ESB-2018.1818 - [Cisco] NVIDIA TX1: Execute arbitrary code/commands - Console/physical 2018-06-21

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             AUSCERT External Security Bulletin Redistribution

                     NVIDIA TX1 Boot ROM Vulnerability
                               21 June 2018


        AusCERT Security Bulletin Summary

Product:           NVIDIA TX1
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Execute Arbitrary Code/Commands -- Console/Physical
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-6242  

Original Bulletin:

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NVIDIA TX1 Boot ROM Vulnerability


Advisory ID:     cisco-sa-20180620-nvidia-tx1-rom
First Published: 2018 June 20 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvj27020
CVSS Score:
Base 6.8


  * On April 24, 2018, researchers disclosed a vulnerability that takes
    advantage of a buffer overflow vulnerability in NVIDIA TX1 BootROM when
    Recovery Mode (RCM) is active. This vulnerability could allow an
    unprivileged, local attacker to bypass secure boot and execute unverified
    code on an affected system.

    The vulnerability has been identified by CVE-2018-6242.

    To exploit this vulnerability, an attacker must be able to physically
    access the device along with the affected processor?s USB connection. This
    vulnerability cannot be exploited remotely, even if the device is
    connected to the Internet.

    Cisco has identified all products that use the NVIDIA TX1 processor and
    has released software updates to address this vulnerability. The software
    update will permanently disable the ability to activate RCM. Should
    customers attempt to downgrade their software version, the ability to
    activate RCM will no longer be available.

    There are no workarounds that address this vulnerability.

    This advisory is available at the following link:

Affected Products

  * Cisco has investigated its product line to determine which products may be
    affected by this vulnerability.

    Any product not listed in the Vulnerable Products section of this advisory
    is to be considered not vulnerable.

    Vulnerable Products

    The following table lists Cisco products that are affected by the
    vulnerability described in this advisory:

                   Product              Cisco Bug   Fixed Release Availability
         Collaboration Endpoints
         Cisco WebEx Room 55           CSCvj27020  CE9.2.6 (Available)
                                                   CE9.3.2 (Available)
         Cisco WebEx Room 70 Single/   CSCvj27020  CE9.2.6 (Available)
                             Dual                  CE9.3.2 (Available)
         Cisco WebEx Room Kit          CSCvj27020  CE9.2.6 (Available)
                                                   CE9.3.2 (Available)
         Cisco WebEx Room Kit Plus     CSCvj27020  CE9.2.6 (Available)
                                                   CE9.3.2 (Available)
         Cloud-Based Deployments
         RoomOS                        CSCvj27020  RoomOS 2018-06-01

    Note: Collaboration Endpoints are installed on-premises for customer
    deployments. RoomOS is an alternate software offering for the same
    products, but via cloud-based deployments (e.g., Cisco WebEx cloud
    subscriptions). Cisco controls the push of the software to these units,
    which have either already received the patch via software updates, or will
    receive the update the next time the device is powered on and online.

    Products Confirmed Not Vulnerable

    Only products listed in the Vulnerable Products section of this advisory
    are known to be affected by this vulnerability.

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


  * There are no workarounds that address this vulnerability.

Fixed Software

  * For information about fixed software releases, see the Vulnerable Products
    section of this advisory

    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

Exploitation and Public Announcements

  * The vulnerability described in this advisory was discussed in several
    articles and discussion forums as of April 24, 2018.

    The Cisco Product Security Incident Response Team (PSIRT) is not aware of
    any malicious use of the vulnerability that is described in this advisory.

Cisco Security Vulnerability Policy

  * To learn about Cisco security vulnerability disclosure policies and
    publications, see the Security Vulnerability Policy. This document also
    contains instructions for obtaining fixed software and receiving security
    vulnerability information from Cisco.

Subscribe to Cisco Security Notifications

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Revision History

  * +----------------------------------------------------------------------------+
    | Version  |        Description         | Section  | Status  |     Date      |
    | 1.0      | Initial public release.    | -        | Final   | 2018-June-20  |

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