Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0698 Cisco ACI Multi-Site Orchestrator Application Services Engine Deployment Authentication Bypass Vulnerability 25 February 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco ACI Multi-Site Orchestrator (MSO) Publisher: Cisco Systems Operating System: Cisco Impact/Access: Administrator Compromise -- Remote/Unauthenticated Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-1388 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mso-authbyp-bb5GmBQv - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco ACI Multi-Site Orchestrator Application Services Engine Deployment Authentication Bypass Vulnerability Priority: Critical Advisory ID: cisco-sa-mso-authbyp-bb5GmBQv First Published: 2021 February 24 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvw14141 CVE Names: CVE-2021-1388 CWEs: CWE-269 Summary o A vulnerability in an API endpoint of Cisco ACI Multi-Site Orchestrator (MSO) installed on the Application Services Engine could allow an unauthenticated, remote attacker to bypass authentication on an affected device. The vulnerability is due to improper token validation on a specific API endpoint. An attacker could exploit this vulnerability by sending a crafted request to the affected API. A successful exploit could allow the attacker to receive a token with administrator-level privileges that could be used to authenticate to the API on affected MSO and managed Cisco Application Policy Infrastructure Controller (APIC) devices. 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-authbyp-bb5GmBQv Affected Products o Vulnerable Products This vulnerability affects Cisco ACI Multi-Site Orchestrator (MSO) running a 3.0 release of software only when deployed on a Cisco Application Services Engine. The MSO can be deployed in the following ways: MSO cluster in a Cisco Application Services Engine. The MSO software image can be identified by an 'aci' extension. MSO nodes deployed as VMs on a Hypervisor. The MSO software image can be identified by an 'ova' extension. For more information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory. 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. Fixed Software o Cisco has released free software updates that address the vulnerability described in this advisory. 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. 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, the left column lists Cisco software releases. The right column indicates whether a release is affected by the vulnerability 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 Multi-Site Orchestrator Software Release First Fixed Release for This Vulnerability Earlier than 2.2 Not vulnerable 2.2 Not vulnerable 3.0 ^1 3.0(3m) 3.1 Not vulnerable 3.2 Not vulnerable 1. Version 3.0(1i) is not vulnerable. All other 3.0 versions are vulnerable up to the first fixed release. 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. 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-authbyp-bb5GmBQv Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2021-FEB-24 | +----------+---------------------------+----------+--------+--------------+ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYDcA+ONLKJtyKPYoAQiBZQ/8CgHrWhcpIx0T/rFgbKDPwv2HjAFxHCv5 ZmWgEeh+7HDyiJCOJRmneTU04B5O+m5yNaDRmyS6FsFAaADiKRb4jfS+jpBF9NlN 5Io8PudIiaS4Cd61eG0PYHTgLJi/7UJLomYJrmnsdl4l3UK1uui89AR1j3o5VpsA PjiZYrigE9SuEuFyd6xcVVv0fM94uPQ5K2YBGUpxSY318XtXj19BVbcFoesBXgIy rR43xYFjq46fUJYsxDYk747wlEULWAUrVtLpyIG4d0lUwZcZTeWQgsRmwB/msXJz 43TrYMtAyEH3FJFWsJux76+h6AO6GD7mXuVgbO7m/wlchoN0GF2lSEMptU7p26Wu qZ97iU2MV56YLWcxc0W7/lCG+vi3PG3M2ZIUMiLQ07ECMEAUUAUo5QsKadL/B6Rl JMPQ6lOc2ZcKwBc00iatCsR7KKeOE4eDVUcXMUnaQykAUo25LQiBxJG4KdjC3GAI KFTHfUuI5oXVuT67NcOQOtWg3DeiYEbmppSyS476oCOqDK3tpUU+Ut4MH5Ys43TR 4EEbE0Ov7Tm5BJFGMjJuzsJ+r+c4wngH5XezuLBCCBgkD4Atv32UiCZIzgvRFDyJ NVOpHU9UrUJ7Nqi8XXsz5oLyLR7AtDEVGznDr+QlfTeGj/KX8voXSax8/KYkaQKc 1d1HEIkKemM= =7TLO -----END PGP SIGNATURE-----