Vulnerability identifier: #VU47946

Vulnerability risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3458

CWE-ID: CWE-693

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Cisco Adaptive Security Appliance (ASA)
Hardware solutions / Security hardware applicances
Cisco Firepower Threat Defense (FTD)
Hardware solutions / Security hardware applicances
Firepower 1000 Series Appliances
Hardware solutions / Other hardware appliances
Firepower 2100 Series Security Appliance
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to insufficient protections of the secure boot process. A local administrator can inject code into specific files that are then referenced during the device boot process, 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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 9.8 - 9.14

Cisco Firepower Threat Defense (FTD): 6.2.2, 6.2.3, 6.3.0, 6.4.0, 6.5.0, 6.6.0

Firepower 1000 Series Appliances: All versions

Firepower 2100 Series Security Appliance: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fxos-sbbyp-KqP6NgrE

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.