Summary

• A vulnerability in the restricted security domain implementation of Cisco Application Policy Infrastructure Controller (APIC) could allow an authenticated, remote attacker to read, modify, or delete non-tenant policies (for example, access policies) created by users associated with a different security domain on an affected system.

  This vulnerability is due to improper access control when restricted security domains are used to implement multi-tenancy for policies outside the tenant boundaries. An attacker with a valid user account associated with a restricted security domain could exploit this vulnerability. A successful exploit could allow the attacker to read, modify, or delete policies created by users associated with a different security domain. Exploitation is not possible for policies under tenants that an attacker has no authorization to access.

  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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-uapa-F4TAShk

Affected Products

• Vulnerable Products

  At the time of publication, this vulnerability affected Cisco APIC when restricted security domains were configured.

  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 at the top of this advisory for the most complete and current information.

  Determine Restricted Security Domain Configuration

  To determine whether restricted security domains are configured, run the moquery -c aaaDomain -f 'aaa.Domain.restrictedRbacDomain=="yes"' | egrep dn command at the device CLI, as shown in the following example:

  apic1-mdr1# moquery -c aaaDomain -f 'aaa.Domain.restrictedRbacDomain=="yes"' | egrep dn
  dn                   : uni/userext/domain-test1
  dn                   : uni/userext/domain-test2

  If no entries are returned, the configuration is not 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.

  Cisco has confirmed that this vulnerability does not affect Cisco Cloud Network Controller.

Details

• Restricted security domains are used to provide multi-tenancy capabilities in policies and profiles outside of the tenant level. Even if these policies and profiles do not belong to any tenant, by using separated restricted security domains for each tenant, users from each tenant can create policies and profiles that are hidden to users in other tenants.

  For more information about restricting access using security domains, see the Cisco APIC Security Configuration Guide.

Workarounds

• There are no workarounds that address this vulnerability.

Fixed Software

• 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 was accurate. See the Details section in the bug ID 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 APIC Release	First Fixed Release
  5.0 and earlier	Not vulnerable
  5.1	Not vulnerable
  5.21	5.2(8d)
  6.0	6.0(3d)

  1. Version 5.2(6e) is the first vulnerable release in this release train up to the first fixed release.

  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

• The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Source

• This vulnerability was found during internal security testing.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-uapa-F4TAShk

Revision History

• Version	Description	Section	Status	Date
  1.0	Initial public release.	-	Final	2023-AUG-23

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