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             AUSCERT External Security Bulletin Redistribution

Cisco Software-Defined Application Visibility and Control on Cisco vManage
                Static Username and Password Vulnerability
                             29 September 2022


        AusCERT Security Bulletin Summary

Product:           Cisco vManage
Publisher:         Cisco Systems
Operating System:  Cisco
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-20844  

Original Bulletin: 

Comment: CVSS (Max):  5.3 CVE-2022-20844 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
         CVSS Source: Cisco Systems
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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Cisco Software-Defined Application Visibility and Control on Cisco vManage
Static Username and Password Vulnerability

Priority:        Medium
Advisory ID:     cisco-sa-sdavc-ZA5fpXX2
First Published: 2022 September 28 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvz97362
CVE Names:       CVE-2022-20844
CWEs:            CWE-798


  o A vulnerability in authentication mechanism of Cisco Software-Defined
    Application Visibility and Control (SD-AVC) on Cisco vManage could allow an
    unauthenticated, remote attacker to access the GUI of Cisco SD-AVC using a
    default static username and password combination.

    This vulnerability exists because the GUI is accessible on self-managed
    cloud installations or local server installations of Cisco vManage. An
    attacker could exploit this vulnerability by accessing the exposed GUI of
    Cisco SD-AVC. A successful exploit could allow the attacker to view managed
    device names, SD-AVC logs, and SD-AVC DNS server IP addresses.

    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

    At the time of publication, this vulnerability affected self-managed cloud
    installations or local server installations of Cisco vManage that have
    SD-AVC enabled.

    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.

    Note: Installations of cloud-based servers that are provided fully
    configured by the Cisco Cloud Operations Team do not expose the SD-AVC GUI.
    If, at the request of the customer, the SD-AVC GUI has been exposed, that
    environment is affected by this vulnerability.

    Products Confirmed Not Vulnerable

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


  o There are no workarounds that address this vulnerability.

    However, as a mitigation for this vulnerability, customers who have enabled
    the SD-AVC component can ensure that access from northbound networks to TCP
    port 10502 is restricted.

    While this mitigation has been deployed and was proven successful in a test
    environment, customers should determine the applicability and effectiveness
    in their own environment and under their own use conditions. Customers
    should be aware that any workaround or mitigation that is implemented may
    negatively impact the functionality or performance of their network based
    on intrinsic customer deployment scenarios and limitations. Customers
    should not deploy any workarounds or mitigations before first evaluating
    the applicability to their own environment and any impact to such

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

    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 vulnerabilities that are
    described in this advisory and which release included the fix for these

         Cisco vManage Release                  First Fixed Release
    18.3 and earlier                 Not affected.
    18.4                             Not affected.
    19.2                             Not affected.
    20.1                             Not affected.
    20.3.2 through 20.3.4            Not affected.                         Migrate to a fixed release.
    20.4                             Migrate to a fixed release.
    20.5                             Migrate to a fixed release.
    20.6                             20.6.3 ^1
    20.7                             20.7.2 ^1
    20.8                             20.8.1 ^1
    20.9                             20.9.1

    1. Upgrading to Release 20.6.3, 20.7.2, or 20.8.1 causes the SD-AVC
    container to shut down. To enable the SD-AVC container, do the following:
       Enable SD-AVC.
       Reboot vManage.
       Reboot vManage a second time.

    Note: The vulnerability described in this advisory is associated with the
    vulnerability described in Cisco Security Advisory
    cisco-sa-sdwan-avc-NddSGB8 . Cisco recommends that administrators take into
    account both vulnerabilities when planning for a software upgrade.

    The Cisco Product Security Incident Response Team (PSIRT) validates only
    the affected and fixed release information that is documented in this

Exploitation and Public Announcements

  o The Cisco 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 the resolution of a Cisco TAC support

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.

Related to This Advisory



  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdavc-ZA5fpXX2

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    | 1.0      | Initial public release.   | -        | Final  | 2022-SEP-28  |

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