Operating System:

[Cisco]

Published:

19 November 2020

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.4105
        Cisco Integrated Management Controller Multiple Remote Code
                         Execution Vulnerabilities
                             19 November 2020

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco Integrated Management Controller (IMC)
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Root Compromise                 -- Remote/Unauthenticated
                   Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-3470  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-api-rce-UXwpeDHd

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Integrated Management Controller Multiple Remote Code Execution
Vulnerabilities

Priority:        Critical
Advisory ID:     cisco-sa-ucs-api-rce-UXwpeDHd
First Published: 2020 November 18 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvu21215 CSCvu21222 CSCvu22429 CSCvu80203
CVE Names:       CVE-2020-3470
CWEs:            CWE-119

Summary

  o Multiple vulnerabilities in the API subsystem of Cisco Integrated
    Management Controller (IMC) could allow an unauthenticated, remote attacker
    to execute arbitrary code with root privileges.

    The vulnerabilities are due to improper boundary checks for certain
    user-supplied input. An attacker could exploit these vulnerabilities by
    sending a crafted HTTP request to the API subsystem of an affected system.
    When this request is processed, an exploitable buffer overflow condition
    may occur. A successful exploit could allow the attacker to execute
    arbitrary code with root privileges on the underlying operating system
    (OS).

    Cisco has released software updates that address these vulnerabilities.
    There are no workarounds that address these vulnerabilities.

    This advisory is available at the following link:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
    cisco-sa-ucs-api-rce-UXwpeDHd

Affected Products

  o Vulnerable Products

    These vulnerabilities affect the following Cisco products if they are
    running a vulnerable release of Cisco IMC:

       5000 Series Enterprise Network Compute System (ENCS) Platforms
       UCS C-Series Rack Servers in standalone mode
       UCS E-Series Servers
       UCS S-Series Servers in standalone mode

    For information about which Cisco software releases are vulnerable, see the
    Fixed Software section of this advisory.

    Products Confirmed Not Vulnerable

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

    Cisco has confirmed that these vulnerabilities do not affect Cisco UCS
    B-Series Servers, or Cisco FI-Attached C-Series and S-Series Servers
    managed by Cisco UCS Manager.

Workarounds

  o There are no workarounds to address this vulnerability.

    However, administrators can disable the Cisco IMC web-management interface
    to mitigate the impact of these vulnerabilities. For example, the following
    commands show how to perform the configuration change on a UCS C-Series
    Server:

        xxxxxx-bmc# scope http
        xxxxxx-bmc /http #
        xxxxxx-bmc /http # set enabled no
        SSH is in enabled state. Disabling HTTP service
        Warning: setting "enabled" to "no" will disconnect all
         existing http connections and will disable login via WebUI.
        xxxxxx-bmc /http *# commit
        xxxxxx-bmc /http # show detail
        HTTP Settings:
            HTTP Port: 80
            HTTPS Port: 443
            Timeout: 1800
            Max Sessions: 4
            Active Sessions: 0
            Enabled: no
            HTTP Redirected: yes
        xxxxxx-bmc /http # exit

Fixed Software

  o 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: https://www.cisco.com/c/en/us/products/
    end-user-license-agreement.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: https://www.cisco.com/c
    /en/us/support/web/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

    Customers are advised to upgrade to an appropriate release as indicated in
    the following tables:

    Cisco UCS C-Series Rack Servers

    M3 Servers   Affected Firmware Release     First Fixed Firmware Release
    3.0          3.0(1c) to 3.0(4q)            3.0(4r)

    M4 Servers   Affected Firmware Release     First Fixed Firmware Release
    3.0          3.0(1c) to 3.0(4q)            3.0(4r)
    4.0          4.0(1a) to 4.0(2l)            4.0(2n)
    4.1          4.1(1c) to 4.1(1f)            4.1(1g)

    M5 Servers   Affected Firmware Release     First Fixed Firmware Release
    3.1          All releases                  Migrate to a fixed release.
    4.0          4.0(1a) to 4.0(4l)            4.0(4m)
    4.1          4.1(1c) to 4.1(1f)            4.1(1g)

    Cisco UCS E-Series

    Cisco fixed these vulnerabilities in Cisco IMC for E-Series Servers
    releases 3.2.11.3 and later.

    Cisco UCS S-Series

    Server - S3160  Affected Firmware Release   First Fixed Firmware Release
    3.0             3.0(1c) to 3.0(4q)          3.0(4r)

    Server - S3260  Affected Firmware Release   First Fixed Firmware Release
    3.1             All releases                Migrate to a fixed release.
    4.0             4.0(1a) to 4.0(4l)          4.0(4m)
    4.1             4.1(1c) to 4.1(1f)          4.1(1g)

    Cisco 5000 Series ENCS Platforms

    Cisco fixed these vulnerabilities in Cisco Enterprise NFV Infrastructure
    Software (NFVIS) for Cisco 5000 Series ENCS Platforms releases 4.4.1 and
    later.

Exploitation and Public Announcements

  o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
    any public announcements or malicious use of the vulnerabilities that are
    described in this advisory.

Source

  o Cisco would like to thank Nikita Abramov of Positive Technologies for
    reporting these vulnerabilities.

Cisco Security Vulnerability Policy

  o 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.

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
    cisco-sa-ucs-api-rce-UXwpeDHd

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    +----------+---------------------------+----------+--------+--------------+
    | 1.0      | Initial public release.   | -        | Final  | 2020-NOV-18  |
    +----------+---------------------------+----------+--------+--------------+

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