Cisco Wireless LAN Controller 802.11 Generic Advertisement Service Denial of Service Vulnerability (cisco-sa-wlc-gas-dos-8FsE3AWH)

high Nessus Plugin ID 135858

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

A denial of service (DoS) vulnerability exists in the 802.11 Generic Advertisement Service (GAS) frame processing function of Cisco Wireless LAN Controller (WLC) Software due to incomplete input validation of the 802.11 GAS frames that are processed by an affected device. An unauthenticated, remote attacker can exploit this issue by sending a crafted 802.11 GAS frame over the air to an access point (AP), and that frame would then be relayed to the affected WLC. Also, an attacker with Layer 3 connectivity to the WLC could exploit this vulnerability by sending a malicious 802.11 GAS payload in a Control and Provisioning of Wireless Access Points (CAPWAP) packet to the device. The described attacks would cause the device to reload resulting in a Denial of Service.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvr52059

Plugin Details

Severity: High

ID: 135858

File Name: cisco-sa-wlc-gas-dos-8FsE3AWH.nasl

Version: 1.13

Type: local

Family: CISCO

Published: 4/21/2020

Updated: 9/28/2023

Supported Sensors: Nessus

Risk Information

CVSS Score Rationale: Based on vendor advisory

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-3273

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

Required KB Items: Host/Cisco/WLC/Version, Host/Cisco/WLC/Port

Exploit Ease: No known exploits are available

Patch Publication Date: 4/15/2020

Vulnerability Publication Date: 4/15/2020

Reference Information

CVE: CVE-2020-3273

CWE: 119

CISCO-SA: cisco-sa-wlc-gas-dos-8FsE3AWH

IAVA: 2019-A-0424-S

CISCO-BUG-ID: CSCvr52059

Detections

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