Cisco IOS Software for Catalyst 2960-L Series Switches and Catalyst CDB-8P Switches 802.1X Authentication Bypass Vulnerability (cisco-sa-c2960L-DpWA9Re4)

medium Nessus Plugin ID 137840

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

An authentication bypass vulnerability exists in Cisco IOS Software for Catalyst 2960-L Series Switches and Catalyst CDB-8P Switches due to broadcast traffic that is received on the 802.1X-enabled port being mishandled. An unauthenticated, remote attacker can exploit this by sending broadcast traffic on the port before being authenticated. A successful exploit could allow the attacker to send and receive broadcast traffic on the 802.1X-enabled port before authentication.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvo57950

Plugin Details

Severity: Medium

ID: 137840

File Name: cisco-sa-c2960L-DpWA9Re4-ios.nasl

Version: 1.14

Type: combined

Family: CISCO

Published: 6/26/2020

Updated: 4/27/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Low

Base Score: 2.9

Temporal Score: 2.1

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

CVSS Score Source: CVE-2020-3231

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

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

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

Vulnerability Information

CPE: cpe:/o:cisco:ios

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/3/2020

Vulnerability Publication Date: 6/3/2020

Reference Information

CVE: CVE-2020-3231

CWE: 284

CISCO-SA: cisco-sa-c2960L-DpWA9Re4

IAVA: 2020-A-0275-S

CISCO-BUG-ID: CSCvo57950

Detections

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