Cisco IOS XR Authenticated User Privilege Escalation (cisco-sa-iosxr-cli-privescl-sDVEmhqv)

Medium Nessus Plugin ID 140799

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VPR Score: 6.3

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 of task groups assignments. An authenticated, local attacker with read permissions could exploit this vulnerability by issuing a specific command that should required administrative privileges. A successful exploit could allow the attacker to invalidate the integrity of the disk and cause the device to restart. There are workarounds that address this vulnerability.

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 CSCvu79978, CSCvu99038, CSCvv05925

See Also

http://www.nessus.org/u?4dec7487

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu79978

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu99038

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv05925

Plugin Details

Severity: Medium

ID: 140799

File Name: cisco-sa-iosxr-cli-privescl-sDVEmhqv.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 2020/09/25

Updated: 2020/11/13

Dependencies: 133723, 71430

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 6.3

CVSS Score Source: CVE-2020-3530

CVSS v2.0

Base Score: 5.6

Temporal Score: 4.1

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

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

CVSS v3.0

Base Score: 8.4

Temporal Score: 7.3

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/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-2020-3530

CISCO-BUG-ID: CSCvu79978, CSCvu99038, CSCvv05925

CISCO-SA: cisco-sa-iosxr-cli-privescl-sDVEmhqv

IAVA: 2020-A-0374

CWE: 264