CVE-2016-9338 Privilege escalation in Rockwell Automation MicroLogix 1100 and 1400

Low 2.7 Published 13 Feb 2017 Updated 6 Aug 2024

Administrators can remove all admin users, requiring a factory reset to restore web server functions, impacting availability of the controller's interface.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2016-9338?

CVE-2016-9338 is a low-severity vulnerability in Rockwell Automation MicroLogix 1100 and 1400, published on 13 Feb 2017. An attacker needs administrator access to exploit it, with no action from the victim.

Official 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.

Which versions are affected by CVE-2016-9338?

It affects 20 products.

Products include Rockwellautomation 1763-L16awa Series A, Rockwellautomation 1763-L16awa Series B, Rockwellautomation 1763-L16bbb Series A, Rockwellautomation 1763-L16bbb Series B, Rockwellautomation 1763-L16bwa Series A, Rockwellautomation 1763-L16bwa Series B and 14 more.

How do I fix CVE-2016-9338?

No fix has been published for CVE-2016-9338 yet. Limit exposure of the affected software until one is available.

Is CVE-2016-9338 being exploited?

There is no known exploitation of CVE-2016-9338 in the wild and no public exploit code.

Sources

Also known as GHSA-6cm5-532j-c584.