Summary

• Multiple vulnerabilities exist in the Cisco TelePresence solution; each component of the solution is addressed independently in its own advisory. This advisory addresses Cisco TelePresence endpoint devices and details the following vulnerabilities:

  • Unauthenticated Common Gateway Interface (CGI) Access
    
  • CGI Command Injection
    
  • TFTP Information Disclosure
    
  • Malicious IP Address Injection
    
  • XML-Remote Procedure Call (RPC) Command Injection
    
  • Cisco Discovery Protocol Remote Code Execution
    

  Duplicate Issue Identification in Other Cisco TelePresence Advisories

  The Cisco Discovery Protocol Remote Code Execution vulnerability affects Cisco TelePresence endpoint devices, Manager, Multipoint Switch, and Recording Server. The defect that is related to each component is covered in each associated advisory. The Cisco bug IDs for these defects are as follows:

  • Cisco TelePresence endpoint devices (CSCtd75754)
    
  • Cisco TelePresence Manager (CSCtd75761)
    
  • Cisco TelePresence Multipoint Switch (CSCtd75766)
    
  • Cisco TelePresence Recording Server (CSCtd75769)
    

  This advisory is posted at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110223-telepresence-cts.

Affected Products

• One or more of these vulnerabilities affect all Cisco TelePresence endpoint systems that are running a release of Cisco TelePresence software prior to 1.7.1.

  The following table provides information that pertains to affected software releases:

  Description	Cisco Bug ID	Affected Software Releases
  Unauthenticated CGI Access	CSCtb31640	1.2.x, 1.3.x, 1.4.x, 1.5.x
  CGI Command Injection	CSCtb31685	1.2.x, 1.3.x, 1.4.x, 1.5.x
  CGI Command Injection	CSCtb31659	1.2.x, 1.3.x, 1.4.x, 1.5.x
  CGI Command Injection	CSCth24671	1.2.x, 1.3.x, 1.4.x, 1.5.x, 1.6.x
  TFTP Information Disclosure	CSCte43876	1.2.x, 1.3.x, 1.4.x, 1.5.x, 1.6.0, 1.6.1
  Malicious IP Address Injection	CSCth03605	1.2.x, 1.3.x, 1.4.x, 1.5.x, 1.6.x
  XML-RPC Command Injection	CSCtb52587	1.2.x, 1.3.x, 1.4.x, 1.5.x
  Cisco Discovery Protocol Remote Code Execution	CSCtd75754	1.2.x, 1.3.x, 1.4.x, 1.5.x, 1.6.x

  Vulnerable Products

  The following Cisco TelePresence endpoint systems that are running an affected version of software are vulnerable: Cisco TelePresence System 500 Series, 1300 Series, 3000 Series, and 3200 Series and Cisco TelePresence System 1000 and 1100.

  To determine the current version of software that is running on the endpoint, access the device via SSH and issue the show version command. The output should resemble the following example. The version that is active on the system will be marked by an asterisk character (*).

  admin: show version
  primary
     Factory   CTS 1.4.2(2194) 
    *Slot 1    CTS 1.7.1(4750) P1 
     Slot 2    CTS 1.6.2(2835) P1 
  admin:

  In the preceding example, the system has versions 1.4.2, 1.6.2, and 1.7.1 loaded on the device and version 1.7.1 is currently active. A device is affected only by vulnerabilities that are present 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 solution allows for immersive, in-person communication and collaboration over the network with colleagues, prospects, and partners even when they are located in opposite hemispheres.

  This security advisory describes multiple distinct vulnerabilities in affected software versions that are running on Cisco TelePresence endpoint devices.

  Unauthenticated CGI Access

  Multiple CGI command injection vulnerabilities exist in Cisco TelePresence endpoint devices that could allow a remote, unauthenticated attacker to execute arbitrary commands with elevated privileges. To exploit these vulnerabilities, an attacker must submit a malformed request to an affected device via TCP port 8082.

  An attacker must perform a three-way TCP handshake and establish a valid session to exploit this vulnerability.

  • Cisco TelePresence endpoint - CSCtb31640 ( registered customers only) has been assigned the CVE identifier CVE-2011-0372
    

  CGI Command Injection

  Multiple CGI command injection vulnerabilities exist in Cisco TelePresence endpoint devices that could allow a remote, authenticated attacker to execute arbitrary commands with elevated privileges. To exploit these vulnerabilities, an attacker must submit a malformed request to an affected device via TCP port 443.

  An attacker must perform a three-way TCP handshake and establish a valid session to exploit these vulnerabilities:

  • Cisco TelePresence endpoint - CSCtb31685 ( registered customers only) has been assigned the CVE identifier CVE-2011-0373.
    
  • Cisco TelePresence endpoint - CSCtb31659 ( registered customers only) has been assigned the CVE identifier CVE-2011-0374.
    
  • Cisco TelePresence endpoint - CSCth24671 ( registered customers only) has been assigned the CVE identifier CVE-2011-0375.
    

  TFTP Information Disclosure

  An information disclosure vulnerability exists within Cisco TelePresence endpoint devices that could allow an unauthenticated, remote attacker to retrieve sensitive authentication and configuration information. The attacker would need to have the ability to submit a TFTP GET request via UDP port 69 to the affected device.

  Because the vulnerability is within a UDP based service, the attacker would not be required to perform a handshake prior to making the crafted request. However, due to the fact that this is an information disclosure issue the attacker would need to supply a valid return IP address to retrieve the information.

  • Cisco TelePresence endpoint - CSCte43876 ( registered customers only) has been assigned the CVE identifier CVE-2011-0376.
    

  Malicious IP Address Injection

  A denial of service vulnerability exists within Cisco TelePresence endpoint devices that could allow a remote, unauthenticated attacker to cause a denial of service condition. An attacker with the ability to impersonate a Cisco TelePresence Manager system could remotely inject an invalid IP address into a configuration file that could cause a critical service on the device to crash. An endpoint affected by this issue will remain unusable until it has been manually restored to a known good state. Restoration of service may require an administrator to reload software on the affected device. The attacker would need the ability to submit a malformed SOAP request to an affected device via TCP port 8081 or TCP port 9501.

  An attacker must perform a three-way TCP handshake and establish a valid session to exploit this vulnerability.

  • Cisco TelePresence endpoint - CSCth03605 ( registered customers only) has been assigned the CVE identifier CVE-2011-0377.
    

  XML-RPC Command Injection

  An XML-RPC command injection vulnerability exists with Cisco TelePresence endpoint devices. This issue could allow an unauthenticated attacker with access to the broadcast domain of the affected device to execute arbitrary commands with elevated privileges. The attacker would need the ability to submit a request to an affected system via TCP port 61441 or TCP port 61445.

  An attacker must perform a three-way TCP handshake and establish a valid session to exploit this vulnerability. The issue may require that the attacker perform an ARP spoofing or other form of impersonation attack.

  • Cisco TelePresence endpoint - CSCtb52587 ( registered customers only) has been assigned the CVE identifier CVE-2011-0378.
    

  Cisco Discovery Protocol Remote Code Execution

  A remote code execution vulnerability exists in Cisco TelePresence endpoint devices. This vulnerability could allow an unauthenticated, adjacent attacker to trigger a buffer overflow condition. To exploit this vulnerability, the attacker must submit a malicious Cisco Discovery Protocol packet to an affected system.

  Because Cisco Discovery Protocol functions at the Data-Link (L2) layer, an attacker must submit an Ethernet frame directly to an affected device. This scenario may be possible when affected systems are part of a bridged network or connected to a nonpartitioned device such as a network hub.

  • Cisco TelePresence endpoint - CSCtd75754 ( registered customers only) has been assigned the CVE identifier CVE-2011-0379.
    

Workarounds

• There are no device- or system-based workarounds for the identified vulnerabilities.

  Additional mitigations that can be deployed on Cisco devices in the network are available in the Cisco Applied Intelligence companion document for this advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20110223-telepresence

Fixed Software

• 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 following Cisco TelePresence System Software table defines a specific defect, the first fixed release, and the recommended release to resolve all the security issues identified in this advisory as well as other non-security-related issues. Cisco recommends upgrading to a release equal to or later than the release in the Recommended Release column of the table.

  Vulnerability	Bug ID	Component	First Fixed Version	Recommended Release
  Unauthenticated CGI Access	CSCtb31640	Cisco TelePresence endpoint	1.6.0	1.7.1
  CGI Command Injection	CSCtb31685	Cisco TelePresence endpoint	1.6.0	1.7.1
  	CSCtb31659	Cisco TelePresence endpoint	1.6.0	1.7.1
  	CSCth24671	Cisco TelePresence endpoint	1.7.0	1.7.1
  TFTP Information Disclosure	CSCte43876	Cisco TelePresence endpoint	1.6.2	1.7.1
  Malicous IP Address Injection	CSCth03605	Cisco TelePresence endpoint	1.6.0	1.7.1
  XML-RPC Command Injection	CSCtb52587	Cisco TelePresence endpoint	1.6.0	1.7.1
  Cisco Discovery Protocol Remote Code Execution	CSCtd75754	Cisco TelePresence endpoint	1.7.0	1.7.1

  Cisco recommends that customers upgrade all components of the Cisco TelePresence solution to 1.7.1 or later.

Exploitation and Public Announcements

• The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

  All vulnerabilities identified in this Cisco Security Advisory were discovered internally by Cisco.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110223-telepresence-cts

Revision History

• Revision 1.0

  2011-February-23

  Intial public release.

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