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AUSCERT External Security Bulletin Redistribution
ESB-2022.4846
Cisco Software-Defined Application Visibility and Control on
Cisco vManage Authentication Bypass Vulnerability
29 September 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco vManage
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2022-20830
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-avc-NddSGB8
Comment: CVSS (Max): 5.3 CVE-2022-20830 (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
Authentication Bypass Vulnerability
Priority: Medium
Advisory ID: cisco-sa-sdwan-avc-NddSGB8
First Published: 2022 September 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvx43977
CVE Names: CVE-2022-20830
CWEs: CWE-306
Summary
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 without
authentication.
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:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-avc-NddSGB8
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected self-managed cloud
installations and 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.
Workarounds
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
environment.
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 that is
described in this advisory and which release included the fix for this
vulnerability.
Cisco vManage Release First Fixed Release
18.3 and earlier Not affected.
18.4 Migrate to a fixed release.
19.2 Migrate to a fixed release.
20.1 Migrate to a fixed release.
20.3 20.3.4.1
20.3.5
20.4 Migrate to a fixed release.
20.5 Migrate to a fixed release.
20.6 20.6.1
20.7 20.7.1
20.8 Not affected.
20.9 Not affected.
Note: The vulnerability described in this advisory is associated with the
vulnerability described in Cisco Security Advisory cisco-sa-sdavc-ZA5fpXX2
. 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
advisory.
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.
Source
o This vulnerability was found during the resolution of a Cisco TAC support
case.
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
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-avc-NddSGB8
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2022-SEP-28 |
+----------+---------------------------+----------+--------+--------------+
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