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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.1611.3 Cisco IOS XE Software for Cisco Catalyst 9000 Family Switches and Catalyst 9000 Family Wireless Controllers Privilege Escalation Vulnerability 13 May 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco IOS XE Software Publisher: Cisco Systems Operating System: Cisco Resolution: Patch/Upgrade CVE Names: CVE-2022-20681 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-priv-esc-ybvHKO5 Comment: CVSS (Max): 7.8 CVE-2022-20681 (CVSS:3.1/AV:L/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Revision History: May 13 2022: Updated releases in Cisco Software Checker. April 29 2022: Vendor added to vulnerable products list April 14 2022: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco IOS XE Software for Cisco Catalyst 9000 Family Switches and Catalyst 9000 Family Wireless Controllers Privilege Escalation Vulnerability Priority: High Advisory ID: cisco-sa-ewlc-priv-esc-ybvHKO5 First Published: 2022 April 13 16:00 GMT Last Updated: 2022 May 12 19:35 GMT Version 2.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvz37647 CVE Names: CVE-2022-20681 CWEs: CWE-266 Summary o May 12, 2022 Update: The information in the Cisco Software Checker was not complete when this advisory was first published. Customers should use the form in the Fixed Software section of this advisory to get the latest information about vulnerable releases and fixed releases. A vulnerability in the CLI of Cisco IOS XE Software for Cisco Catalyst 9000 Family Switches and Cisco Catalyst 9000 Family Wireless Controllers could allow an authenticated, local attacker to elevate privileges to level 15 on an affected device. This vulnerability is due to insufficient validation of user privileges after the user executes certain CLI commands. An attacker could exploit this vulnerability by logging in to an affected device as a low-privileged user and then executing certain CLI commands. A successful exploit could allow the attacker to execute arbitrary commands with level 15 privileges on the 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-ewlc-priv-esc-ybvHKO5 This advisory is part of the April 2022 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: April 2022 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. Affected Products o Vulnerable Products This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco IOS XE Software for Cisco Catalyst 9000 Family Switches or Cisco Catalyst 9000 Family Wireless Controllers: Catalyst 9300 Series Switches Catalyst 9400 Series Switches Catalyst 9500 Series Switches Catalyst 9600 Series Switches Catalyst 9800 Embedded Wireless Controllers for Catalyst 9300, 9400, and 9500 Series Switches Catalyst 9800 Series Wireless Controllers Catalyst 9800-CL Wireless Controllers for Cloud Embedded Wireless Controllers on Catalyst Access Points For 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. Cisco has confirmed that this vulnerability does not affect the following Cisco software: IOS Software IOS XR Software Meraki products NX-OS Software Wireless LAN Controller (WLC) AireOS Software 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. Cisco IOS and IOS XE Software To help customers determine their exposure to vulnerabilities in Cisco IOS and IOS XE Software, Cisco provides the Cisco Software Checker to identify any Cisco Security Advisories that impact a specific software release and the earliest release that fixes the vulnerabilities described in each advisory ("First Fixed"). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified ("Combined First Fixed"). Customers can use the Cisco Software Checker to search advisories in the following ways: Choose the software and one or more releases Upload a .txt file that includes a list of specific releases Enter the output of the show version command After initiating a search, customers can customize the search to include all Cisco Security Advisories, a specific advisory, or all advisories in the most recent bundled publication. Customers can also use the following form to determine whether a release is affected by any Cisco Security Advisory by entering a Cisco IOS or IOS XE Software release-for example, 15.1(4)M2 or 3.13.8S : [ ] [Check] By default, the Cisco Software Checker includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker on Cisco.com and check the Medium check box in the drop-down list under Impact Rating when customizing a search. 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 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 Cisco Event Response: April 2022 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-priv-esc-ybvHKO5 Revision History o +---------+----------------------------+-----------+--------+-------------+ | Version | Description | Section | Status | Date | +---------+----------------------------+-----------+--------+-------------+ | | Updated releases in Cisco | Summary | | | | 2.0 | Software Checker. Note | and Fixed | Final | 2022-MAY-12 | | | about update added to | Software | | | | | Summary. | | | | +---------+----------------------------+-----------+--------+-------------+ | 1.1 | Updated vulnerable | Affected | Final | 2022-APR-27 | | | products list. | Products | | | +---------+----------------------------+-----------+--------+-------------+ | 1.0 | Initial public release. | - | Final | 2022-APR-13 | +---------+----------------------------+-----------+--------+-------------+ - --------------------------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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBYn2fWckNZI30y1K9AQh5GxAApPgXfyrDWcK7R8mnHT+AsaOe2Fi+jExQ w0O2TpdcjQ4RhbF2XMiBQGcPqcbeRbw9lNUTDjLrLyvIBDLvwx6Zg/QN7D9RXyGJ R1QomiRYi5nBlX5F9ccnP3YRHBIZkhJByWrzcBUnkotSAP53bM0vzi4UPDGeivPU hYBX2UpXG6mhWvenZ1YIWdnxwfqL94aV3X+hV7lL4xkIbdv6t5o6IlRnPcSS7f3e NFqzTNK/luIpKmzK5NdrFOqIBPXAjXm736mPSdx9HM/e7x5kU8K65rqClDqcyqIs UuTfjJnOmReSdljZ9cuj8SmsCu5ys5z3nQ5X7Nst6ZXp16hjHQv+kc2mAVMmKglu ECmxvEYdI7stq1CfKdcN2Gxu9MYx1laeGjCdEbP+Wby+GKiQjZGH6MP3mlfqFRZV hI/wZlQxIMPTzISjjtCVPmHua9f7kSuzq7mEJh4F3Tlbp343A+DbZbYOB1P3oMIn JFf7iUQInene6NHPUYYw5Xoy4ZlZe34l7MMwX7vsOa7x2ErCyAVQJbfjeIP9dWeL 0Q2A4g9uJbF5bnD+LhYJCXCALUxY8AIOZcZ76yXoxfF7OBDm+vpNJIpakkhpqITs PzrAOy4OsCQWoy4eOP1boFNMH/Mqnuxl6O7A4FYQPUghW4tJH3vckSz8h84pQhkW c6fXSY2FQ9o= =nSk2 -----END PGP SIGNATURE-----