Cisco IOS XE Software Arbitrary Code Execution Vulnerability (cisco-sa-xbace-OnCEbyS)

medium Nessus Plugin ID 141119

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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 arbitrary code execution vulnerability, due to incorrect validations by boot scripts when specific ROM monitor (ROMMON) variables are set. An authenticated, local attacker could exploit this vulnerability by installing code to a specific directory in the underlying operating system (OS) and setting a specific ROMMON variable. A successful exploit could allow the attacker to execute persistent code on the underlying OS. To exploit this vulnerability, the attacker would need access to the root shell on the device or have physical access to the device.

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 CSCvs58715

Plugin Details

Severity: Medium

ID: 141119

File Name: cisco-sa-xbace-OnCEbyS-iosxe.nasl

Version: 1.9

Type: local

Family: CISCO

Published: 10/2/2020

Updated: 9/28/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2020-3417

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 5.8

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/24/2020

Vulnerability Publication Date: 9/24/2020

Reference Information

CVE: CVE-2020-3417

CWE: 78

CISCO-SA: cisco-sa-xbace-OnCEbyS

IAVA: 2020-A-0439-S

CISCO-BUG-ID: CSCvs58715

Detections

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