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AUSCERT External Security Bulletin Redistribution
ESB-2022.4194
Cisco ACI Multi-Site Orchestrator Privilege Escalation Vulnerability
25 August 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco ACI MSO
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2022-20921
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mso-prvesc-BPFp9cZs
Comment: CVSS (Max): 8.8 CVE-2022-20921 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: Cisco Systems
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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Cisco ACI Multi-Site Orchestrator Privilege Escalation Vulnerability
Priority: High
Advisory ID: cisco-sa-mso-prvesc-BPFp9cZs
First Published: 2022 August 24 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCwb95851
CVE Names: CVE-2022-20921
CWEs: CWE-285
Summary
o A vulnerability in the API implementation of Cisco ACI Multi-Site
Orchestrator (MSO) could allow an authenticated, remote attacker to elevate
privileges on an affected device.
This vulnerability is due to improper authorization on specific APIs. An
attacker could exploit this vulnerability by sending crafted HTTP requests.
A successful exploit could allow an attacker who is authenticated with non-
Administrator privileges to elevate to Administrator privileges on an
affected 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-mso-prvesc-BPFp9cZs
Affected Products
o Vulnerable Products
This vulnerability affects Cisco ACI MSO.
For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.
Note: For releases 3.4 and later, Cisco ACI MSO was renamed Cisco Nexus
Dashboard Orchestrator (NDO).
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 NDO.
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 with service contracts that entitle
them to regular software updates should obtain security fixes through their
usual update channels.
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.
The Cisco Support and Downloads page on Cisco.com provides information
about licensing and downloads. This page can also display customer device
support coverage for customers who use the My Devices tool.
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.
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
In the following table(s), the left column lists Cisco software releases.
The right column indicates whether a release is affected by the
vulnerability that is described in this advisory and the first release that
includes the fix for this vulnerability. Customers are advised to upgrade
to an appropriate fixed software release as indicated in this section.
Cisco ACI MSO Release First Fixed Release
3.0 and earlier Migrate to a fixed release.
3.1 3.1(1n)
3.2 and later Not vulnerable.
Note: Releases 3.2 and later require Cisco ACI MSO to be installed in Cisco
Nexus Dashboard.
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 aware that proof of concept is available for the
vulnerability that is described in this advisory.
The Cisco PSIRT is not aware of any malicious use of the vulnerability that
is described in this advisory.
Source
o Cisco would like to thank Vipin Chaudhary of Securify B.V. 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-mso-prvesc-BPFp9cZs
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2022-AUG-24 |
+----------+---------------------------+----------+--------+--------------+
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