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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.2991
        Cisco SD-WAN Solution Packet Filtering Bypass Vulnerability
                               8 August 2019

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

Product:           Cisco SD-WAN
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-1951  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-sd-wan-bypass

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

Cisco SD-WAN Solution Packet Filtering Bypass Vulnerability

Priority:        Medium

Advisory ID:     cisco-sa-20190807-sd-wan-bypass

First Published: 2019 August 7 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvn67202

CVE-2019-1951    

CWE-20

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

Summary

  o A vulnerability in the packet filtering features of Cisco SD-WAN Solution
    could allow an unauthenticated, remote attacker to bypass L3 and L4 traffic
    filters.

    The vulnerability is due to improper traffic filtering conditions on an
    affected device. An attacker could exploit this vulnerability by crafting a
    malicious TCP packet with specific characteristics and sending it to a
    target device. A successful exploit could allow the attacker to bypass the
    L3 and L4 traffic filters and inject an arbitrary packet in the network.

    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-20190807-sd-wan-bypass

Affected Products

  o Vulnerable Products

    At the time of publication, this vulnerability affected the following Cisco
    products if they are running Cisco SD-WAN Solution Release 19.1.0 or
    earlier:

       vBond Orchestrator Software
       vEdge 100 Series Routers
       vEdge 1000 Series Routers
       vEdge 2000 Series Routers
       vEdge 5000 Series Routers
       vEdge Cloud Router Platform
       vManage Network Management Software
       vSmart Controller Software

    See the Details section in the bug ID(s) at the top of this advisory for
    the most complete and current information.

    Products Confirmed Not Vulnerable

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

Workarounds

  o There are no workarounds that address this vulnerability.

Fixed Software

  o 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.

    Fixed Releases

    See the Details section in the bug ID(s) at the top of this advisory for
    the most complete and current information.

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.

Source

  o This vulnerability was found during internal security testing.

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-20190807-sd-wan-bypass

Revision History

  o +---------+--------------------------+---------+--------+-----------------+
    | Version |       Description        | Section | Status |      Date       |
    +---------+--------------------------+---------+--------+-----------------+
    | 1.0     | Initial public release.  | -       | Final  | 2019-August-07  |
    +---------+--------------------------+---------+--------+-----------------+

- --------------------------END INCLUDED TEXT--------------------

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