Vulnerability identifier: #VU51729

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-2021-1449

CWE-ID: CWE-284

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Cisco Aironet 1540 Series Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Aironet 1560 Series Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Aironet 1800 Series Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Aironet 2800 Series Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Aironet 3800 Series Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco 4800 Aironet Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Catalyst 9100
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Catalyst IW 6300
Hardware solutions / Routers & switches, VoIP, GSM, etc
Integrated AP on 1100 Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco ESW6300 Series Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to an improper check that is performed by the area of code that manages system startup processes. A local administrator can modify a specific file that is stored on the system, execute unsigned code at boot time and bypass the software image verification check part of the secure boot process.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Aironet 1540 Series Access Points: 8.5 - 17.4

Cisco Aironet 1560 Series Access Points: 8.5 - 17.4

Cisco Aironet 1800 Series Access Points: 8.5 - 17.4

Cisco Aironet 2800 Series Access Points: 8.5 - 17.4

Cisco Aironet 3800 Series Access Points: 8.5 - 17.4

Cisco 4800 Aironet Access Points: 8.5 - 17.4

Cisco Catalyst 9100: 8.5 - 17.4

Cisco Catalyst IW 6300: 8.5 - 17.4

Integrated AP on 1100 Integrated Services Routers: 8.5 - 17.4

Cisco ESW6300 Series Access Points: 8.5 - 17.4

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-privesc-wEVfp8Ud

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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.