Rockwell Automation/Allen-Bradley Multiple Devices Denial of Service

low Nessus Network Monitor Plugin ID 720096

Synopsis

An issue was discovered in Rockwell Automation Allen-Bradley controllers that would allow an attacker to remove all adminstrative users.

Description

An issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 controller 1763-L16AWA, Series A and B, Version 14.000 and prior versions; 1763-L16BBB, Series A and B, Version 14.000 and prior versions; 1763-L16BWA, Series A and B, Version 14.000 and prior versions; and 1763-L16DWD, Series A and B, Version 14.000 and prior versions. Because of an Incorrect Permission Assignment for Critical Resource, users with administrator privileges may be able to remove all administrative users requiring a factory reset to restore ancillary web server function. Exploitation of this vulnerability will still allow the affected device to function in its capacity as a controller.

Solution

Perform vendor recommended mitigations and apply available vendor upgrades.

Plugin Details

Severity: Low

ID: 720096

Family: SCADA

Published: 5/8/2019

Updated: 9/30/2019

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS v3

Risk Factor: Low

Base Score: 2.7

Temporal Score: 2.4

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

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

Vulnerability Information

Patch Publication Date: 1/5/2017

Vulnerability Publication Date: 1/5/2017

Reference Information

CVE: CVE-2016-9338

BID: 95302

Detections

Analytics