CVE-2022-20826: Cisco Security Advisory: Cisco Secure Firewall 3100 Series Secure Boot Bypass Vulnerability

• 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 center column lists the firmware bundle version that includes the fix for the vulnerability that is described in this advisory. The right column lists the first software release that includes the fixed firmware bundle. Customers are advised to upgrade to an appropriate fixed software release as indicated in this section.

  Cisco ASA Software Release

  First Fixed Firmware Bundle Version

  First Fixed Release That Includes the Fixed Firmware Bundle

  9.17

  1.0.22

  9.17.1.15

  9.18

  1.2.17

  9.18.2

Cisco FTD Software Release

First Fixed Firmware Bundle Version

First Fixed Release That Includes the Fixed Firmware Bundle

7.1

1.0.22

7.1.0.2

7.2

1.2.17

7.2.1

**Note**: When Cisco ASA Software or FTD Software is upgraded on a device, the firmware bundle version is also upgraded automatically. If the Cisco ASA Software or FTD Software is later downgraded, the firmware bundle version is not downgraded. Once the firmware bundle is upgraded to a fixed version, it will remain fixed, even if the Cisco ASA Software or FTD Software is downgraded.

For instructions on upgrading your FTD device, see Cisco Firepower Management Center Upgrade Guide.

  
**Additional Resources**

For help determining the best Cisco ASA, FTD, or FMC Software release, see the following Recommended Releases documents. If a security advisory recommends a later release, Cisco recommends following the advisory guidance.

Cisco ASA Compatibility  
Cisco Secure Firewall ASA Upgrade Guide  
Cisco Secure Firewall Threat Defense Compatibility Guide

The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.