Cisco IOS XE Software Interface Queue Wedge DoS (cisco-sa-quewedge-69BsHUBW)

high Nessus Plugin ID 154197

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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 in the layer 2 punt code that allows an unauthenticated, adjacent attacker to cause a queue wedge on an interface that receives specific Layer 2 frames, resulting in a denial of service (DoS) condition. This vulnerability is due to improper handling of certain Layer 2 frames. An attacker could exploit this vulnerability by sending specific Layer 2 frames on the segment the router is connected to. A successful exploit could allow the attacker to cause a queue wedge on the interface, resulting in a DoS condition. Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvw43399

Plugin Details

Severity: High

ID: 154197

File Name: cisco-sa-quewedge-69BsHUBW-iosxe.nasl

Version: 1.7

Type: combined

Family: CISCO

Published: 10/18/2021

Updated: 2/27/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.4

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

CVSS Score Source: CVE-2021-1621

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

Vector: CVSS:3.0/AV:A/AC:L/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: 9/22/2021

Vulnerability Publication Date: 9/22/2021

Reference Information

CVE: CVE-2021-1621

CWE: 399

CISCO-SA: cisco-sa-quewedge-69BsHUBW

IAVA: 2021-A-0441-S

CISCO-BUG-ID: CSCvw43399

Detections

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