Cisco IOS XR Software Command Injection (cisco-sa-xr-cmdinj-vsKGherc)

high Nessus Plugin ID 148448
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 XR Software is affected by a command injection vulnerability.
A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to inject arbitrary commands that are executed with root privileges on the underlying Linux operating system (OS) of an affected device.
This vulnerability is due to insufficient input validation of commands that are supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to an affected command. A successful exploit could allow the attacker to execute commands on the underlying Linux OS with root privileges.

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 CSCvu63474

See Also

http://www.nessus.org/u?a31be3cb

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu63474

Plugin Details

Severity: High

ID: 148448

File Name: cisco-sa-xr-cmdinj-vsKGherc-iosxr.nasl

Version: 1.9

Type: combined

Family: CISCO

Published: 4/13/2021

Updated: 9/10/2021

Dependencies: cisco_ios_xr_version.nasl

Risk Information

CVSS Score Source: CVE-2021-1485

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

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

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: cpe:/o:cisco:ios_xr

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/7/2021

Vulnerability Publication Date: 4/7/2021

Reference Information

CVE: CVE-2021-1485

CISCO-BUG-ID: CSCvu63474

CISCO-SA: cisco-sa-xr-cmdinj-vsKGherc

IAVA: 2021-A-0158-S

CWE: 88