Information disclosure in Cisco Aironet Access Points

1) Information disclosure

EUVDB-ID: #VU51720

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-1437

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to an unrestricted Trivial File Transfer Protocol (TFTP) configuration in the FlexConnect Upgrade feature. A remote attacker can send a specific TFTP request and gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Aironet 1540 Series Access Points: 8.10.112.0 - 17.3

Cisco Aironet 1560 Series Access Points: 8.10.112.0 - 17.3

Cisco Aironet 1800 Series Access Points: 8.10.112.0 - 17.3

Cisco Aironet 2800 Series Access Points: 8.10.112.0 - 17.3

Cisco Aironet 3800 Series Access Points: 8.10.112.0 - 17.3

Cisco 4800 Aironet Access Points: 8.10.112.0 - 17.3

Cisco Catalyst 9100: 8.10.112.0 - 17.3

Cisco Catalyst IW 6300: 8.10.112.0 - 17.3

Integrated AP on 1100 Integrated Services Routers: 8.10.112.0 - 17.3

Cisco ESW6300 Series Access Points: 8.10.112.0 - 17.3

CPE2.3

• cpe:2.3:h:cisco_systems:cisco_aironet_1540_series:8.10.112.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_1540_series:17.1:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_1540_series:17.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_1560_series:8.10.112.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_1560_series:17.1:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_1560_series:17.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_1800_series_access_points:8.10.112.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_1800_series_access_points:17.1:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_1800_series_access_points:17.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_2800_series_access_points:8.10.112.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_aironet_3800_series_access_points:8.10.112.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_4800_aironet_access_points:8.10.112.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_catalyst_9100:8.10.112.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_catalyst_iw_6300:8.10.112.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:integrated_ap_on_1100_integrated_services_routers:8.10.112.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_esw6300_series_access_points:8.10.112.0:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aironet-info-disc-BfWqghj

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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