files. An attacker may exploit this vulnerability by redirecting the user to download a crafted version of the element-manager.jnlp file and execute the file.

Note: This vulnerability affects Cisco Device Manager installed or launched via the JNLP method. Cisco Device Manager installed or launched from Cisco Prime DCNM or Cisco Fabric Manager is not affected. This vulnerability can only be exploited if the JNLP file is executed on systems running Microsoft Windows. The vulnerability affects the confidentiality, integrity and availability of the client host performing the installation of Cisco Device Manager. There is no impact on the Cisco MDS 9000 Family or Cisco Nexus 5000 Series Switches.

This vulnerability is documented in Cisco bug IDs CSCty17417 (registered customers only) for Cisco MDS 9000 Family Switches and CSCty10802 (registered customers only) for Cisco Nexus 5000 Series Switches.

This vulnerability has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2013-1192.

Vulnerability Scoring Details

Cisco has scored the vulnerability in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this security advisory is in accordance with CVSS version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability severity and helps organizations determine the urgency and priority of a response.

Cisco has provided a base and temporal score. Customers can also compute environmental scores that help determine the impact of the vulnerability in their own networks.

Cisco has provided additional information regarding CVSS at the following link:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to compute the environmental impact for individual networks at the following link:

http://intellishield.cisco.com/security/alertmanager/cvss



CSCty17417 - Cisco Device Manager Command Execution Vulnerability

Calculate the environmental score of CSCty17417

CVSS Base Score - 9.3

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Medium

None

Complete

Complete

Complete

CVSS Temporal Score - 7.7

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCty10802 - Cisco Device Manager Command Execution Vulnerability

Calculate the environmental score of CSCty10802

CVSS Base Score - 9.3

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Medium

None

Complete

Complete

Complete

CVSS Temporal Score - 8.4

Exploitability

Remediation Level

Report Confidence

Functional

Workaround

Confirmed

Impact

Successful exploitation may allow an attacker to execute arbitrary commands on a host with the privileges of the user.

Software Versions and Fixes

When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution.

In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.

This vulnerability has been resolved in Cisco Device Manager for Cisco MDS 9000 Family Switches versions 5.2.8 and above.

Cisco Nexus 5000 Series Switches have discontinued the support for Cisco Device Manager installation via JNLP file. No updates are available. Customers should use Cisco Prime DCNM to manage the switch instead.

Workarounds

Installing Cisco Device Manager from Cisco Prime DCNM or Fabric Manager may provide a workaround for this issue.

Obtaining Fixed Software

Cisco has released free software updates that address the vulnerability described in this advisory. Prior to deploying software, customers are advised to consult their maintenance providers or check the software for feature set compatibility and known issues that are specific to their environments.

Customers may only install and expect support for feature sets they have purchased. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html.

Customers with Service Contracts

Customers with contracts should obtain upgraded software through their regular update channels. For most customers, upgrades should be obtained through the Software Navigator on Cisco.com at http://www.cisco.com/cisco/software/navigator.html.

Customers Using Third-Party Support Organizations

Customers with Cisco products that are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers, should contact that organization for assistance with the appropriate course of action.

The effectiveness of any workaround or fix depends on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Because of the variety of affected products and releases, customers should consult their service providers or support organizations to ensure that any applied workaround or fix is the most appropriate in the intended network before it is deployed.

Customers Without Service Contracts

Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco Technical Assistance Center (TAC):
  • +1 800 553 2447 (toll free from within North America)
  • +1 408 526 7209 (toll call from anywhere in the world)
  • e-mail: tac@cisco.com
Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Customers without service contracts should request free upgrades through the TAC.

Refer to Cisco Worldwide Contacts at http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information, including localized telephone numbers, instructions, and e-mail addresses for support in various languages.

Exploitation and Public Announcements

The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

This vulnerability was reported to Cisco by Jurgens Van Der Merwe from SensePost Information Security.

Status of This Notice: Final

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.


Distribution

This advisory is posted on Cisco Security Intelligence Operations at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130424-fmdm

Additionally, a text version of this advisory is clear signed with the Cisco PSIRT PGP key and circulated among the following e-mail addresses:
  • cust-security-announce@cisco.com
  • first-bulletins@lists.first.org
  • bugtraq@securityfocus.com
  • vulnwatch@vulnwatch.org
  • cisco@spot.colorado.edu
  • cisco-nsp@puck.nether.net
  • full-disclosure@lists.grok.org.uk
Future updates of this advisory, if any, will reside on Cisco.com but may not be announced on mailing lists. Users can monitor this advisory's URL for any updates.

Revision History

Revision 1.0 2013-April-24 Initial public release.

Cisco Security Procedures

Complete information about reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco is available on Cisco.com at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html. This web page includes instructions for press inquiries regarding Cisco Security Advisories. All Cisco Security Advisories are available at http://www.cisco.com/go/psirt.
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