#VU47140 Resource exhaustion in Cisco Systems, Inc products - CVE-2020-3560

Vulnerability identifier: #VU47140

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-3560

CWE-ID: CWE-400

Exploitation vector: Network

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 Small Business 100 Series Wireless Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business 200 Series Smart Switches
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
Cisco ESW6300 Series Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc
Integrated Access Point on 1100 Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Catalyst 9800 Wireless Controller
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Business Access Points
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Wireless LAN Controller
Hardware solutions / Firmware

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of clients that are trying to connect to the AP. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Aironet 1540 Series Access Points: All versions

Cisco Aironet 1560 Series Access Points: All versions

Cisco Aironet 1800 Series Access Points: All versions

Cisco Aironet 2800 Series Access Points: All versions

Cisco Aironet 3800 Series Access Points: All versions

Cisco 4800 Aironet Access Points: All versions

Cisco Small Business 100 Series Wireless Access Points: All versions

Cisco Small Business 200 Series Smart Switches: All versions

Cisco Catalyst 9100: All versions

Cisco Catalyst IW 6300: All versions

Cisco ESW6300 Series Access Points: All versions

Integrated Access Point on 1100 Integrated Services Routers: All versions

Cisco Wireless LAN Controller: 8.5 - 8.10

Cisco Catalyst 9800 Wireless Controller: 16.12

Cisco Business Access Points: 10.0

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aironet-dos-VHr2zG9y

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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