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Advisory ID: cisco-sa-20140430-tcte

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140430-tcte

Revision 1.0

For Public Release 2014 April 30 16:00  UTC (GMT)


Summary

Cisco TelePresence TC and TE Software are affected by the following vulnerabilities:

  • Six Session Initiation Protocol (SIP) denial of service vulnerabilities
  • Cisco TelePresence TC and TE Software DNS Buffer Overflow Vulnerability
  • Cisco TelePresence TC and TE Software Input Validation Vulnerability
  • Cisco TelePresence TC and TE Software tshell Command Injection Vulnerability
  • Cisco TelePresence TC and TE Software Heap Overflow Vulnerability
  • Cisco TelePresence TC and TE Software U-Boot Buffer Overflow Vulnerability
  • Cisco TelePresence TC and TE Software Unauthenticated Serial Port Access Vulnerability
  • Cisco TelePresence TC H.225 Denial of Service Vulnerability
Successful exploitation of these vulnerabilities could allow an attacker to cause the affected system to reload, execute arbitrary commands or obtain privileged access to the affected system.

Note: This security advisory does not provide information about the OpenSSL TLS Heartbeat Read Overrun Vulnerability identified by CVE-2014-0160 (also known as Heartbleed).  For additional information on Cisco products affected by the Heartbleed vulnerability, refer to the Cisco Security Advisory available at the following link:  http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140409-heartbleed


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-20140430-tcte

Affected Products

Vulnerable Products

The following products running a vulnerable version of Cisco TelePresence TC or TE Software are affected by the vulnerabilities described in this advisory:
  • Cisco TelePresence MX Series
  • Cisco TelePresence System EX Series
  • Cisco TelePresence Integrator C Series
  • Cisco TelePresence Profiles Series
  • Cisco TelePresence Quick Set Series
  • Cisco TelePresence System T Series
  • Cisco TelePresence VX Clinical Assistant

Products Confirmed Not Vulnerable

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

Details

Multiple SIP Denial of Service Vulnerabilities

Multiple vulnerabilities in the SIP code of Cisco TelePresence TC and TE Software could allow an unauthenticated, remote attacker to cause the affected system to become unresponsive and reload.
These vulnerabilities are due to improper handling of crafted or malformed SIP packets. An attacker could exploit this vulnerability by sending the crafted packets to the affected system.

These vulnerabilities can be triggered by SIP messages sent via UDP or TCP. Messages sent via Transport Layer Security (TLS) will also be affected. The default ports for UDP and TCP deployments are UDP port 5060 and TCP port 5060. The default port for TLS deployment is TCP port 5061.

These vulnerabilities are documented in Cisco bug IDs CSCud29566 (registered customers only), CSCua64961 (registered customers only), CSCuj94651 (registered customers only), CSCtq72699 (registered customers only), CSCto70562 (registered customers only), and CSCua86589 (registered customers only).


The vulnerabilities have been assigned the following Common Vulnerabilities and Exposures (CVE) IDs: CVE-2014-2162, CVE-2014-2163, CVE-2014-2164, CVE-2014-2165, CVE-2014-2166 and CVE-2014-2167.

Cisco TelePresence TC and TE Software DNS Buffer Overflow Vulnerability

A vulnerability in the implementation of the DNS code of Cisco TelePresence TC and TE Software could allow an unauthenticated, remote attacker to create a buffer overflow and execute arbitrary code.

The vulnerability is due to insufficient bounds check on variables. An attacker could exploit this vulnerability by injecting crafted DNS response packets.

This vulnerability is documented in Cisco bug ID CSCty44804 (registered customers only) and has been assigned CVE ID CVE-2014-2168.

Cisco TelePresence TC and TE Software Input Validation Vulnerability

A vulnerability in the implementation of internal system scripts of the Cisco TelePresence TC and TE Software could allow an authenticated, remote attacker to inject arbitrary commands that are executed with the privilege of the root user.

The vulnerability is due to the improper validation of parameters passed to the affected system scripts. An attacker could exploit this vulnerability by passing arbitrary commands as arguments to the affected scripts.

This vulnerability is documented in Cisco bug ID CSCue60211 (registered customers only) and has been assigned CVE ID CVE-2014-2169.

Cisco TelePresence TC and TE Software tshell Command Injection Vulnerability

A vulnerability in the implementation of several system scripts of Cisco TelePresence TC and TE Software could allow an authenticated, remote attacker to inject arbitrary commands with the privileges of the root user via tshell (tcsh).

The vulnerability is due to the improper implementation of the code in several scripts that can be executed on the affected system. An attacker could exploit this vulnerability by passing arbitrary commands while executing the affected scripts.

This vulnerability is documented in Cisco bug ID CSCue60202 (registered customers only)  and has been assigned CVE ID CVE-2014-2170.

Cisco TelePresence TC and TE Software Heap Overflow Vulnerability

A vulnerability in the SIP code of Cisco TelePresence TC and TE Software could allow an unauthenticated, remote attacker to create a heap overflow condition. This condition could allow the attacker to execute arbitrary code or cause the affected system to reload.
The vulnerability is due to improper handling of crafted SIP packets. An attacker could exploit this vulnerability by sending crafted SIP packets to the affected system.


This vulnerability can be triggered by SIP messages sent via UDP or TCP. Messages sent via Transport Layer Security (TLS) will also be affected. The default ports for UDP and TCP deployments are UDP port 5060 and TCP port 5060. The default port for TLS deployment is TCP port 5061.

This vulnerability is documented in Cisco bug ID CSCud81796 (registered customers only) and has been assigned CVE ID CVE-2014-2171.

Cisco TelePresence TC and TE Software U-Boot Buffer Overflow Vulnerability

A vulnerability in the implementation of executable utilities that use the universal bootloader (u-boot) compiler of Cisco TelePresence TC and TE Software could allow an authenticated, local attacker to create a buffer overflow and possibly execute arbitrary code on the affected system.
The vulnerability is due to the improper implementation of internal executable files when the u-boot compiler flag is defined. An attacker could exploit this vulnerability by accessing the affected system command-line interface (CLI) and try to run the affected executable files.


This vulnerability is documented in Cisco bug ID CSCub67693 (registered customers only) and has been assigned CVE ID CVE-2014-2172.

Cisco TelePresence TC and TE Software Unauthenticated Serial Port Access Vulnerability

A vulnerability in the authentication code of Cisco TelePresence TC and TE Software could allow an unauthenticated, local attacker to connect to the serial port and obtain privileged access to the affected system.
The vulnerability is due to the improper implementation of authentication and authorization controls for the serial port. An attacker could exploit this vulnerability by connecting to the affected port and run a series of commands.


This vulnerability is documented in Cisco bug ID CSCub67692 (registered customers only) and has been assigned CVE ID CVE-2014-2173.


Cisco TelePresence TC H.225 Denial of Service Vulnerability

A vulnerability in the H.225 code of Cisco TelePresence TC Software could allow an unauthenticated, remote attacker to cause the affected system to exhaust the available memory and to reload.

The vulnerability is due to the improper handling of crafted or malformed H.225 packets. An attacker could exploit this vulnerability by sending crafted packets to the affected system.



This vulnerability is documented in Cisco bug ID CSCtq78849 (registered customers only) and has been assigned CVE ID CVE-2014-2175.

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



CSCud29566, CSCua64961, CSCuj94651, CSCtq72699, CSCto70562, and CSCua86589 - Multiple SIP Denial Of Service Vulnerabilities

Calculate the environmental score of CSCud29566, CSCua64961, CSCuj94651, CSCtq72699, CSCto70562, and CSCua86589

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




CSCty44804 - Cisco TelePresence TC and TE Software DNS Buffer Overflow Vulnerability

Calculate the environmental score of CSCty44804

CVSS Base Score - 7.6

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

High

None

Complete

Complete

Complete

CVSS Temporal Score - 6.3

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCue60211 - Cisco TelePresence TC and TE Software Input Validation Vulnerability

Calculate the environmental score of CSCue60211

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




CSCue60202 - Cisco TelePresence TC and TE Software tshell Command Injection Vulnerability

Calculate the environmental score of CSCue60202

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




CSCud81796 - Cisco TelePresence TC and TE Software Heap Overflow Vulnerability

Calculate the environmental score of CSCud81796

CVSS Base Score - 10.0

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

Complete

Complete

Complete

CVSS Temporal Score - 8.3

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCub67693 - Cisco TelePresence TC and TE Software U-Boot Buffer Overflow Vulnerability

Calculate the environmental score of CSCub67693

CVSS Base Score - 6.6

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Local

Medium

Single

Complete

Complete

Complete

CVSS Temporal Score - 5.5

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCub67692 - Cisco TelePresence TC and TE Software Unauthenticated Serial Port Access Vulnerability

Calculate the environmental score of CSCub67692

CVSS Base Score - 7.2

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Local

Low

None

Complete

Complete

Complete

CVSS Temporal Score - 6.0

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed



CSCtq78849 - Cisco TelePresence TC H.225 Denial of Service Vulnerability 

Calculate the environmental score of CSCtq78849

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


Impact

Successful exploitation of these vulnerabilities could allow an attacker to cause the affected system to reload, execute arbitrary commands or obtained privileged access to the affected system.

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.

Note: This security advisory does not provide information about the OpenSSL TLS Heartbeat Read Overrun Vulnerability identified by CVE-2014-0160 (also known as Heartbleed).
For additional information regarding Cisco products affected by this vulnerability, refer to the Cisco Security Advisory available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140409-heartbleed

Customer are advise to read the Cisco Security Advisory concerning the Heartbleed vulnerability before determining to which software release to upgrade.

The following table lists the first fixed release for each of the Cisco TelePresence TC and TE Software versions. The last row indicates the releases that resolve all the vulnerabilities described in this advisory:

  Cisco TelePresence TC and TE  Software First Fixed 4.x Cisco TelePresence TC First Fixed 5.x Cisco TelePresence TC First Fixed 6.x
Cisco TelePresence TE First Fixed 6.0
 
Cisco TelePresence TC First Fixed 7.x
Cisco TelePresence TC and TE Software SIP Denial of Service Vulnerability - CSCud29566 Migrate to TC 6.x or later Migrate to TC 6.x or later Not Affected Migrate to TC 6.x or later Not Affected
Cisco TelePresence TC and TE Software SIP Denial of Service Vulnerability - CSCua64961 Migrate to TC 6.x or later Migrate to TC 6.x or later Not Affected  Not Affected Not Affected
Cisco TelePresence TC and TE Software SIP Denial of Service Vulnerability - CSCuj94651 Migrate to TC 6.x or later Migrate to TC 6.x or later Not Affected Migrate to TC 6.x or later Not Affected
Cisco TelePresence TC and TE Software SIP Denial of Service Vulnerability - CSCtq72699 Migrate to TC 6.x or later Migrate to TC 6.x or later Not Affected  Migrate to TC 6.x or later Not Affected
Cisco TelePresence TC and TE Software SIP Denial of Service Vulnerability - CSCto70562 Migrate to TC 5.x or later Not Affected Not Affected  Not Affected
Not Affected
Cisco TelePresence TC and TE Software SIP Denial of Service Vulnerability - CSCua86589 Migrate to TC 6.x or later Migrate to TC 6.x or later Not Affected Migrate to TC 6.x or later Not Affected
Cisco TelePresence TC and TE Software DNS Buffer Overflow Vulnerability - CSCty44804 Migrate to TC 6.x or later Migrate to TC 6.x or later Not Affected Migrate to TC 6.x or later
Not Affected
Cisco TelePresence TC and TE Software Input Validation Vulnerability - CSCue60211 Migrate to TC 6.x or later Migrate to TC 6.x or later TC 6.2.0  Migrate to TC 6.x or later
Not Affected
Cisco TelePresence TC and TE Software tshell Command Injection Vulnerability - CSCue60202 Migrate to TC 5.x or later 5.1.7 TC 6.0.1 Migrate to TC 6.x or later
Not Affected
Cisco TelePresence TC and TE Software Heap Overflow Vulnerability - CSCud81796 Migrate to TC 6.x or later Migrate to TC 6.x or later TC 6.0.1  TE 6.0.2 Not Affected
Cisco TelePresence TC and TE Software U-Boot Buffer Overflow Vulnerability - CSCub67693 Migrate to TC 6.x or later Migrate to TC 6.x or later Not Affected Migrate to TC 6.x or later Not Affected
Cisco TelePresence TC and TE Software Unauthenticated Serial Port Access Vulnerability  - CSCub67692 Migrate to TC 6.x or later Migrate to TC 6.x or later Not Affected Migrate to TC 6.x or later Not Affected
Cisco TelePresence TC H.225 Denial of Service Vulnerability  - CSCtq78849 Migrate to TC 6.x or later Migrate to TC 6.x or later Not Affected Migrate to TC 6.x or later Not Affected
 Releases that fix all the vulnerabilities in this advisory Migrate to TC 6.x or later Migrate to TC 6.x or later TC 6.3.1 Migrate to TC 6.x or later  TC 7.1.1

Workarounds

There are no workarounds that mitigate these vulnerabilities.

Obtaining Fixed Software

Cisco has released free software updates that address the vulnerabilities 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 discovered during internal testing or during the resolution of support cases.

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-20140430-tcte

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 2014-April-30 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.