PT-2020-4435 · Cisco · Cisco Ios Xe

Published 2020-09-24 · Updated 2021-10-19 · CVE-2020-3494

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

AV:A/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 (affected versions not specified)

Description: The issue is related to insufficient validation of CAPWAP packets in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing, which could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition of an affected device. An attacker could exploit this by sending a malformed CAPWAP packet to an affected device, potentially causing the device to crash and reload.

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:2020-04974

CVE-2020-3494

Affected Products

Cisco Ios Xe

References · 6

• https://osv.dev/vulnerability/CVE-2020-3494 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-capwap-dos-TPdNTdyq · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-3494 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-capwap-dos-TPdNTdyq · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/657130 · Security Note
• https://bdu.fstec.ru/vul/2020-04974 · Security Note