CVE Vulnerabilities

CVE-2021-34768

Double Free

Published: Sep 23, 2021 | Modified: Nov 07, 2023
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
7.8 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C
RedHat/V2
RedHat/V3
Ubuntu

Multiple vulnerabilities in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to insufficient validation of CAPWAP packets. An attacker could exploit the vulnerabilities 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.

Weakness

The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.

Affected Software

Name Vendor Start Version End Version
Ios_xe Cisco 3.15.1xbs (including) 3.15.1xbs (including)
Ios_xe Cisco 3.15.2xbs (including) 3.15.2xbs (including)
Ios_xe Cisco 17.3.1 (including) 17.3.1 (including)
Ios_xe Cisco 17.3.2 (including) 17.3.2 (including)
Ios_xe Cisco 17.3.2a (including) 17.3.2a (including)
Ios_xe Cisco 17.4.1 (including) 17.4.1 (including)
Ios_xe Cisco 17.5.1 (including) 17.5.1 (including)

Potential Mitigations

References