Summary

• Multiple vulnerabilities exist within the Cisco TelePresence Multipoint Switch. This security advisory outlines details of the following vulnerabilities:

  • Unauthenticated Java Servlet Access
    
  • Unauthenticated Arbitrary File Upload
    
  • Cisco Discovery Protocol Remote Code Execution
    
  • Unauthorized Servlet Access
    
  • Java RMI Denial of Service
    
  • Real-Time Transport Control Protocol Denial of Service
    
  • XML-Remote Procedure Call (RPC) Denial of Service
    

  Duplicate Issue Identification in Other Cisco TelePresence Advisories

  The Unauthenticated Java Servlet Access vulnerability affects the Cisco TelePresence Multipoint Switch and Recording Server. The defect as related to each component is covered in each associated advisory. The Cisco bug IDs for these defects are as follows:

  • Cisco TelePresence Multipoint Switch - CSCtf42008
    
  • Cisco TelePresence Recording Server - CSCtf42005
    

  The Unauthenticated Arbitrary File Upload vulnerability affects the Cisco TelePresence Multipoint Switch and Recording Server. The defect as related to each component is covered in each associated advisory. The Cisco bug IDs for these defects are as follows:

  • Cisco TelePresence Multipoint Switch - CSCth61065
    
  • Cisco TelePresence Recording Server - CSCth85786
    

  The Cisco Discovery Protocol Remote Code Execution vulnerability affects Cisco TelePresence endpoint devices, Manager, Multipoint Switch, and Recording Server. The defect as 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
    

  The Java RMI Denial of Service vulnerability affects the Cisco TelePresence Multipoint Switch and Recording Server. The defect as related to each component is covered in each associated advisory. The Cisco bug IDs for these defects are as follows:

  • Cisco TelePresence Multipoint Switch - CSCtg35830
    
  • Cisco TelePresence Recording Server - CSCtg35825
    

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

Affected Products

• These vulnerabilities affect the Cisco TelePresence Multipoint Switch. All releases of Cisco TelePresence System Software prior to 1.7.1 are affected by one or more of the vulnerabilities listed in this advisory.

  The following table provides information pertaining to affected software releases:

  Description	Cisco Bug ID	Affected Software Releases
  Unauthenticated Java Servlet Access	CSCtf01253	1.0.x, 1.1.x, 1.5.x, 1.6.x
  Unauthenticated Java Servlet Access	CSCtf42008	1.0.x, 1.1.x, 1.5.x, 1.6.x
  Unauthenticated Arbitrary File Upload	CSCth61065	1.0.x, 1.1.x, 1.5.x, 1.6.x
  Cisco Discovery Protocol Remote Code Execution	CSCtd75766	1.0.x, 1.1.x, 1.5.x, 1.6.x
  Unauthorized Servlet Access	CSCtf97164	1.0.x, 1.1.x, 1.5.x, 1.6.x
  Java RMI Denial of Service	CSCtg35825	1.0.x, 1.1.x, 1.5.x, 1.6.x
  Real-Time Transport Control Protocol Denial of Service	CSCth60993	1.0.x, 1.1.x, 1.5.x, 1.6.x
  XML-RPC Denial of Service	CSCtj44534	1.0.x, 1.1.x, 1.5.x, 1.6.x, 1.7.0, 1.7.1

  Vulnerable Products

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

  To determine the current version of software 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: 1.6.1.0-336
  
  Inactive Version Installed Software Options: 
  No Installed Software Options Found.

  In the preceding example, the system has versions 1.6.1 and 1.7.0 loaded on the device and version 1.7.0 is currently active. A device is only affected by vulnerabilities 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 the Cisco TelePresence Multipoint Switch. These vulnerabilities are independent of each other.

  Unauthenticated Java Servlet Access

  A number of sensitive Java Servlets delivered via a Java Servlet framework in the Cisco Telepresence Multipoint Switch could allow a remote, unauthenticated attacker to perform actions that should be restricted to administrative users only. The attacker would need the ability to submit a crafted request to an affected device on TCP port 80, 443, or 8080.

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

  • CTMS - CSCtf42008 ( registered customers only) has been assigned the CVE identifier CVE-2011-0383.
    
  • CTMS - CSCtf01253 ( registered customers only) has been assigned the CVE identifier CVE-2011-0384.
    

  Unauthenticated Arbitrary File Upload

  An arbitrary file upload vulnerability exists in the administrative web interface of the Cisco TelePresence Multipoint Switch. An unauthenticated, remote attacker could submit a crafted request to an affected device that would allow for the placement of attacker-controlled content in arbitrary locations on the device. The attacker would need the ability to submit a crafted request to an affected device on TCP port 80 or 443.

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

  • CTMS - CSCth61065 ( registered customers only) has been assigned the CVE identifier CVE-2011-0385.
    

  Cisco Discovery Protocol Remote Code Execution

  A remote code execution vulnerability exists in Cisco TelePresence Multipoint Switch devices. An unauthenticated, adjacent attacker could exploit the vulnerability by submitting a malicious Cisco Discovery Protocol packet to the affected system. When parsed, the malicious packet may trigger a buffer overflow.

  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 may be possible in situations where the affected system is part of a bridged network or connected to a nonpartitioned device such as a network hub.

  • CTMS - CSCtd75766 ( registered customers only) has been assigned the CVE identifier CVE-2011-0379.
    

  Unauthorized Servlet Access

  An unauthorized servlet access issue exists in the administrative web interface of Cisco TelePresence Multipoint Switch devices. This issue could allow a remote, authenticated attacker with unprivileged access to cause a denial of service condition on an affected device. The attacker would need the ability to submit a crafted request to an affected device on TCP port 80 or 443.

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

  • CTMS - CSCtf97164 ( registered customers only) has been assigned the CVE identifier CVE-2011-0387.
    

  Java RMI Denial of Service

  A denial of service vulnerability exists in Cisco TelePresence Multipoint Switch devices due to a failure to properly restrict access to the RMI interface of the Java Servlet framework. An unauthenticated, remote attacker could trigger an out-of-memory condition on the servlet host by issuing a series of crafted requests. The attacker would need the ability to communicate to an affected device on TCP port 8999.

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

  • CTMS - CSCtg35825 ( registered customers only) has been assigned the CVE identifier CVE-2011-0388.
    

  Real-Time Transport Control Protocol Denial of Service

  A Real-Time Transport Control Protocol (RTCP) denial of service vulnerability exists within Cisco TelePresence Multipoint Switch devices. An unauthenticated, remote attacker could send a malicious RTCP packet to a listening RTCP control port to crash the call control process. The attacker would need to have the ability to communicate to an affected device on a UDP port that was randomly selected and negotiated during call setup.

  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. This could allow the attacker to spoof the source address of an attack.

  • CTMS - CSCth60993 ( registered customers only) has been assigned the CVE identifier CVE-2011-0389.
    

  XML-RPC Denial of Service

  An XML-RPC denial of service vulnerability exists in Cisco TelePresence Multipoint Switch devices. A remote, unauthenticated attacker could send a malicious request to an affected device to trigger a crash of the call geometry process. The attacker would need the ability to communicate to an affected device on TCP port 9000.

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

  • CTMS - CSCtj44534 ( registered customers only) has been assigned the CVE identifier CVE-2011-0390.
    

Workarounds

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

  Additional mitigations that can be deployed on Cisco devices within 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 of 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 Java Servlet Access	CSCtf01253	CTMS	1.7.0	1.7.1
  	CSCtf42008	CTMS	1.7.0	1.7.1
  Unauthenticated Arbitrary File Upload	CSCth61065	CTMS	1.7.0	1.7.1
  Cisco Discovery Protocol Remote Code Execution	CSCtd75766	CTMS	1.7.0	1.7.1
  Unauthorized Servlet Access	CSCtf97164	CTMS	1.7.0	1.7.1
  Java RMI JBOSS Denial of Service	CSCtg35825	CTMS	1.7.0	1.7.1
  Real-Time Transport Control Protocol Denial of Service	CSCth60993	CTMS	1.7.0	1.7.1
  XML-RPC Denial of Service	CSCtj44534	CTMS	1.7.2 – Estimated Availability is End of March 2011	1.7.2 – Estimated Availability is End of March 2011

  It is recommended that all components of the Cisco TelePresence solution be upgraded to 1.7.1 or greater.

Exploitation and Public Announcements

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

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

URL

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

Revision History

• Revision 1.1	2011-March-9	Advisory updated to provide new information regarding CSCtj44534 (CVE-2011-0390) and to provide estimated availability for software that will resolve this issue.
  Revision 1.0	2011-February-23	Initial public release.

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