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             AUSCERT External Security Bulletin Redistribution

       Cisco SD-WAN Solution Software Buffer Overflow Vulnerability
                               31 July 2020


        AusCERT Security Bulletin Summary

Product:           Cisco SD-WAN Solution Software
Publisher:         Cisco Systems
Operating System:  Network Appliance
Impact/Access:     Root Compromise                 -- Remote/Unauthenticated
                   Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Modify Arbitrary Files          -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-3375  

Original Bulletin: 

Comment: Cisco is not aware of active exploitation of this vulnerability.

Revision History:  July 31 2020: Vendor updated fixed software section.
                   July 30 2020: Initial Release

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

Cisco SD-WAN Solution Software Buffer Overflow Vulnerability

Priority:        Critical

Advisory ID:     cisco-sa-sdbufof-h5f5VSeL

First Published: 2020 July 29 16:00 GMT

Last Updated:    2020 July 30 17:13 GMT

Version 1.2:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvt11538



CVSS Score:


  o A vulnerability in Cisco SD-WAN Solution Software could allow an
    unauthenticated, remote attacker to cause a buffer overflow on an affected

    The vulnerability is due to insufficient input validation. An attacker
    could exploit this vulnerability by sending crafted traffic to an affected
    device. A successful exploit could allow the attacker to gain access to
    information that they are not authorized to access, make changes to the
    system that they are not authorized to make, and execute commands on an
    affected system with privileges of the root user.

    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:

Affected Products

  o Vulnerable Products

    This vulnerability affects the following Cisco products if they are running
    a vulnerable release of Cisco SD-WAN Solution Software:

       IOS XE SD-WAN Software
       SD-WAN vBond Orchestrator Software
       SD-WAN vEdge Cloud Routers
       SD-WAN vEdge Routers
       SD-WAN vManage Software
       SD-WAN vSmart Controller Software

    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 this vulnerability.

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

       Adaptive Security Appliance (ASA) Software
       IOS Software
       IOS XE Software
       NX-OS Software


  o There are no workarounds that address this vulnerability.

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/

    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

    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

    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

    Fixed Releases

    Customers are advised to upgrade to an appropriate fixed software release
    as indicated in the following table(s):

    SD-WAN vManage Software

    Cisco SD-WAN vManage Software Release        First Fixed Release
    18.3.0                                       Migrate to a fixed release.
    18.4.0                                       18.4.5
    19.2.0                                       19.2.3
    19.3.0                                       Migrate to a fixed release.
    20.1.0                                       20.1.1

    SD-WAN vEdge, vBond, and vSmart Software

    Cisco SD-WAN vEdge, vBond, and vSmart        First Fixed Release
    Software Releases
    18.3.0                                       Migrate to a fixed release.
    18.4.0                                       18.4.5
    19.2.0                                       19.2.3
    19.3.0                                       Migrate to a fixed release.
    20.1.0                                       20.1.1

    IOS XE SD-WAN Software

    Cisco IOS XE SD-WAN Software Release         First Fixed Release
    16.9                                         Migrate to a fixed release.
    16.10                                        Migrate to a fixed release.
    16.11                                        Migrate to a fixed release.
    16.12                                        16.12.4
    17.2                                         17.2.1r

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 vulnerability that is
    described in this advisory.


  o This vulnerability was found during internal security testing by James
    Spadaro of the Cisco Advanced Security Initiatives Group (ASIG).

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.


  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/

Revision History

  o +---------+--------------------------+-------------+--------+-------------+
    | Version |       Description        |   Section   | Status |    Date     |
    | 1.0     | Initial public release.  | -           | Final  | 2020-JUL-29 |
    | 1.2     | Updated Fixed Software   | Fixed       | Final  | 2020-JUL-29 |
    |         | section.                 | Software    |        |             |
    | 1.1     | Updated source           | -           | Final  | 2020-JUL-29 |
    |         | information.             |             |        |             |

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