Multiple vulnerabilities in Cisco Wireless LAN Controller (WLC)

Published: 2020-04-16

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-3273 CVE-2020-3262
CWE-ID	CWE-119 CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Cisco Wireless LAN Controller Hardware solutions / Firmware
Vendor	Cisco Systems, Inc

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU26973

Risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3273

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when processing the 802.11 Generic Advertisement Service (GAS) frames. A remote attacker can send a specially crafted 802.11 GAS frame over the air to an access point (AP), trigger memory corruption and cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Wireless LAN Controller: 8.5 - 8.10

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-gas-dos-8FsE3AWH

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.

2) Input validation error

EUVDB-ID: #VU26974