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Multiple Vulnerabilities in Cisco TelePresence Recording Server

Advisory ID: cisco-sa-20110223-telepresence-ctrs

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110223-telepresence-ctrs

Revision 1.0

For Public Release 2011 Februrary 23 16:00  UTC (GMT)


Summary

Multiple vulnerabilities exist within the Cisco TelePresence Recording Server. This security advisory outlines details of the following vulnerabilities:

  • Unauthenticated Java Servlet Access
  • Common Gateway Interface (CGI) Command Injection
  • Unauthenticated Arbitrary File Upload
  • XML-Remote Procedure Call (RPC) Arbitrary File Overwrite
  • Cisco Discovery Protocol Remote Code Execution
  • Ad Hoc Recording Denial of Service
  • Java Remote method Invocation (RMI) Denial of Service
  • Unauthenticated XML-RPC Interface

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 that is 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 that is 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 endpoints, 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

The Java RMI Denial of Service vulnerability affects the Cisco TelePresence 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 Multipoint Switch - CSCtg35825
  • Cisco TelePresence Recording Server - CSCtg35830

This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110223-telepresence-ctrs.

Affected Products

These vulnerabilities affect the Cisco TelePresence Recording Server. All releases of Cisco TelePresence software prior to 1.7.1 are affected by one or more of the vulnerabilities listed in this advisory.

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

Description

Cisco Bug ID

Affected Software Releases

Unauthenticated Java Servlet Access

CSCtf42005

1.6.x

CGI Command Injection

CSCtf97221

1.6.x

Unauthenticated Arbitrary File Upload

CSCth85786

1.6.x

XML-RPC Arbitrary File Overwrite

CSCti50739

1.6.x, 1.7.0

Cisco Discovery Protocol Remote Code Execution

CSCtd75769

1.6.x

Ad Hoc Recording Denial of Service

CSCtf97205

1.6.x

Java RMI Denial of Service

CSCtg35830

1.6.x

Unauthenticated XML-RPC Interface

CSCtg35833

1.6.x

Vulnerable Products

Cisco TelePresence Recording Server devices that are running an affected version of software are affected.

To determine the current version of software that is running on the Cisco TelePresence Recording Server, access the device via SSH 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: 1.7.0.0-151

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

admin: show version inactive
Inactive Master Version: 1.6.2.0-237

Inactive Version Installed Software Options: 

No Installed Software Options Found.

In the preceding example, the system has versions 1.6.2 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 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 the Cisco TelePresence Recording Server. These vulnerabilities are independent of each other.

Unauthenticated Java Servlet Access

A number of sensitive Java Servlets delivered via a Java Servlet framework within the Cisco TelePresence Recording Server could allow a remote, unauthenticated attacker to perform actions that should be restricted to administrative users. To successfully exploit this vulnerability, the attacker would need the ability to submit a crafted request to an affected device on TCP port 80, TCP port 443, or TCP port 8080.

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

  • Cisco TelePresence Recording Server - CSCtf42005 ( registered customers only) has been assigned the CVE identifier CVE-2011-0383.

CGI Command Injection

A CGI command injection vulnerability exists within the Cisco TelePresence Recording Server that could allow a remote, unauthenticated attacker to execute arbitrary commands with elevated privileges. To successfully exploit this vulnerability the attacker would need the ability to 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 Recording Server - CSCtf97221 ( registered customers only) has been assigned the CVE identifier CVE-2011-0382.

Unauthenticated Arbitrary File Upload

An arbitrary file upload vulnerability exists within the administrative web interface of the Cisco TelePresence Recording Server. An unauthenticated, remote attacker could place content to arbitrary locations on the device by submitting crafted requests to the affected device. To successfully exploit this vulnerability 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.

  • Cisco TelePresence Recording Server - CSCth85786 ( registered customers only) has been assigned the CVE identifier CVE-2011-0385.

XML-RPC Arbitrary File Overwrite

An arbitrary file overwrite vulnerability exists within Cisco TelePresence Recording Server devices that could allow an unauthenticated, remote attacker to overwrite arbitrary files with logging data. This vulnerability could be leveraged to obtain full control of the affected device. To successfully exploit this vulnerability the attacker would need the ability to submit a malformed request to an affected device via TCP port 12102 or 12104.

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

  • Cisco TelePresence Recording Server - CSCti50739 ( registered customers only) has been assigned the CVE identifier CVE-2011-0386.

Cisco Discovery Protocol Remote Code Execution

A remote code execution vulnerability exists within Cisco TelePresence Recording Server 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 the affected system.

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.

  • Cisco TelePresence Recording Server - CSCtd75769 ( registered customers only) has been assigned the CVE identifier CVE-2011-0379.

Ad Hoc Recording Denial of Service

A denial of service vulnerability exists within Cisco TelePresence Recording Server devices. The vulnerability could allow an unauthenticated, remote attacker to cause all recording and playback threads on the device to be consumed. A restart of the affected device may be required to regain functionality. To successfully exploit this vulnerability the attacker would need the ability to submit a malformed request to an affected device via TCP port 80.

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

  • Cisco TelePresence Recording Server - CSCtf97205 ( registered customers only) has been assigned the CVE identifier CVE-2011-0391.

Java RMI Denial of Service

A denial of service vulnerability exists within Cisco TelePresence Recording Server 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. To successfully exploit this vulnerability 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.

  • Cisco TelePresence Recording Server - CSCtg35830 ( registered customers only) has been assigned the CVE identifier CVE-2011-0388.

Unauthenticated XML-RPC Interface

An unauthenticated XML-RPC interface exists within Cisco TelePresence Recording Server devices. This vulnerability could allow an unauthenticated, remote attacker to perform a limited number of actions on the system that should be restricted to authorized users. To successfully exploit this vulnerability the attacker would need the ability to communicate to an affected device on TCP port 8080.

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

  • Cisco TelePresence Recording Server - CSCtg35833 ( registered customers only) has been assigned the CVE identifier CVE-2011-0392.

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 Cisco 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.

CSCtf42005 - Unauthenticated Java Servlet Access

Calculate the environmental score of CSCtf42005

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

CSCtf97221 - CGI Command Injection

Calculate the environmental score of CSCtf97221

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

CSCth85786 - Unauthenticated Arbitrary File Upload

Calculate the environmental score of CSCth85786

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

CSCti50739 - XML-RPC Arbitrary File Overwrite

Calculate the environmental score of CSCti50739

CVSS Base Score - 9.3

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Medium

None

Complete

Complete

Complete

CVSS Temporal Score - 7.7

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

CSCtd75769 - Cisco Discovery Protocol Remote Code Execution

Calculate the environmental score of CSCtd75769

CVSS Base Score - 7.9

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Adjacent Network

Medium

None

Complete

Complete

Complete

CVSS Temporal Score - 6.5

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed

CSCtf97205 - Ad Hoc Recording Denial of Service

Calculate the environmental score of CSCtf97205

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

CSCtg35830 - Java RMI Denial of Service

Calculate the environmental score of CSCtg35830

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

CSCtg35833 - Unauthenticated XML-RPC Interface

Calculate the environmental score of CSCtg35833

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

Impact

Successful exploitation of the Unauthenticated Java Servlet Access (CSCtf42005) vulnerability could allow an unauthenticated, remote attacker to take complete control of the affected device or system.

Successful exploitation of the CGI Command Injection (CSCtf97221) vulnerability could allow an unauthenticated, remote attacker to take complete control of the affected device or system.

Successful exploitation of the Unauthenticated Arbitrary File Upload (CSCth85786) vulnerability could allow an unauthenticated, remote attacker to place or overwrite arbitrary files on the affected system. This may allow the attacker to gain full control of the affected device.

Successful exploitation of the XML-RPC Arbitrary File Overwrite (CSCti50739) vulnerability could allow an unauthenticated, remote attacker to create a denial of service condition. In some instances this issue could be leveraged to gain complete control of the affected system.

Successful exploitation of the Cisco Discovery Protocol Remote Code Execution (CSCtd75769) vulnerability could allow an unauthenticated, adjacent attacker to take complete control of the affected system.

Successful exploitation of the Ad Hoc Recording Denial of Service (CSCtf97205) vulnerability could allow an unauthenticated, remote attacker to cause a persistent denial of service condition on an affected device.

Successful exploitation of the Java RMI Denial of Service (CSCtg35830) vulnerability could allow an unauthenticated, remote attacker to cause all web-based services to become inaccessible.

Successful exploitation of the Unauthenticated XML-RPC Interface (CSCtg35833) vulnerability could allow an unauthenticated, remote attacker to perform a number of actions that should be restricted to authenticated users.

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 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 Java Servlet Access

CSCtf42005

Cisco TelePresence Recording Server

1.6.2

1.7.1

CGI Command Injection

CSCtf97221

Cisco TelePresence Recording Server

1.6.2

1.7.1

Unauthenticated Arbitrary File Upload

CSCth85786

Cisco TelePresence Recording Server

1.7.0

1.7.1

XML-RPC Arbitrary File Overwrite

CSCti50739

Cisco TelePresence Recording Server

1.7.1

1.7.1

Cisco Discovery Protocol Remote Code Execution

CSCtd75769

Cisco TelePresence Recording Server

1.7.0

1.7.1

Ad Hoc Recording Denial of Service

CSCtf97205

Cisco TelePresence Recording Server

1.7.0

1.7.1

Java RMI Denial of Service

CSCtg35830

Cisco TelePresence Recording Server

1.7.0

1.7.1

Unauthenticated XML-RPC Interface

CSCtg35833

Cisco TelePresence Recording Server

1.7.0

1.7.1

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

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: http://tools.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20110223-telepresence

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 vulnerabilities described in this advisory.

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

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-20110223-telepresence-ctrs

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-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
  • 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-February-23

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.