Vulnerabilities > CVE-2021-1373 - Buffer Over-read vulnerability in Cisco IOS XE

CVSS 8.6 - HIGH

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

NONE

Integrity impact

NONE

Availability impact

HIGH

network

low complexity

cisco

CWE-126

NVD

Published: 2021-03-24

Updated: 2023-11-07

Summary

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of an affected device. The vulnerability is due to insufficient validation of CAPWAP packets. An attacker could exploit this vulnerability by sending a malformed CAPWAP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.

Vulnerable Configurations

Part	Description	Count
OS	Cisco Cisco IOS XE 16.10.1 Cisco IOS XE 16.10.1E Cisco IOS XE 16.10.1S Cisco IOS XE 16.11.1 Cisco IOS XE 16.11.1A Cisco IOS XE 16.11.1B Cisco IOS XE 16.11.1C Cisco IOS XE 16.11.2 Cisco IOS XE 16.12.1 Cisco IOS XE 16.12.1S Cisco IOS XE 16.12.1T Cisco IOS XE 16.12.2S Cisco IOS XE 16.12.2T Cisco IOS XE 16.12.3 Cisco IOS XE 16.12.3S Cisco IOS XE 16.12.4 Cisco IOS XE 16.12.4A Cisco IOS XE 17.1.1 Cisco IOS XE 17.1.1S Cisco IOS XE 17.1.1T Cisco IOS XE 17.1.2 Cisco IOS XE 17.2.1 Cisco IOS XE 17.2.1A Cisco IOS XE 17.2.3 Cisco IOS XE 17.3.1	25
Hardware	Cisco Cisco Catalyst 9300 - Cisco Catalyst 9400 - Cisco Catalyst 9500 - Cisco Catalyst 9800 40 - Cisco Catalyst 9800 80 - Cisco Catalyst 9800 CL - Cisco Catalyst 9800 L -	7

Common Weakness Enumeration (CWE)

CWE-126 - Buffer Over-read

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-dos-2OA3JgKS