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Cisco Security Advisory

Cisco Digital Media Manager Privilege Escalation Vulnerability

Advisory ID: cisco-sa-20120118-dmm

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120118-dmm

Revision 1.1

Last Updated  2012 January 19 16:53  UTC (GMT)

For Public Release 2012 January 18 16:00  UTC (GMT)

Related Resources:

View related Applied Mitigation BulletinView related Alert

Summary

Cisco Digital Media Manager contains a vulnerability that may allow a remote, authenticated attacker to elevate privileges and obtain full access to the affected system.

Cisco Show and Share is not directly affected by this vulnerability. However, because Cisco Show and Share relies on Cisco Digital Media Manager for authentication services, attackers who compromise the Cisco Digital Media Manager may gain full access to Cisco Show and Share.

Cisco has released free software updates that address this vulnerability.

There are no workarounds that mitigate this vulnerability.

This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120118-dmm.

Affected Products

Vulnerable Products

The following table indicates which versions of Cisco Digital Media Manager are affected by this vulnerability:

Version Affected
prior to 5.2 YES
5.2.1 YES
5.2.1.1 YES
5.2.2 YES
5.2.2.1 NO
5.2.3 YES
 5.3 NO

Note: Cisco Digital Media Manager versions prior to 5.2 reached end of software maintenance. Customers running versions prior to 5.2 should contact their Cisco support team for assistance in upgrading to a supported version of Cisco Digital Media Manager.

How To Determine The Software Version

To determine the Cisco Digital Media Manager software version that an appliance is running, administrators can access the Cisco Digital Media Manager web interface. The version information is reported under "Digital Media Manager" in the center of the page.

Optionally administrators can log in to the Appliance Administration Interface (AAI), and access the main menu. The software version is identified next to the Cisco Digital Media Manager field. The following example identifies a Digital Media Manager appliance running version 5.2.1
 Cisco Digital Media Manager Application Administration Interface
                                 Main Menu                                  
   IP: 192.168.0.1                                                         
                                                                            
   Cisco Digital Media Manager 5.2.1                                               
   http://dmm.cisco.com:8080                                    
                                                                            
                                                                            
                                                                            
        SHOW_INFO               Show system information.                    
        BACKUP_AND_RESTORE      Back up and restore.                        
        APPLIANCE_CONTROL       Configure advance options                   
        NETWORK_SETTINGS        Configure network parameters.               
        DATE_TIME_SETTINGS      Configure date and time                     
        CERTIFICATE_MANAGEMENT  Manage all certificates in the system       
                                                                            
                                                                            
                                                                            
                                                                            
                       <  OK   >           <LOG OUT>

Products Confirmed Not Vulnerable

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

Details

Cisco Digital Media Manager (DMM) is a centralized web-based platform used to manage Cisco media network hardware, software, and services. It allows users to remotely perform management tasks for Cisco Digital Signs, Cisco Cast, and Cisco Show and Share.

Cisco Digital Media Manager contains a vulnerability that may allow a remote, authenticated attacker to elevate privileges and obtain full access to the affected system.

The vulnerability is due to improper validation of unreferenced URLs, which may allow an unprivileged attacker to access administrative resources and elevate privileges. An authenticated attacker, could exploit this vulnerability by sending the unreferenced URL to the affected system.

Cisco Show and Share is not directly affected by this vulnerability. However, because Cisco Show and Share relies on Cisco Digital Media Manager for authentication services, attackers who compromise the Cisco Digital Media Manager may gain full access to Cisco Show and Share.

This vulnerability could be exploited over the Cisco Digital Media Manager management port TCP 8443.



This vulnerability is documented in Cisco bug ID CSCts63878 (registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2012-0329.

Vulnerability Scoring Details

Cisco has provided scores for the vulnerability in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0.

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

Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions regarding CVSS at
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html .

Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at
http://intellishield.cisco.com/security/alertmanager/cvss .



CSCts63878 - Digital Media Manager Privilege Escalation Vulnerability

Calculate the environmental score of CSCts63878

CVSS Base Score - 9.0

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

Single

Complete

Complete

Complete

CVSS Temporal Score - 7.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

Impact

Successful exploitation of the vulnerability may allow a remote, authenticated attacker to elevate privileges and obtain full access to the affected system.

Additionally, because Cisco Show and Share relies on Cisco Digital Media Manager for authentication services, successful exploitation of the vulnerability on Cisco Digital Media Manager may allow the remote attacker to gain full access to Cisco Show and Share.

Software Versions and Fixes

Cisco has released free software updates that address this vulnerability.

The following table contains the remediation for each affected version of Cisco Digital Media Manager:

Version Remediation
5.2.1 Upgrade to 5.2.2.1
5.2.1.1 Upgrade to 5.2.2.1
5.2.2 Upgrade to 5.2.2.1
5.2.3 DMM523_PATCH-A.iso

When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.

In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.


Workarounds

There are no workarounds that mitigate this vulnerability.

Additional mitigations that can be deployed on Cisco devices within the network are available in the Cisco Applied Intelligence companion document for this advisory: http://tools.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20120118-dmm

Obtaining Fixed Software

Cisco has released free software updates that address these vulnerabilities. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment.

Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html , or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml .

Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades

Customers with Service Contracts

Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com.

Customers Using Third-Party Support Organizations

Customers whose Cisco products 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 support organization for guidance and assistance with the appropriate course of action in regards to this advisory.

The effectiveness of any workaround or fix is dependent on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Due to the variety of affected products and releases, customers should consult with their service provider or support organization to ensure any applied workaround or fix is the most appropriate for use in the intended network before it is deployed.

Customers Without Service Contracts

Customers who purchase direct from Cisco but do not hold a Cisco service contract, and customers who purchase through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should acquire upgrades by contacting the Cisco Technical Assistance Center (TAC). TAC contacts are as follows.

  • +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 their product serial number available and be prepared to give the URL of this notice as evidence of entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC.

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

Exploitation and Public Announcements

The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.

This vulnerability was reported to Cisco by Anthony Towry.

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's worldwide website at:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120118-dmm

In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news recipients.

  • cust-security-announce@cisco.com
  • first-teams@first.org
  • bugtraq@securityfocus.com
  • vulnwatch@vulnwatch.org
  • cisco@spot.colorado.edu
  • cisco-nsp@puck.nether.net
  • full-disclosure@lists.grok.org.uk
  • comp.dcom.sys.cisco@newsgate.cisco.com

Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates.


Revision History

 Revision 1.1
 2012-January-19  Updated product descriptions in HTML header.

Revision 1.0

2012-January-18

Initial public release.

Cisco Security Procedures

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


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