Cisco IOS XR Software Authenticated User Privilege Escalation (cisco-sa-iosxr-LJtNFjeN)

High Nessus Plugin ID 140793

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VPR Score: 5.9

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 privilege escalation vulnerability in task group assignment for a specific CLI command due to incorrect mapping to task groups. An attacker could exploit this vulnerability by first authenticating to the local CLI shell on the device and using the CLI command to bypass the task group–based checks. A successful exploit could allow the attacker to elevate privileges and gain full administrative control of the device. There are workarounds that address this vulnerability.

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

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvs12604

See Also

http://www.nessus.org/u?9d85a259

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvs12604

Plugin Details

Severity: High

ID: 140793

File Name: cisco-sa-iosxr-LJtNFjeN.nasl

Version: 1.4

Type: local

Family: CISCO

Published: 2020/09/25

Updated: 2020/09/28

Dependencies: 71430, 133723

Configuration: Enable paranoid mode

Risk Information

Risk Factor: High

VPR Score: 5.9

CVSS Score Source: CVE-2020-3473

CVSS v2.0

Base Score: 7.2

Temporal Score: 5.3

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

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: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xr

Required KB Items: Host/Cisco/IOS-XR/Version, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/09/02

Vulnerability Publication Date: 2020/09/02

Reference Information

CVE: CVE-2020-3473

CISCO-BUG-ID: CSCvs12604

CISCO-SA: cisco-sa-iosxr-LJtNFjeN

IAVA: 2020-A-0374

CWE: 264