ESB-2018.3001 - [Cisco] Cisco SD-WAN Solution: Unauthorised access - Remote/unauthenticated 2018-10-04

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3001
     Cisco SD-WAN Solution Certificate Validation Bypass Vulnerability
                              4 October 2018

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

Product:           Cisco SD-WAN Solution
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-15387  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-sd-wan-bypass

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Cisco Security Advisory

Cisco SD-WAN Solution Certificate Validation Bypass Vulnerability

Priority:		High
Advisory ID:		cisco-sa-20181003-sd-wan-bypass
First Published:	2018 October 3 16:00 GMT
Version 1.0:		Final
Workarounds:		No workarounds available
Cisco Bug IDs:		CSCvk65292
CVE-2018-15387
CWE-20
CVSS Score:		Base 8.1
CVSS:			3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X

Summary

  * A vulnerability in the Cisco SD-WAN Solution could allow an
    unauthenticated, remote attacker to bypass certificate validation on an
    affected device.

    The vulnerability is due to improper certificate validation. An attacker
    could exploit this vulnerability by supplying a system image signed with a
    crafted certificate to an affected device, bypassing the certificate
    validation. An exploit could allow an attacker to deploy a crafted system
    image.

    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:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-sd-wan-bypass

Affected Products

  * Vulnerable Products

    This vulnerability affects Cisco SD-WAN Solution releases prior to Releases
    17.2.8 and 18.3.1 running on the following Cisco products:

      + 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

    Products Confirmed Not Vulnerable

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

Workarounds

  * There are no workarounds that address this vulnerability.

Fixed Software

  * 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

    This vulnerability is fixed in Cisco SD-WAN Solution Releases 17.2.8 and
    18.3.1.

    The software can be downloaded from the Software Center on Cisco.com by
    clicking Browse all and navigating to the following locations:

    vBond, vEdge Cloud, vEdge 5000, and vSmart

     1. Navigate to Routers > Software-Defined WAN (SD-WAN) > SD-WAN > SD-WAN
        Software Update.
     2. From the left panel, click 18.3.1 under Latest Release.
     3. Choose vSmart, vEdge Cloud and vBond 18.3.1 upgrade image.

    vEdge 100, 1000, and 2000 Series Routers

     1. Navigate to Routers > Software-Defined WAN (SD-WAN) > vEdge Router >
        vEdge Router Model.
     2. From the left panel, click 18.3.1 under Latest Release.
     3. Choose vEdge 18.3.1 Upgrade Image for vEdge 100b, vEdge 100m, vEdge
        1000, vEdge 2000 Routers.

    vManage Network Management Software

     1. Navigate to Routers > Software-Defined WAN (SD-WAN) > SD-WAN > SD-WAN
        Software Update.
     2. From the left panel, click 18.3.1 under Latest Release.
     3. Choose vManage 18.3.1 upgrade image.

    Note: The software for Cisco vEdge 5000 Series Routers can be downloaded
    from the Viptela Customer Support Portal.

Exploitation and Public Announcements

  * 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

  * This vulnerability was reported to Cisco by Joe Ksiazek, a security
    researcher with Exelon.

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.

URL

  * https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-sd-wan-bypass

Revision History

    +-----------------------------------------------------------------------------+
    | Version  |        Description        | Section  | Status |       Date       |
    |----------+---------------------------+----------+--------+------------------|
    | 1.0      | Initial public release.   | ?        | Final  | 2018-October-03  |
    +-----------------------------------------------------------------------------+

Legal Disclaimer

  * THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
    OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
    FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
    OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
    THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

    A standalone copy or paraphrase of the text of this document that omits the
    distribution URL is an uncontrolled copy and may lack important information
    or contain factual errors. The information in this document is intended for
    end users of Cisco products.

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.

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