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Cisco Security Advisory

Cisco Show and Share Security Vulnerabilities

Advisory ID: cisco-sa-20111019-sns

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20111019-sns

Revision 1.0

For Public Release 2011 October 19 16:00  UTC (GMT)

Related Resources:


Summary

The Cisco Show and Share webcasting and video sharing application contains two vulnerabilities.

The first vulnerability allows an unauthenticated user to access several administrative web pages.

The second vulnerability permits an authenticated user to execute arbitrary code on the device under the privileges of the web server user account.

Cisco has released free software updates that address these vulnerabilities.

There are no workarounds available for these vulnerabilities.

This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20111019-sns.

Note: Effective October 18, 2011, Cisco moved the current list of Cisco Security Advisories and Responses published by Cisco PSIRT. The new location is http://tools.cisco.com/security/center/publicationListing. You can also navigate to this page from the Cisco Products and Services menu of the Cisco Security (SIO) Portal. Following this transition, new Cisco Security Advisories and Responses will be published to the new location. Although the URL has changed, the content of security documents and the vulnerability policy are not impacted. Cisco will continue to disclose security vulnerabilities in accordance with the published Security Vulnerability Policy.

Affected Products

Vulnerable Products

These vulnerabilities affect all versions of Cisco Show and Share prior to the first fixed releases as indicated in the Software Version and Fixes section of this Cisco Security Advisory.

To determine the Cisco Show and Share Software release that an appliance is running, administrators can log in to the Appliance Administrative Interface (AAI), and access the main menu. The software version is identified next to the Cisco Show and Share field. The following example identifies a Cisco Show and Share appliance running version 5.2.2

 Cisco Show and Share Application Administration Interface
                                 Main Menu                                  
   IP: 192.168.0.1                                                         
                                                                            
   Cisco Show and Share 5.2.2                                               
   http://sns.example.com/vportal                                    
                                                                            
                                                                            
                                                                            
        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

The following products are confirmed not vulnerable:

  • Cisco Video Portal

No other Cisco products are currently known to be affected by these vulnerabilities.

Details

Cisco Show and Share is a webcasting and video sharing application that helps organizations create secure video communities to share ideas and expertise, optimize global video collaboration, and personalize the connection between customers, employees, and students with user-generated content.

Cisco Show and Share provides the ability to create live and on-demand video content, and define who can watch specific content. It offers viewer collaboration tools such as commenting, rating, and word tagging, and provides comprehensive access reporting.

Cisco Show and Share contains the following vulnerabilities:

  • Anonymous users can access some administration pages
Several administrative web pages of the Cisco Show and Share can be accessed without prior user authentication. These include pages for accessing Encoders and Pull Configurations, Push Configurations, Video Encoding Formats, and Transcoding

This vulnerability is documented in Cisco Bug ID CSCto73758, (registered customers only) and has been assigned CVE identifier CVE-2011-2584.

  • Cisco Show and Share arbitrary code execution vulnerability
An authenticated user with privileges to upload videos could upload code that could then be executed under the privileges of the web server.
Note: The web server runs as a non-root user.  Details regarding the impact of accessing each one of these administrative pages are included in the Impact section of this Cisco Security Advisory.

This vulnerability is documented in Cisco Bug ID CSCto69857, (registered customers only) and has been assigned CVE identifier CVE-2011-2585.

Vulnerability Scoring Details

Cisco has provided scores for the vulnerabilities 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 .



CSCto73758, : Anonymous users can access some administration pages

Calculate the environmental score of CSCto73758,

CVSS Base Score - 7.5

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

Partial

Partial

Partial

CVSS Temporal Score - 6.2

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed



CSCto69857, : Cisco Show and Share arbitrary code execution vulnerability

Calculate the environmental score of CSCto69857,

CVSS Base Score - 6.5

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

Single

Partial

Partial

Partial

CVSS Temporal Score - 5.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

Impact

These vulnerabilities have the following impact on Cisco Show and Share:

  • CSCto73758: Anonymous users can access some administration pages
    Several administrative web pages of the Cisco Show and Share can be accessed without prior user authentication. The impact of the different administrative web pages include:

    Encoders Configurations
    The Encoders Configuration pages have a direct impact on live events. If all of the encoders from the encoders' configurations are removed, then a live event cannot be created. An encoder or a push configuration is required in order for a live event to be created. This page also reveals information about the encoders, such as Encoder IP Address and associated username.

    Push Configurations
    The Push Configurations and Encoders Configuration pages have a direct impact on live events. If all of the encoders of push configurations are removed, then a live event cannot be created. An encoder or a push configuration is required in order for a live event to be created.

    Video Encoding Formats
    Video encoding formats have a direct impact on the encoders. Even with an encoder or a push configuration configured, if no video format is specified then the encoder cannot encode the video stream for the live event.

    Transcoding
    This page does not have a direct impact on live events or the encoders. This page will only set a task to be executed for transcoding. Transcoding is a process of deriving digital media files that use one codec from digital media files that use a different codec; the source file is not changed or destroyed. If all tasks are removed the set task for transcoding will not be executed.

  • CSCto69857: Cisco Show and Share arbitrary code execution vulnerability
    An authenticated user may upload arbitrary code that can be executed on the appliance with the same privileges as the web server.

Software Versions and Fixes

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.

Each row of the software table (below) names a Cisco SnS release train. If a given release train is vulnerable, then the earliest possible releases that contains the fix (along with the anticipated date of availability for each, if applicable) are listed in the "First Fixed Release" column of the table. The "Recommended Release" column indicates the releases which have fixes for all the published vulnerabilities at the time of this Advisory. A device running a release in the given train that is earlier than the release in a specific column (less than the First Fixed Release) is known to be vulnerable. Cisco recommends upgrading to a release equal to or later than the release in the "Recommended Releases" column of the table.

Each row of the software table (below) names a Cisco Show and Share release train. If a given release train is vulnerable, then the earliest possible releases that contains the fix are listed in the "First Fixed Release" column of the table. A device running a release in the given train that is earlier than the "First Fixed Release" is known to be vulnerable. Cisco recommends upgrading to a release equal to or later than the release in the "First Fixed Release" column of the table.

WARNING: Please read the release notes on Cisco Show and Share version 5.2(3) regarding MCS Server Appliance support.

The following MCS Server Appliances are not supported in Cisco Show and Share version 5.2(3), and administrators should use a recommended release of 5.2(2.1) or later:

  • MCS 7825-H2
  • MCS 7825-H3
  • MCS 7835-H1
  • MCS 7835-H2

For further information for support MCS Server Appliances consult the release notes for Cisco Digital Media Suite 5.2.x at the following link: http://www.cisco.com/en/US/docs/video/digital_media_systems/5_x/5_2/dms/release/notes/dms52rn.html#wp232018

Cisco Show and Share Release First Fixed Release
5(2) Vulnerable; migrate to 5.2(2.1)
5.2(1) Vulnerable; migrate to 5.2(2.1)
5.2(2) 5.2(2.1)
5.2(3) Not Vulnerable

Note: Read the WARNING provided above regarding Cisco Show and Share version 5.2(3).

Cisco Show and Share software upgrades, can be download from: http://www.cisco.com/cisco/software/type.html?mdfid=280171242&catid=268438145


Workarounds

There are no workarounds for these vulnerabilities.

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.

These vulnerabilities were discovered and reported to Cisco Systems by Andy Yang and Mehdi Kiani of stratsec.

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-20111019-sns

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 1.0

2011-October-19

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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