Cisco IOS XE & Cisco IOS XE SDWAN Ethernet Frame DoS (cisco-sa-le-drTOB625)

medium Nessus Plugin ID 141437
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco IOS XE or Cisco IOS XE SDWAN is affected by a denial of service (DoS) vulnerability in its networking component due to a failure to handle malformed ethernet frames. An unauthenticated, adjacent attacker can exploit this issue, by sending specially crafted ethernet frames to an affected device, to force a reload of the device.

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

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvu30597

See Also

http://www.nessus.org/u?218a376f

http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74268

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu30597

Plugin Details

Severity: Medium

ID: 141437

File Name: cisco-sa-le-drTOB625-iosxe.nasl

Version: 1.8

Type: local

Family: CISCO

Published: 10/14/2020

Updated: 3/29/2021

Dependencies: cisco_ios_xe_version.nasl

Risk Information

CVSS Score Source: CVE-2020-3465

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: AV:A/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/24/2020

Vulnerability Publication Date: 9/24/2020

Reference Information

CVE: CVE-2020-3465

CISCO-BUG-ID: CSCvu30597

CISCO-SA: cisco-sa-le-drTOB625

IAVA: 2020-A-0439

CWE: 20