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Cisco IOS XE Software for ASR 900 Series Route Switch Processor 3 Arbitrary Code Execution (cisco-sa-iosxe-rsp3-rce-jVHg8Z7c)

medium Nessus Plugin ID 141371

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, IOS-XE for Cisco ASR 900 Series Aggregation Services Routers is affected by multiple vulnerabilities due to incorrect validations by boot scripts when specific ROM monitor (ROMMON) variables are set.

An authenticated, local attacker with high privileges to execute persistent code at bootup could exploit this by copying a specific file to the local file system of an affected device and defining specific ROMMON variables. A successful exploit could allow the attacker to run arbitrary code on the underlying operating system (OS) with root privileges. To exploit these vulnerabilities, an attacker would need to have 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 IDs CSCvr69196, CSCvs62410

See Also

http://www.nessus.org/u?7666b559

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

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr69196

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvs62410

Plugin Details

Severity: Medium

ID: 141371

File Name: cisco-sa-iosxe-rsp3-rce-jVHg8Z7c-iosxe.nasl

Version: 1.11

Type: local

Family: CISCO

Published: 10/12/2020

Updated: 2/15/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

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

CVSS Score Source: CVE-2020-3513

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, Host/Cisco/IOS-XE/Model

Exploit Ease: No known exploits are available

Patch Publication Date: 9/24/2020

Vulnerability Publication Date: 9/24/2020

Reference Information

CVE: CVE-2020-3416, CVE-2020-3513

CWE: 749

CISCO-SA: cisco-sa-iosxe-rsp3-rce-jVHg8Z7c

IAVA: 2020-A-0439-S

CISCO-BUG-ID: CSCvr69196, CSCvs62410