Detections
Analytics
Cisco IOS XE Software IOx Guest Shell USB SSD Namespace Protection Privilege Escalation (cisco-sa-iox-usb-guestshell-WmevScDj)
high Nessus Plugin ID 143490
Language:
Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, IOS-XE is affected by a privilege escalation vulnerability due to a vulnerability in the file system on the pluggable USB 3.0 Solid State Drive (SSD). An attacker could exploit this vulnerability by removing the USB 3.0 SSD, modifying or deleting files on the USB 3.0 SSD by using another device, and then reinserting the USB 3.0 SSD on the original device. A successful exploit could allow the attacker to remove container protections and perform file actions outside the namespace of the container with root privileges.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 CSCvr50406See Also
Plugin Details
Severity: High
ID: 143490
File Name: cisco-sa-iox-usb-guestshell-WmevScDj-iosxe.nasl
Version: 1.8
Type: combined
Family: CISCO
Published: 12/7/2020
Updated: 9/28/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.3
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-2020-3396
CVSS v3
Risk Factor: High
Base Score: 7.2
Temporal Score: 6.3
Vector: CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:C/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-2020-3396