Vulnerability Name:

CVE-2022-20826 (CCN-240207)

Assigned:2021-11-02
Published:2022-11-09
Updated:2022-11-18
Summary: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.
CVSS v3 Severity:6.8 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
5.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Physical
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
6.4 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
5.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Physical
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:6.2 Medium (CCN CVSS v2 Vector: AV:L/AC:H/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-Other
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2022-20826

Source: XF
Type: UNKNOWN
cisco-secure-cve202220826-sec-by(240207)

Source: CCN
Type: Cisco Security Advisory cisco-sa-fw3100-secure-boot-5M8mUh26
Cisco Secure Firewall 3100 Series Secure Boot Bypass Vulnerability

Source: MISC
Type: Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fw3100-secure-boot-5M8mUh26

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cisco:adaptive_security_appliance:9.17.1:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.17.1.9:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.17.1.10:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.17.1.13:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.18.1:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance:9.18.1.3:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:secure_firewall_3110:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:secure_firewall_3120:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:secure_firewall_3130:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:secure_firewall_3140:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:secure_firewall_3105:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/a:cisco:firepower_threat_defense:7.1.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:firepower_threat_defense:7.2.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:firepower_threat_defense:7.2.0.1:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:secure_firewall_3110:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:secure_firewall_3120:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:secure_firewall_3130:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:secure_firewall_3140:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:secure_firewall_3105:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco adaptive security appliance 9.17.1
    cisco adaptive security appliance 9.17.1.9
    cisco adaptive security appliance 9.17.1.10
    cisco adaptive security appliance 9.17.1.13
    cisco adaptive security appliance 9.18.1
    cisco adaptive security appliance 9.18.1.3
    cisco secure firewall 3110 -
    cisco secure firewall 3120 -
    cisco secure firewall 3130 -
    cisco secure firewall 3140 -
    cisco secure firewall 3105 -
    cisco firepower threat defense 7.1.0.0
    cisco firepower threat defense 7.2.0.0
    cisco firepower threat defense 7.2.0.1
    cisco secure firewall 3110 -
    cisco secure firewall 3120 -
    cisco secure firewall 3130 -
    cisco secure firewall 3140 -
    cisco secure firewall 3105 -