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Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst Access Points Privilege Escalation (cisco-sa-ewc-priv-esc-nderYLtK)

medium Nessus Plugin ID 165530

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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 vulnerability.

 - A vulnerability in the self-healing functionality of Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst Access Points could allow an authenticated, local attacker to escape the restricted controller shell and execute arbitrary commands on the underlying operating system of the access point. This vulnerability is due to improper checks throughout the restart of certain system processes. An attacker could exploit this vulnerability by logging on to an affected device and executing certain CLI commands. A successful exploit could allow the attacker to execute arbitrary commands on the underlying OS as root. To successfully exploit this vulnerability, an attacker would need valid credentials for a privilege level 15 user of the wireless controller. (CVE-2022-20855)

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 CSCwa23357

See Also

http://www.nessus.org/u?26925ed0

https://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74745

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa23357

Plugin Details

Severity: Medium

ID: 165530

File Name: cisco-sa-ewc-priv-esc-nderYLtK-iosxe.nasl

Version: 1.12

Type: combined

Family: CISCO

Published: 9/29/2022

Updated: 3/21/2023

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

CVSS Score Source: CVE-2022-20855

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, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2022

Vulnerability Publication Date: 9/28/2022

Reference Information

CVE: CVE-2022-20855

CWE: 266

CISCO-SA: cisco-sa-ewc-priv-esc-nderYLtK

IAVA: 2022-A-0390

CISCO-BUG-ID: CSCwa23357