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Security Alert – CISCO WARNS OF CRITICAL FLAW IN VOICE OS-BASED PRODUCTS

Cisco Systems issued a security advisory warning customers key products tied to its Cisco Voice Operating System software platform were vulnerable to an attack where an unauthenticated, remote hacker could gain unauthorized and elevated access to impacted devices.

The Cisco Security Bulletin is rated Critical and was issued Wednesday. It is tied to a vulnerability (CVE-2017-12337) in its Voice Operating System software which is used in flagship products such as its Cisco Unified Communications Manager, which brings together voice, video, telepresence, messaging and presence. Cisco Unified Communications Manager was previously known as CallManager.
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Summary
  • A vulnerability in the upgrade mechanism of Cisco collaboration products based on the Cisco Voice Operating System software platform could allow an unauthenticated, remote attacker to gain unauthorized, elevated access to an affected device.

    The vulnerability occurs when a refresh upgrade or Prime Collaboration Deployment (PCD) migration is performed on an affected device. When a refresh upgrade or PCD migration is completed successfully, an engineering flag remains enabled and could allow root access to the device with a known password.

    If the vulnerable device is subsequently upgraded using the standard upgrade method to an Engineering Special Release, service update, or a new major release of the affected product, this vulnerability is remediated by that action.

    Note: Engineering Special Releases that are installed as COP files, as opposed to the standard upgrade method, do not remediate this vulnerability.

    An attacker who can access an affected device over SFTP while it is in a vulnerable state could gain root access to the device. This access could allow the attacker to compromise the affected system completely.

    Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

    This advisory is available at the following link:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-vos

Affected Products
  • Vulnerable Products

    This vulnerability affects the following Cisco Voice Operating System (VOS)–based products when they have been upgraded by using the refresh upgrade (RU) method or migrated by using the Prime Collaboration Deployment (PCD) method:

    • Cisco Unified Communications Manager (UCM)
    • Cisco Unified Communication Manager Session Management Edition (SME)
    • Cisco Emergency Responder
    • Cisco Unity Connection
    • Cisco Unified Communications Manager IM and Presence Service (IM&P; earlier releases were known as Cisco Unified Presence)
    • Cisco Prime License Manager
    • Cisco Hosted Collaboration Mediation Fulfillment
    • Cisco Unified Contact Center Express (UCCx)
    • Cisco SocialMiner
    • Cisco Unified Intelligence Center (UIC)
    • Cisco Finesse
    • Cisco MediaSense

    The PCD migration method affects only Cisco UCM, SME, and IM&P.

    Determining the Upgrade or Migration Method

    The Cisco VOS-based products identified in the preceding vulnerable products list are affected by this vulnerability if they were refresh upgraded or migrated by using the PCD methods. Note that a VOS-based product must go through a refresh upgrade if the underlying operating system is also being upgraded to a new major release.

    If the VOS-based product was standard upgraded to an Engineering Special, service update, or a new major release of the affected product that does not require major upgrades to the underlying operating system, this vulnerability will be remediated by that standard upgrade action.

    Refresh Upgrade Method Verification

    To verify whether the product has been exposed to the vulnerability by the refresh upgrade method, issue the following command at the CLI to view the system-history.log file:

    admin: file view install system-history.log

    The following example shows a refresh upgrade entry in the system-history.log file:

    02/28/2013 14:56:05 | root: Upgrade (refresh) 10.0.0.97016-27 Success

    The following example shows a standard upgrade entry in the system-history.log file:

    10/13/2017 18:56:07 | root: Upgrade 12.0.1.20000-3 Success

    PCD Migration Method Verification

    To verify whether the product has been exposed to this vulnerability by the PCD migration method, issue the following command at the CLI to view the install.log file:

    admin: file view install install.log

    The following example shows a PCD migration log entry in the install.log file:

    10/16/2017 13:59:13 post_install|Starting post_install processing - VOS_INSTALL_CONTEXT = M1|

    The following example shows a normal fresh install log entry in the install.log file:

    08/15/2011 08:56:03 post_install|Starting post_install processing - VOS_INSTALL_CONTEXT = install|

    Underlying Operating System Upgraded to a New Major Release

    A VOS-based product will undergo a refresh upgrade if the underlying operating system is also upgraded to a new major release.

    The following examples show major operating system releases that are associated with major affected product releases:

    Cisco UCM, Cisco Unity Connection, and Cisco Unified Presence Server/Cisco IM&P Major Release Operating System Major Release
    8.6 RHEL 5 Update 5
    9.x RHEL 5 Update 7
    10.x RHEL 6 Update 2
    11.x RHEL 6 Update 5
    12.x CentOS 6 Update 6

    Because an upgrade from RHEL 6 to CentOS 6 is not considered a major operating system release change, product updates between these operating system releases will use the standard upgrade method.

    Prime Collaboration Deployment Cluster Migration

    Prime Collaboration Deployment is a free application that is designed to assist in the management of various Cisco Unified Communications applications. The PCD migrate cluster task is supported only for the following Cisco products and to only certain cluster migration destination versions.

    • UCM destination version 10.x, 11.0(1), 11.5(x), 12.0(1)
    • IM&P destination version 10.x, 11.0(1), 11.5(x), 12.0(1)

    Refer to the product documentation for information about specific upgrade and migration methods.

    Determining the Current Software Release for the Cisco Unified Platform

    The following Cisco products run on the Cisco Unified platform:

    • Unified Communications Manager
    • Unified Communications Manager Session Management Edition
    • Emergency Responder
    • Unity Connection
    • Unified Communications Manager IM and Presence Service
    • Prime License Manager
    • Hosted Collaboration Mediation Fulfillment

    To determine which Cisco VOS-based product software release is running on the Cisco Unified platform, an administrator can issue the show version active command at the CLI.

    In the following example, the software release is 11.5.1.10000-86.

    ciscocm: show version active
    Active Master Version: 11.5.1.10000-86

    An administrator can use the user interface to determine which Cisco VOS-based product software release is running:

    1. Log in to the web-based interface
    2. Click the Help menu
    3. Click About to view the system software release

    Determining the Current Software Release for the Cisco Contact Center Platform

    The following Cisco products run on the Cisco Contact Center platform:

    • Unified Contact Center Express
    • SocialMiner
    • Unified Intelligence Center
    • Finesse
    • MediaSense

    To determine which Cisco VOS-based product software release is running on the Contact Center platform, an administrator can issue the show version active command at the CLI.

    In the following example, the software release is 11.5.1.10000-86.

    admin: show version active
    Active Master Version: 11.5.1.10000-86

    An administrator can use the user interface to determine which Cisco Contact Center platform–based product software release is running:

    1. Log in to the Contact Center Express server
    2. Go to the Cisco Unified Communications operating system administration window
    3. Choose Show > Software

    Products Confirmed Not Vulnerable

    No other Cisco products are currently known to be affected by this vulnerability.

    Cisco has confirmed that this vulnerability does not affect the following products:

    • Cisco Identity Service (IdS) 11.5 and 11.6
    • Cisco Prime Collaboration Deployment
    • Cisco Prime Collaboration Provisioning
    • Cisco Prime Collaboration Assurance
    • Cisco Virtualized Voice Browser

Workarounds
  • There are no workarounds that address this vulnerability.
Fixed Software
  • Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:
    http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html

    Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.

    When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, 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.

    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 TAC:
    http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html

    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.

    Fixed Releases and Software Downloads

    Cisco Unified Communications Manager – Cisco Bug ID CSCvg22923

    Cisco Unified Communications Manager software can be downloaded from the Software Center on Cisco.com by navigating to Products > Unified Communications > Call Control > Unified Communications Manager (CallManager).

    Cisco Unified Communications Manager Major Release Remediation Solutions for This Advisory
    8.6 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.1 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update
    10.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    10.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    12.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn

    Cisco Unified Communications Manager Session Management Edition – Cisco Bug ID CSCvg22923

    Cisco Unified Communications Manager Session Management Edition (SME) software can be downloaded from the Software Center on Cisco.com by navigating to Products > Unified Communications > Call Control > Unified Communications Manager Session Management Edition > Unified Communications Manager / Cisco Unity Connection Utilities.

    Cisco Unified Communications Manager SME Major Release Remediation Solutions for This Advisory
    8.6 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.1 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    10.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    10.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    12.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.0.k3.cop.sgn

    Cisco Emergency Responder – Cisco Bug ID CSCvg55112

    Cisco Emergency Responder software can be downloaded from the Software Center on Cisco.com by navigating to Products > Unified Communications > Telephony Extensions > Emergency Responder.

    Cisco Emergency Responder Major Release Remediation Solutions for This Advisory
    8.6 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    8.7 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    10.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    10.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    12.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn.

    Cisco Unity Connection – Cisco Bug ID CSCvg55128

    Cisco Unity Connection software can be downloaded from the Software Center on Cisco.com by navigating to Products > Unified Communications > Unified Communications Applications > Messaging > Unity Connection.

    Cisco Unity Connection Major Release Remediation Solutions for This Advisory
    8.6 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.1 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    10.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    10.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    12.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.

    Cisco Unified Communications Manager IM and Presence Service – Cisco Bug ID CSCvg22923

    Cisco Unified Communications Manager IM and Presence Service software can be downloaded from the Software Center on Cisco.com by navigating to Products > Unified Communications > Unified Communications Applications > Presence Software > Unified Communications Manager IM & Presence Service.

    Cisco Unified IM and Presence Service Major Release Remediation Solutions for This Advisory
    8.6 (Unified Presence) Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.1 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    10.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    10.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    12.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.

    Cisco Prime License Manager – Cisco Bug ID CSCvg58619

    Cisco Prime License Manager software can be downloaded from the Software Center on Cisco.com by navigating to Products > Unified Communications > Unified Communications Management > Prime License Manager > Prime License Manager Software Updates.

    Cisco Prime License Manager Major Release Remediation Solutions for This Advisory
    9.0 (Enterprise License Manager) Not vulnerable
    10.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    10.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.0 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.

    Cisco Hosted Collaboration Mediation Fulfillment – Cisco Bug ID CSCvg68797

    Cisco Hosted Collaboration Mediation Fulfillment software can be downloaded from the Software Center on Cisco.com by navigating to Products > Unified Communications > Call Control > Hosted Collaboration > Hosted Collaboration Solution (HCS).

    Cisco Hosted Collaboration Solution Major Release Remediation Solutions for This Advisory
    9.2 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.2(1) Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    9.2(1)SU1 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.cop.sgn or perform a service update.
    10.0(1) Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    10.1(1) Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    10.1(2) Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    10.6(1) Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ciscocm.CSCvg22923-v1.2.k3.cop.sgn

    Cisco Unified Contact Center Express – Cisco Bug ID CSCvg55145

    Cisco Unified Contact Center Express software can be downloaded from the Software Center on Cisco.com by navigating to Products > Customer Collaboration > Contact Center Solutions > Unified Contact Center Express.

    Cisco Unified Contact Center Express Major Release Remediation Solutions for This Advisory
    8.5(1) Not vulnerable
    9.0(1) Not vulnerable
    9.0(2) Not vulnerable
    10.0(1) Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    10.5(1) Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    10.6(1) Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    11.0(1) Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    11.5(1) Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    11.6(1) Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn

    Cisco SocialMiner – Cisco Bug ID CSCvg64453

    Cisco SocialMiner software can be downloaded from the Software Center on Cisco.com by navigating to Products > Customer Collaboration > Options for Contact Center Solutions > SocialMiner > SocialMiner Software.

    Cisco SocialMiner Major Release Remediation Solutions for This Advisory
    8.5 Not vulnerable
    9.0 Not vulnerable
    10.0 Not vulnerable
    10.5 Not vulnerable
    10.6 Vulnerable; apply COP file ciscosm-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    11.0 Vulnerable; apply COP file ciscosm-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn

    Cisco Unified Intelligence Center and Cisco Unified Intelligence Center with Live Data – Cisco Bug ID CSCvg64464

    Cisco Unified Intelligence Center software can be downloaded from the Software Center on Cisco.com by navigating to Products > Customer Collaboration > Options for Contact Center Solutions > Unified Intelligence Center > Unified Intelligence Center Software.

    Cisco Unified Intelligence Center Major Release Remediation Solutions for This Advisory
    8.5 Not vulnerable
    9.0 Not vulnerable
    9.1 Not vulnerable
    10.0 Not vulnerable
    10.5 Not vulnerable
    11.0 Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    11.6 Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn

    Cisco Finesse – Cisco Bug ID CSCvg64475

    Cisco Finesse software can be downloaded from the Software Center on Cisco.com by navigating to Products > Customer Collaboration > Options for Contact Center Solutions > Finesse > Finesse Software.

    Cisco Finesse Major Release Remediation Solutions for This Advisory
    8.5 Not vulnerable
    9.0 Not vulnerable
    10.0 Not vulnerable
    10.5 Not vulnerable
    11.0 Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    11.6 Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn

    Cisco MediaSense – Cisco Bug ID CSCvg64456

    Cisco MediaSense software can be downloaded from the Software Center on Cisco.com by navigating to Products > Customer Collaboration > Options for Contact Center Solutions > MediaSense > MediaSense Software.

    Cisco MediaSense Major Release Remediation Solutions for This Advisory
    8.5 Not vulnerable
    9.0 Not vulnerable
    10.0 Not vulnerable
    10.5 Not vulnerable
    11.0 Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn or perform a service update.
    11.5 Vulnerable; apply COP file ucos-psirt-root-access-CSCvg55145-k3-1.1.cop.sgn
Exploitation and Public Announcements
  • The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Source
  • Cisco would like to thank Quentin Rhoads-Herrera and Rich Mirch of the State Farm Penetration Testing Team for reporting this vulnerability.
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Stephen

Stephen Turner, the Director of Operations for predictiveIT, has spent the past 22 years involved in the technology realm and security. Stephen began his career in the United States Marine Corps as a Crypto Technician, before moving into the private sector. He has worked all facets of the Information Technology world including administration, security, consulting, project management, Director of Cyber Security and as a Chief Information Officer for nationwide organization where he was responsible for architecting the security infrastructure during the migration of the organization’s entire data center to the “cloud”. Stephen has trained as a Certified Ethical Hacker, Certified Information Systems Security Professional and as a Red Hat Certified Architect with a focus on Linux security.
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