PT-2020-4178 · Cisco · Cisco Ios Xe+2

Mathieu Monney · Published 2020-09-24 · Updated 2021-10-19 · CVE-2020-3492

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers and Cisco AireOS Software for Cisco Wireless LAN Controllers (WLC) (affected versions not specified)

Description: A vulnerability in the Flexible NetFlow Version 9 packet processor could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The issue is due to insufficient validation of certain parameters in a Flexible NetFlow Version 9 record. An attacker could exploit this by spoofing the address of an existing Access Point on the network and sending a Control and Provisioning of Wireless Access Points (CAPWAP) packet that includes a crafted Flexible NetFlow Version 9 record to an affected device, potentially causing a process crash that would lead to a reload of the device.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2020-04600

CVE-2020-3492

Affected Products

Cisco Aireos

Cisco Ios Xe

Cisco Wls

References · 6

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-wlc-fnfv9-EvrAQpNX · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-3492 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-wlc-fnfv9-EvrAQpNX · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-3492 · Security Note
• https://bdu.fstec.ru/vul/2020-04600 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/657130 · Security Note