PT-2020-4437 · Cisco · Cisco Ios Xe

Fabian Beck · Published 2020-09-24 · Updated 2020-10-07 · CVE-2020-3399

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 (affected versions not specified)

Description: The issue is related to errors in processing input data in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. This could allow a remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation during CAPWAP packet processing, which can be exploited by sending a crafted CAPWAP packet to an affected device, resulting in a buffer over-read. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.

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

DoS

Buffer Over-read

Out of bounds Read

Weakness Enumeration

CWE-126

CWE-125

Related Identifiers

BDU:2020-04977

CVE-2020-3399

Affected Products

Cisco Ios Xe

References · 6

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-capwap-dos-ShFzXf · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-3399 · Security Note
• https://bdu.fstec.ru/vul/2020-04977 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-capwap-dos-ShFzXf · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-3399 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/657130 · Security Note