ESB-2019.0212 - [Cisco] Cisco SD-WAN: Multiple vulnerabilities 2019-01-24

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0212
                 Multiple Vulnerabilities in Cisco SD-WAN
                              24 January 2019

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

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

Product:           Cisco SD-WAN
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Root Compromise                 -- Existing Account
                   Execute Arbitrary Code/Commands -- Existing Account
                   Modify Arbitrary Files          -- Existing Account
                   Denial of Service               -- Existing Account
                   Unauthorised Access             -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-1651 CVE-2019-1650 CVE-2019-1648
                   CVE-2019-1647 CVE-2019-1646 

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-sol-escal
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-file-write
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-escal
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-unaccess
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-bo

Comment: This bulletin contains five (5) advisories.

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

Multiple Privilege Escalation Vulnerabilities in Cisco SD-WAN Solution

Priority:        High

Advisory ID:     cisco-sa-20190123-sdwan-escal

First Published: 2019 January 23 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvm25992
                 CSCvm26016
                 CSCvm26025
                 CSCvm26033
                 CSCvm26036

CVE-2019-1646    

CWE-264

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

Summary

  o Multiple vulnerabilities in the local CLI of the Cisco SD-WAN Solution
    could allow an authenticated, local attacker to escalate privileges and
    modify device configuration files.

    The vulnerabilities exist because user input is not properly sanitized for
    certain commands at the CLI. An attacker could exploit these
    vulnerabilities by sending crafted commands to the CLI of an affected
    device. A successful exploit could allow the attacker to establish an
    interactive session with elevated privileges. The attacker could then use
    the elevated privileges to further compromise the device or obtain
    additional configuration data from the device.

    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-20190123-sdwan-escal

Affected Products

  o Vulnerable Products

    These vulnerabilities affect the following Cisco products if they are
    running a release of the Cisco SD-WAN Solution prior to Release 18.4.0:

       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 these vulnerabilities.

Workarounds

  o There are no workarounds that address these vulnerabilities.

Fixed Software

  o Cisco has released free software updates that address the vulnerabilities
    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

    Cisco fixed these vulnerabilities in Cisco SD-WAN Solution Release 18.4.0.

    Customers can download the Cisco SD-WAN Solution 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 pane, click 18.4.0 under Latest Release.
     3. Choose vSmart, vEdge Cloud, vEdge 5000 and vBond 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 pane, click 18.4.0 under Latest Release.
     3. Choose vEdge 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 pane, click 18.4.0 under Latest Release.
     3. Choose vManage upgrade image.

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 These vulnerabilities were 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.

Subscribe to Cisco Security Notifications

  o Subscribe

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-escal

Revision History

  o 
    +----------+---------------------------+----------+--------+------------------+
    | Version  |        Description        | Section  | Status |       Date       |
    +----------+---------------------------+----------+--------+------------------+
    | 1.0      | Initial public release.   |          | Final  | 2019-January-23  |
    +----------+---------------------------+----------+--------+------------------+

- --------------------------------------------------------------------------------

Cisco SD-WAN Solution Unauthorized Access Vulnerability

Priority:        High

Advisory ID:     cisco-sa-20190123-sdwan-unaccess

First Published: 2019 January 23 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvm25940

CVE-2019-1647    

CWE-284

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

Summary

  o A vulnerability in the Cisco SD-WAN Solution could allow an authenticated,
    adjacent attacker to bypass authentication and have direct unauthorized
    access to other vSmart containers.

    The vulnerability is due to an insecure default configuration of the
    affected system. An attacker could exploit this vulnerability by directly
    connecting to the exposed services. An exploit could allow the attacker to
    retrieve and modify critical system files.

    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-20190123-sdwan-unaccess

Affected Products

  o Vulnerable Products

    This vulnerability affects any Cisco vSmart Controller Software versions
    running on top of a vContainer release of the Cisco SD-WAN Solution prior
    to Release 18.4.0.

    This vulnerability affects only the Cisco-hosted vContainer for the Cisco
    SD-WAN Solution. The fixed software must be deployed by Cisco at the
    request of the customer. There is no fixed software for Cisco customers to
    download and deploy for this vulnerability. Customers must engage their
    Cisco support contact to ensure the deployment of the latest software fix.

    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 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.

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.

Subscribe to Cisco Security Notifications

  o Subscribe

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-unaccess

Revision History

  o 
    +----------+---------------------------+----------+--------+------------------+
    | Version  |        Description        | Section  | Status |       Date       |
    +----------+---------------------------+----------+--------+------------------+
    | 1.0      | Initial public release.   |          | Final  | 2019-January-23  |
    +----------+---------------------------+----------+--------+------------------+


- --------------------------------------------------------------------------------
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-sol-escal

Cisco SD-WAN Solution Privilege Escalation Vulnerability

Priority:        High

Advisory ID:     cisco-sa-20190123-sdwan-sol-escal

First Published: 2019 January 23 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvi69985

CVE-2019-1648    

CWE-264

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

Summary

  o A vulnerability in the user group configuration of the Cisco SD-WAN
    Solution could allow an authenticated, local attacker to gain elevated
    privileges on an affected device.

    The vulnerability is due to a failure to properly validate certain
    parameters included within the group configuration. An attacker could
    exploit this vulnerability by writing a crafted file to the directory
    where the user group configuration is located in the underlying operating
    system. A successful exploit could allow the attacker to gain root-level
    privileges and take full control of the device.

    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-20190123-sdwan-sol-escal

Affected Products

  o Vulnerable Products

    This vulnerability affects the following Cisco products if they are
    running a release of the Cisco SD-WAN Solution prior to Release 18.4.0:

       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

  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/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

    Cisco fixed this vulnerability in Cisco SD-WAN Solution Release 18.4.0.

    Customers can download the Cisco SD-WAN Solution from the Software Center
    on Cisco.com by clicking Browse all and navigating to the following
    locations:

    vBond, vEdge Cloud, and vSmart

     1. Navigate to Routers > Software-Defined WAN (SD-WAN) > SD-WAN > SD-WAN
        Software Update.
     2. From the left panel, click 18.4.0 under Latest Release.
     3. Choose vSmart, vEdge Cloud and vBond 18.4.0 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 18.4.0 under Latest Release.
     3. Choose vEdge 18.4.0  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 18.4.0 under Latest Release.
     3. Choose vManage 18.4.0 upgrade image.

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.

Subscribe to Cisco Security Notifications

  o Subscribe

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-sol-escal

Revision History

  o 
    +----------+---------------------------+----------+--------+------------------+
    | Version  |        Description        | Section  | Status |       Date       |
    +----------+---------------------------+----------+--------+------------------+
    | 1.0      | Initial public release.   |          | Final  | 2019-January-23  |
    +----------+---------------------------+----------+--------+------------------+

- --------------------------------------------------------------------------------

Cisco SD-WAN Solution Buffer Overflow Vulnerability

Priority:        Critical

Advisory ID:     cisco-sa-20190123-sdwan-bo

First Published: 2019 January 23 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvm25955

CVE-2019-1651    

CWE-119

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

Summary

  o A vulnerability in the vContainer of the Cisco SD-WAN Solution could allow
    an authenticated, remote attacker to cause a denial of service (DoS)
    condition and execute arbitrary code as the root user.

    The vulnerability is due to improper bounds checking by the vContainer. An
    attacker could exploit this vulnerability by sending a malicious file to
    an affected vContainer instance. A successful exploit could allow the
    attacker to cause a buffer overflow condition on the affected vContainer,
    which could result in a DoS condition that the attacker could use to
    execute arbitrary code as 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:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-bo

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco vSmart Controller Software running a
    release of the Cisco SD-WAN Solution prior to Release 18.4.0.

    This vulnerability affects only the Cisco-hosted vContainer for the Cisco
    SD-WAN Solution. The fixed software must be deployed by Cisco at the
    request of the customer. There is no fixed software for Cisco customers to
    download and deploy for this vulnerability. Customers must engage their
    Cisco support contact to ensure the deployment of the latest software fix.

    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 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.

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.

Subscribe to Cisco Security Notifications

  o Subscribe

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-bo

Revision History

  o 
    +----------+---------------------------+----------+--------+------------------+
    | Version  |        Description        | Section  | Status |       Date       |
    +----------+---------------------------+----------+--------+------------------+
    | 1.0      | Initial public release.   |          | Final  | 2019-January-23  |
    +----------+---------------------------+----------+--------+------------------+


- --------------------------------------------------------------------------------
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-file-write

Cisco SD-WAN Solution Arbitrary File Overwrite Vulnerability

Priority:        High

Advisory ID:     cisco-sa-20190123-sdwan-file-write

First Published: 2019 January 23 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvi69862

CVE-2019-1650    

CWE-20

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

Summary

  o A vulnerability in the Cisco SD-WAN Solution could allow an authenticated,
    remote attacker to overwrite arbitrary files on the underlying operating
    system of an affected device.

    The vulnerability is due to improper input validation of the save command
    in the CLI of the affected software. An attacker could exploit this
    vulnerability by modifying the save command in the CLI of an affected
    device. A successful exploit could allow the attacker to overwrite
    arbitrary files on the underlying operating system of an affected device
    and escalate their privileges to 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:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-file-write

Affected Products

  o Vulnerable Products

    This vulnerability affects the following Cisco products if they are
    running a release of the Cisco SD-WAN Solution prior to Release 18.4.0:

       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

  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/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

    Cisco fixed this vulnerability in Cisco SD-WAN Solution Release 18.4.0.

    Customers can download the Cisco SD-WAN Solution from the Software Center
    on Cisco.com by clicking Browse all and navigating to the following
    locations:

    vBond, vEdge Cloud, and vSmart

     1. Navigate to Routers > Software-Defined WAN (SD-WAN) > SD-WAN > SD-WAN
        Software Update.
     2. From the left panel, click 18.4.0 under Latest Release.
     3. Choose vSmart, vEdge Cloud and vBond 18.4.0 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 18.4.0 under Latest Release.
     3. Choose vEdge 18.4.0  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 18.4.0 under Latest Release.
     3. Choose vManage 18.4.0 upgrade image.

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.

Subscribe to Cisco Security Notifications

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URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-file-write

Revision History

  o 
    +----------+---------------------------+----------+--------+------------------+
    | Version  |        Description        | Section  | Status |       Date       |
    +----------+---------------------------+----------+--------+------------------+
    | 1.0      | Initial public release.   | --        | Final  | 2019-January-23  |
    +----------+---------------------------+----------+--------+------------------+

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

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