cisco-sa-fw3100-secure-boot-5M8mUh26: Cisco Secure Firewall 3100 Series Secure Boot Bypass Vulnerability
First published: Wed Nov 09 2022(Updated: )
A vulnerability in the secure boot implementation of Cisco Secure Firewalls 3100 Series that are running Cisco Adaptive Security Appliance (ASA) Software or Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated attacker with physical access to the device to bypass the secure boot functionality. This vulnerability is due to a logic error in the boot process. An attacker could exploit this vulnerability by injecting malicious code into a specific memory location during the boot process of an affected device. A successful exploit could allow the attacker to execute persistent code at boot time and break the chain of trust. 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-fw3100-secure-boot-5M8mUh26 This advisory is part of the November 2022 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: November 2022 Semiannual Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA Software | =9.18<1.2.17=9.17<1.0.22 | 1.2.17 1.0.22 |
| Cisco FTD Software | =7.2<1.2.17=7.1<1.0.22 | 1.2.17 1.0.22 |
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Reference Links
Frequently Asked Questions
What is the Cisco Secure Firewall 3100 Series Secure Boot Bypass vulnerability?
A vulnerability in the secure boot implementation of Cisco Secure Firewalls 3100 Series that allows an unauthenticated attacker with physical access to bypass secure boot.
How can an attacker exploit the Cisco Secure Firewall 3100 Series Secure Boot Bypass vulnerability?
An attacker with physical access to the device can exploit this vulnerability.
What is the severity of the Cisco Secure Firewall 3100 Series Secure Boot Bypass vulnerability?
The severity of this vulnerability is medium with a CVSS score of 6.4.
How can I fix the Cisco Secure Firewall 3100 Series Secure Boot Bypass vulnerability?
To fix this vulnerability, upgrade to Cisco ASA Software version 9.18 or 1.2.17, or upgrade to Cisco FTD Software version 7.2 or 1.2.17.
Where can I find more information about the Cisco Secure Firewall 3100 Series Secure Boot Bypass vulnerability?
You can find more information about this vulnerability on the Cisco Security Advisory page: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fw3100-secure-boot-5M8mUh26
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