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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0707 Cisco Application Services Engine Unauthorized Access Vulnerabilities 25 February 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Application Services Engine Publisher: Cisco Systems Operating System: Cisco Virtualisation Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Create Arbitrary Files -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-1396 CVE-2021-1393 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-case-mvuln-dYrDPC6w - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Application Services Engine Unauthorized Access Vulnerabilities Priority: Critical Advisory ID: cisco-sa-case-mvuln-dYrDPC6w First Published: 2021 February 24 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvw14124 CSCvw55819 CVE Names: CVE-2021-1393 CVE-2021-1396 CWEs: CWE-306 CWE-552 Summary o Multiple vulnerabilities in Cisco Application Services Engine could allow an unauthenticated, remote attacker to gain privileged access to host-level operations or to learn device-specific information, create diagnostic files, and make limited configuration changes. For more information about these vulnerabilities, see the Details section of this advisory. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-case-mvuln-dYrDPC6w Affected Products o Vulnerable Products These vulnerabilities affect Cisco Application Services Engine Software releases 1.1(3d) and earlier. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities. Details o The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit the other vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerability. Details about the vulnerabilities are as follows: CVE-2021-1393: Cisco Application Services Engine Unauthorized Service Access Vulnerability A vulnerability in Cisco Application Services Engine could allow an unauthenticated, remote attacker to access a privileged service on an affected device. The vulnerability is due to insufficient access controls for a service running in the Data Network. An attacker could exploit this vulnerability by sending crafted TCP requests to a specific service. A successful exploit could allow the attacker to have privileged access to run containers or invoke host-level operations. Bug ID(s): CSCvw14124 CVE ID: CVE-2021-1393 Security Impact Rating (SIR): Critical CVSS Base Score: 9.8 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. CVE-2021-1396: Cisco Application Services Engine Unauthorized API Access Vulnerability A vulnerability in Cisco Application Services Engine could allow an unauthenticated, remote attacker access to a specific API on an affected device. The vulnerability is due to insufficient access controls for an API running in the Data Network. An attacker could exploit this vulnerability by sending crafted HTTP requests to the affected API. A successful exploit could allow the attacker to learn device-specific information, create tech support files in an isolated volume, and make limited configuration changes. Bug ID(s): CSCvw55819 CVE ID: CVE-2021-1396 Security Impact Rating (SIR): Medium CVSS Base Score: 6.5 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Cisco Application Services Engine Networks Cisco Application Services Engine is deployed as a cluster, connecting each service node to two networks: Management Network using management interfaces. (mgmt0, mgmt1) Data Network using the fabric interfaces. (fabric0, fabric1) Management Network provides the following services: Accessing the Cisco Application Services Engine GUI. Accessing the CLI over SSH. DNS and NTP. Firmware uploads. InterSight device connector. Data Network provides the following services: Cisco Application Services Engine Clustering. App to app communication. Access to the management network of the Cisco ACI fabric. All app to ACI fabric communications. Workarounds o There are no workarounds that address these vulnerabilities. Fixed Software o Cisco has released free software updates that address the vulnerabilities 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 Customers are advised to upgrade to an appropriate fixed software release as indicated in the following table: Cisco Application Services Engine Software First Fixed Release for These Release Vulnerabilities 1.1 1.1(3e) 2.0 Not vulnerable 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 vulnerabilities that are described in this advisory. Source o These vulnerabilities were 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-case-mvuln-dYrDPC6w 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. 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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). 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