Operating System:

[Cisco]

Published:

23 September 2021

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.3182
              Cisco SD-WAN Software multiple vulnerabilities
                             23 September 2021

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

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

Product:           Cisco SD-WAN Software
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Root Compromise                 -- Existing Account
                   Execute Arbitrary Code/Commands -- Existing Account
                   Access Confidential Data        -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-34726 CVE-2021-1546 

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-maapi-cmdinjec-znUYTuC
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sd-wan-Fhqh8pKX

Comment: This bulletin contains two (2) Cisco Systems security advisories.

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

Cisco SD-WAN Software Command Injection Vulnerability

Priority:        Medium
Advisory ID:     cisco-sa-sdwan-maapi-cmdinjec-znUYTuC
First Published: 2021 September 22 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvs98414
CVE Names:       CVE-2021-34726
CWEs:            CWE-77

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

Summary

  o A vulnerability in the CLI of Cisco SD-WAN Software could allow an
    authenticated, local attacker to inject arbitrary commands to be executed
    with root -level privileges on the underlying operating system of an
    affected device.

    This vulnerability is due to insufficient input validation on certain CLI
    commands. An attacker could exploit this vulnerability by authenticating to
    an affected device and submitting crafted input to the CLI. The attacker
    must be authenticated as an administrative user to execute the affected
    commands. A successful exploit could allow the attacker to execute commands
    with root -level privileges.

    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-sdwan-maapi-cmdinjec-znUYTuC

Affected Products

  o Vulnerable Products

    At the time of publication, this vulnerability affected the following Cisco
    products if they were running a vulnerable release of Cisco 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 were vulnerable at the
    time of publication, see the Fixed Software section of this advisory. 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.

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

       IOS Software
       IOS XR Software
       Meraki products
       NX-OS Software

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 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

    At the time of publication, the release information in the following table
    (s) was accurate. See the Details section in the bug ID(s) at the top of
    this advisory for the most complete and current information.

    The left column lists Cisco software releases, and the right column
    indicates whether a release was affected by the vulnerability described in
    this advisory and which release included the fix for this vulnerability.

    Cisco SD-WAN Software Release          First Fixed Release
    Earlier than 18.4                      Migrate to a fixed release.
    18.4                                   18.4.6
    19.2                                   19.2.3
    20.1                                   20.1.1.2 and 20.1.2
    20.3                                   20.3.1
    20.4                                   20.4.1
    20.5                                   20.5.1

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 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.

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-maapi-cmdinjec-znUYTuC

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    +----------+---------------------------+----------+--------+--------------+
    | 1.0      | Initial public release.   | -        | Final  | 2021-SEP-22  |
    +----------+---------------------------+----------+--------+--------------+


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


Cisco SD-WAN Software Information Disclosure Vulnerability

Priority:        Medium
Advisory ID:     cisco-sa-sd-wan-Fhqh8pKX
First Published: 2021 September 22 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvx79335
CVE Names:       CVE-2021-1546
CWEs:            CWE-209

Summary

  o A vulnerability in the CLI of Cisco SD-WAN Software could allow an
    authenticated, local attacker to access sensitive information.

    This vulnerability is due to improper protections on file access through
    the CLI. An attacker could exploit this vulnerability by running a CLI
    command that targets an arbitrary file on the local system. A successful
    exploit could allow the attacker to return portions of an arbitrary file,
    possibly resulting in the disclosure of sensitive information.

    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-sd-wan-Fhqh8pKX

Affected Products

  o Vulnerable Products

    At the time of publication, this vulnerability affected the following Cisco
    products if they were running a vulnerable release of Cisco 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 were vulnerable, see
    the Fixed Software section of this advisory. 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.

    Cisco has confirmed that this vulnerability does not affect Cisco IOS XE
    SD-WAN Software.

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 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

    At the time of publication, the release information in the following table
    (s) was accurate. See the Details section in the bug ID(s) at the top of
    this advisory for the most complete and current information.

    The left column lists Cisco software releases, and the right column
    indicates whether a release was affected by the vulnerability described in
    this advisory and which release included the fix for this vulnerability.

    Cisco SD-WAN Software Release          First Fixed Release
    18.4                                   Migrate to a fixed release.
    19.2                                   Migrate to a fixed release.
    20.3                                   Migrate to a fixed release.
    20.4                                   20.4.2
    20.5                                   20.5.2
    20.6                                   20.6.1

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 Cisco would like to thank Akhil Reddy and Yash Kumar of Societe Generale
    GSC for reporting this vulnerability.

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-Fhqh8pKX

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    +----------+---------------------------+----------+--------+--------------+
    | 1.0      | Initial public release.   | -        | Final  | 2021-SEP-22  |
    +----------+---------------------------+----------+--------+--------------+

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