Input validation error in Cisco Systems, Inc products - CVE-2020-3494

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Main Vulnerability Database Vulnerabilities #VU47149

Input validation error in Cisco Systems, Inc products - CVE-2020-3494

Published: September 29, 2020


Vulnerability identifier: #VU47149
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-3494
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability: No public exploit available
Vulnerable software:
Cisco Catalyst 9800 Wireless Controller
Cisco Embedded Wireless Controller on Catalyst 9100 Access Points
Cisco IOS XE
Software vendor:
Cisco Systems, Inc

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. A remote attacker on the local network can send a specially crafted CAPWAP packet and perform a denial of service (DoS) attack.

This vulnerability affects the following products running a vulnerable release of Cisco IOS XE Software:

  • Catalyst 9800 Embedded Wireless Controller for Catalyst 9300, 9400, and 9500 Series Switches
  • Catalyst 9800 Series Wireless Controllers
  • Embedded Wireless Controller on Catalyst 9100 Access Points

Remediation

Install updates from vendor's website.

External links