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Cisco IOS XE Software for Wireless LAN Controllers CAPWAP Join DoS (cisco-sa-c9800-apjoin-dos-nXRHkt5)

medium Nessus Plugin ID 173249

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco IOS-XE Software is affected by a vulnerability.

 - A vulnerability in the access point (AP) joining process of the Control and Provisioning of Wireless Access Points (CAPWAP) protocol of Cisco IOS XE Software for Wireless LAN Controllers (WLCs) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
 This vulnerability is due to a logic error that occurs when certain conditions are met during the AP joining process. An attacker could exploit this vulnerability by adding an AP that is under their control to the network. The attacker then must ensure that the AP successfully joins an affected wireless controller under certain conditions. Additionally, the attacker would need the ability to restart a valid AP that was previously connected to the controller. A successful exploit could allow the attacker to cause the affected device to restart unexpectedly, resulting in a DoS condition. (CVE-2023-20100)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwc17898

See Also

http://www.nessus.org/u?5ac2eac9

http://www.nessus.org/u?86953f38

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwc17898

Plugin Details

Severity: Medium

ID: 173249

File Name: cisco-sa-c9800-apjoin-dos-nXRHkt5-iosxe.nasl

Version: 1.2

Type: combined

Family: CISCO

Published: 3/22/2023

Updated: 4/4/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2023-20100

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version, Host/Cisco/IOS-XE/Model

Exploit Ease: No known exploits are available

Patch Publication Date: 3/22/2023

Vulnerability Publication Date: 3/22/2023

Reference Information

CVE: CVE-2023-20100

CISCO-SA: cisco-sa-c9800-apjoin-dos-nXRHkt5

IAVA: 2023-A-0157

CISCO-BUG-ID: CSCwc17898