CVE-2020-3455: medium-severity vulnerability in Cisco Firepower Extensible Operating System…
Cisco FXOS Software for Firepower 4100/9300 Series Appliances Secure Boot Bypass Vulnerability
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.7epss 0.3%
A vulnerability in the secure boot process of Cisco FXOS Software could allow an authenticated, local attacker to bypass the secure boot mechanisms. The vulnerability is due to insufficient protections of the secure boot process. An attacker could exploit this vulnerability by injecting code into a specific file that is then referenced during the device boot process. A successful exploit could allow the attacker to break the chain of trust and inject code into the boot process of the device which would be executed at each boot and maintain persistence across reboots.
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected products
Cisco · Cisco Firepower Extensible Operating System (FXOS)Related CVEs — Cisco Firepower Extensible Operating System…
In the same product, most dangerous first.
CVE-2019-1858HIGHCisco FXOS and NX-OS Software Simple Network Management Protocol Denial of Service VulnerabilityEPSS 2.4%CVE-2019-12699HIGHCisco FXOS Software and Firepower Threat Defense Software Command Injection VulnerabilitiesEPSS 0.9%CVE-2026-20099MEDIUMCisco UCS Manager and FXOS Software Command Injection VulnerabilityEPSS 0.7%CVE-2023-20200HIGHCVE-2023-20200EPSS 0.7%CVE-2019-1700MEDIUMCisco Firepower 9000 Series Firepower 2-Port 100G Double-Width Network Module Queue Wedge Denial of Service VulnerabilityEPSS 0.5%CVE-2020-3169MEDIUMCisco FXOS Software CLI Command Injection VulnerabilityEPSS 0.4%