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Cisco Security Advisory

Multiple Vulnerabilities in Cisco TelePresence Multipoint Switch

Advisory ID: cisco-sa-20120711-ctms

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120711-ctms

Revision 1.0

For Public Release 2012 July 11 16:00  UTC (GMT)

Related Resources:


Summary

Cisco TelePresence Multipoint Switch contains the following vulnerabilities:

  • Cisco TelePresence Malformed IP Packets Denial of Service Vulnerability
  • Cisco TelePresence Cisco Discovery Protocol Remote Code Execution Vulnerability
Exploitation of the Cisco TelePresence Malformed IP Packets Denial of Service Vulnerability may allow an unauthenticated, remote attacker to create a denial of service (DoS) condition, causing the product to become unresponsive to new connection requests and potentially leading to termination services and processes.

Exploitation of the Cisco TelePresence Cisco Discovery Protocol Remote Code Execution Vulnerability may allow an unauthenticated, adjacent attacker to execute arbitrary code with elevated privileges.

Cisco has released free software updates that address these vulnerabilities. There are no workarounds that mitigate these vulnerabilities. This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120711-ctms

Affected Products


Vulnerable Products

Cisco TelePresence Manager, Cisco TelePresence Recording Server, Cisco TelePresence Multipoint Switch and Cisco TelePresence Immersive Endpoint System may be affected by the vulnerabilities that are described in this security advisory. The following tables contain specific information for each vulnerability. For specific information regarding affected code, refer to the "Software Versions and Fixes" of this security advisory.

Cisco Telepresence Malformed IP Packets Denial Of Service Vulnerability

Product Affected
Cisco TelePresence Manager YES
Cisco TelePresence Recording Server YES
Cisco TelePresence Multipoint Switch YES
Cisco TelePresence Immersive Endpoint System
NO

Cisco TelePresence Cisco Discovery Protocol Remote Code Execution Vulnerability

Product Affected
Cisco TelePresence Manager YES
Cisco TelePresence Recording Server YES
Cisco TelePresence Multipoint Switch YES
Cisco TelePresence Immersive Endpoint System YES


Detailed Information about Vulnerable Products

This security advisory describes vulnerabilities in the Cisco TelePresence Multipoint Switch. For additional information regarding how the vulnerabilities may affect other vulnerable products, please refer to the specific product security advisory listed in following table:

Product Security Advisory Publication Link
Cisco TelePresence Recording Server http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120711-ctrs
Cisco TelePresence Manager http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120711-ctsman
Cisco TelePresence Immersive Endpoint System
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120711-cts

How to Determine the Software Version

Cisco TelePresence Multipoint Switch devices that are running an affected version of software are vulnerable.

To determine the current version of software that is running on the Cisco TelePresence Multipoint Switch, establish an SSH connection to the device and issue the show version active and the show version inactive commands. The output should resemble the following example:

admin: show version active
Active Master Version: 1.7.0.0-471

Active Version Installed Software Options: 
No Installed Software Options Found.

admin: show version inactive
Inactive Master Version: 1.6.0.0-342

Inactive Version Installed Software Options: 
No Installed Software Options Found.

In the preceding example, the system has versions 1.6.0 and 1.7.0 loaded on the device, and version 1.7.0 is currently active. A device is affected only by vulnerabilities that are in the active software version.

Products Confirmed Not Vulnerable

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

Details

The Cisco TelePresence Multipoint Switch is designed to support multipoint (multi-location) Cisco TelePresence meetings for multiple segments in a single meeting.

This section provides additional information for each vulnerability that affects Cisco TelePresence Multipoint Switch.

Cisco TelePresence Malformed IP Packets Denial of Service Vulnerability

A vulnerability exists in the network stack of the operating system that could allow an unauthenticated, remote attacker to create a denial of service condition, preventing the device from responding to new connection requests and potentially leading to the crash of some of the services and processes. The vulnerability is due to improper handling of malformed IP packets and TCP connection requests or terminations sent at a high rate. An attacker could exploit this vulnerability by sending a specially crafted sequence of malformed IP packets or TCP segments at a high rate.

This vulnerability is documented in Cisco bug IDs CSCty11219 (registered customers only), CSCty11299 (registered customers only), CSCty11323 (registered customers only) and CSCty11338 (registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2012-3073.

Cisco TelePresence Cisco Discovery Protocol Remote Code Execution Vulnerability

A remote code execution vulnerability in the implementation of the Cisco Discovery Protocol component could allow an unauthenticated, adjacent attacker to execute arbitrary code with elevated privileges. The vulnerability is due to a failure to properly handle malformed Cisco Discovery Protocol packets.  An attacker could exploit this vulnerability by passing malformed Cisco Discovery Protocol packets to an affected device.  Successful exploitation of this vulnerability could allow the attacker to execute arbitrary code with elevated privileges.

Because Cisco Discovery Protocol works at the data link layer (Layer 2), an attacker must have a way to submit an Ethernet frame directly to an affected device. This action may be possible in situations where the affected system is part of a bridged network or connected to a non partitioned device, such as a network hub.


This vulnerability is documented in Cisco bug ID
CSCtz40965 (registered customers only) and has been assigned CVE ID CVE-2012-2486

Vulnerability Scoring Details

Cisco has scored the vulnerabilities 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



CSCty11219, CSCty11299, CSCty11323 and CSCty11338

Calculate the environmental score of CSCty11219, CSCty11299, CSCty11323 and CSCty11338

CVSS Base Score - 7.8

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

None

None

Complete

CVSS Temporal Score - 6.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCtz40965

Calculate the environmental score of CSCtz40965

CVSS Base Score - 8.3

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Adjacent Network

Low

None

Complete

Complete

Complete

CVSS Temporal Score - 6.9

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed


Impact

Successful exploitation of the vulnerabilities may cause a DoS condition where the product becomes unresponsive to new connection requests and potentially leading to termination services and processes or to execute arbitrary code with elevated privileges.

Software Versions and Fixes

This section provides details about affected releases and remediation for each vulnerabilities that affects Cisco TelePresence Multipoint Switch.

Cisco TelePresence Malformed IP Packets Denial of Service Vulnerability

Version First Fixed In
Prior to 1.6
1.8.1
1.6
1.8.1
1.7
1.8.1
1.8
1.8.1
1.9  Not Vulnerable

Cisco TelePresence Cisco Discovery Protocol Remote Code Execution Vulnerability

Version First Fixed In
Prior to 1.6
1.9.0
1.6
1.9.0
1.7
1.9.0
1.8
1.9.0
1.9 Not Vulnerable

 

Recommended Releases

The following table gives information about the releases that contains the fixes for all the vulnerabilities that are described in this security advisory:

 

Version Recommended Release
Prior to 1.6
Upgrade to 1.9.0
1.6
Upgrade to 1.9.0
1.7
Upgrade to 1.9.0
1.8
Upgrade to 1.9.0

When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses 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.


Workarounds

There are no workarounds that mitigate these vulnerabilities.

Obtaining Fixed Software

Cisco has released free software updates that address the vulnerabilities that are 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 vulnerabilities that are described in this advisory.

These vulnerabilities were found during Cisco internal tests.

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 the Cisco Security Intelligence Operations portal at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120711-ctms

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 2012-July-11 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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