CVE-2022-20826 : A vulnerability in the secure boot implementation of Cisco Secure Firewalls 3100

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.

Published 2022-11-15 21:15:23

Updated 2024-01-25 17:15:15

Source Cisco Systems, Inc.

View at NVD, CVE.org

Products affected by CVE-2022-20826

Cisco » Adaptive Security Appliance Software » Version: 9.17.1
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.17.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Secure Firewall 3105 » Version: N/A
When used together with: Cisco » Secure Firewall 3110 » Version: N/A
When used together with: Cisco » Secure Firewall 3120 » Version: N/A
When used together with: Cisco » Secure Firewall 3130 » Version: N/A
When used together with: Cisco » Secure Firewall 3140 » Version: N/A
Cisco » Adaptive Security Appliance Software » Version: 9.17.1.9
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.17.1.9:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Secure Firewall 3105 » Version: N/A
When used together with: Cisco » Secure Firewall 3110 » Version: N/A
When used together with: Cisco » Secure Firewall 3120 » Version: N/A
When used together with: Cisco » Secure Firewall 3130 » Version: N/A
When used together with: Cisco » Secure Firewall 3140 » Version: N/A
Cisco » Adaptive Security Appliance Software » Version: 9.17.1.10
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.17.1.10:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Secure Firewall 3105 » Version: N/A
When used together with: Cisco » Secure Firewall 3110 » Version: N/A
When used together with: Cisco » Secure Firewall 3120 » Version: N/A
When used together with: Cisco » Secure Firewall 3130 » Version: N/A
When used together with: Cisco » Secure Firewall 3140 » Version: N/A
Cisco » Adaptive Security Appliance Software » Version: 9.17.1.13
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.17.1.13:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Secure Firewall 3105 » Version: N/A
When used together with: Cisco » Secure Firewall 3110 » Version: N/A
When used together with: Cisco » Secure Firewall 3120 » Version: N/A
When used together with: Cisco » Secure Firewall 3130 » Version: N/A
When used together with: Cisco » Secure Firewall 3140 » Version: N/A
Cisco » Adaptive Security Appliance Software » Version: 9.18.1
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Secure Firewall 3105 » Version: N/A
When used together with: Cisco » Secure Firewall 3110 » Version: N/A
When used together with: Cisco » Secure Firewall 3120 » Version: N/A
When used together with: Cisco » Secure Firewall 3130 » Version: N/A
When used together with: Cisco » Secure Firewall 3140 » Version: N/A
Cisco » Adaptive Security Appliance Software » Version: 9.18.1.3
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.1.3:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Secure Firewall 3105 » Version: N/A
When used together with: Cisco » Secure Firewall 3110 » Version: N/A
When used together with: Cisco » Secure Firewall 3120 » Version: N/A
When used together with: Cisco » Secure Firewall 3130 » Version: N/A
When used together with: Cisco » Secure Firewall 3140 » Version: N/A
Cisco » Firepower Threat Defense » Version: 7.1.0.0
cpe:2.3:a:cisco:firepower_threat_defense:7.1.0.0:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Secure Firewall 3105 » Version: N/A
When used together with: Cisco » Secure Firewall 3110 » Version: N/A
When used together with: Cisco » Secure Firewall 3120 » Version: N/A
When used together with: Cisco » Secure Firewall 3130 » Version: N/A
When used together with: Cisco » Secure Firewall 3140 » Version: N/A
Cisco » Firepower Threat Defense » Version: 7.2.0.0
cpe:2.3:a:cisco:firepower_threat_defense:7.2.0.0:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Secure Firewall 3105 » Version: N/A
When used together with: Cisco » Secure Firewall 3110 » Version: N/A
When used together with: Cisco » Secure Firewall 3120 » Version: N/A
When used together with: Cisco » Secure Firewall 3130 » Version: N/A
When used together with: Cisco » Secure Firewall 3140 » Version: N/A
Cisco » Firepower Threat Defense » Version: 7.2.0.1
cpe:2.3:a:cisco:firepower_threat_defense:7.2.0.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Secure Firewall 3105 » Version: N/A
When used together with: Cisco » Secure Firewall 3110 » Version: N/A
When used together with: Cisco » Secure Firewall 3120 » Version: N/A
When used together with: Cisco » Secure Firewall 3130 » Version: N/A
When used together with: Cisco » Secure Firewall 3140 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2022-20826

EPSS FAQ

0.06%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 24 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2022-20826

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.8	MEDIUM	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	0.9	5.9	NIST
Attack Vector: Physical Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
6.4	MEDIUM	CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	0.5	5.9	Cisco Systems, Inc.
Attack Vector: Physical Attack Complexity: High Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2022-20826

CWE-501 Trust Boundary Violation

The product mixes trusted and untrusted data in the same data structure or structured message.

Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2022-20826

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fw3100-secure-boot-5M8mUh26

Cisco Secure Firewall 3100 Series Secure Boot Bypass Vulnerability
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fw3100-secure-boot-5M8mUh26

Cisco Secure Firewall 3100 Series Secure Boot Bypass Vulnerability
Vendor Advisory

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Vulnerability Details : CVE-2022-20826

Products affected by CVE-2022-20826

Exploit prediction scoring system (EPSS) score for CVE-2022-20826

CVSS scores for CVE-2022-20826

CWE ids for CVE-2022-20826

References for CVE-2022-20826