Operating System:

[Cisco]

Published:

24 January 2020

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.0244
      Cisco IOS XE SD-WAN Software Default Credentials Vulnerability
                              24 January 2020

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

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

Product:           Cisco IOS XE SD-WAN
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Administrator Compromise -- Console/Physical
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-1950  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sd-wan-cred-EVGSF259

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

Cisco IOS XE SD-WAN Software Default Credentials Vulnerability

Priority:        High

Advisory ID:     cisco-sa-sd-wan-cred-EVGSF259

First Published: 2020 January 22 16:00 GMT

Version 1.0:     Final

Workarounds:     YesCisco Bug IDs:   CSCvk59282

CVE-2019-1950    

CWE-255

CVSS Score:
8.4  AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X

Summary

  o [CVE-2019-1950_su]

    A vulnerability in Cisco IOS XE SD-WAN Software could allow an
    unauthenticated, local attacker to gain unauthorized access to an affected
    device.

    The vulnerability is due to the existence of default credentials within the
    default configuration of an affected device. An attacker who has access to
    an affected device could log in with elevated privileges. A successful
    exploit could allow the attacker to take complete control of the device.

    Cisco has released software updates that address this vulnerability. There
    are workarounds that address this vulnerability.

    This advisory is available at the following link:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
    cisco-sa-sd-wan-cred-EVGSF259

    [/CVE-2019-1950_su]

Affected Products

  o [CVE-2019-1950_ap]

    [/CVE-2019-1950_ap]

    Vulnerable Products

    [CVE-2019-1950_vp]

    This vulnerability affects Cisco devices that are running Cisco IOS XE
    SD-WAN Software releases 16.11 and earlier.

    [/CVE-2019-1950_vp]

    Products Confirmed Not Vulnerable

    [CVE-2019-1950_nv]

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

    [/CVE-2019-1950_nv]

Workarounds

  o [CVE-2019-1950_wa]

    To check for the presence of default credentials, customers can use the
    show running-configuration | include username admin command within the
    Cisco IOS XE SD-WAN Software command line.

    To remove the default credentials, customers can use the config-transaction
    and no username admin commands.

    [/CVE-2019-1950_wa]

Fixed Software

  o [CVE-2019-1950_fs]

    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.

    [/CVE-2019-1950_fs]

    [CVE-2019-1950_fr]

    Fixed Releases

    Cisco fixed this vulnerability in Cisco IOS XE SD-WAN Software Release
    16.12.1.

    [/CVE-2019-1950_fr]

Exploitation and Public Announcements

  o [CVE-2019-1950_ex]

    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.

    [/CVE-2019-1950_ex]

Source

  o [CVE-2019-1950_vs]

    This vulnerability was found during internal security testing.

    [/CVE-2019-1950_vs]

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-sd-wan-cred-EVGSF259

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    +----------+---------------------------+----------+--------+--------------+
    | 1.0      | Initial public release.   | -        | Final  | 2020-JAN-22  |
    +----------+---------------------------+----------+--------+--------------+

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