CVE-2020-6988 Information disclosure in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior
Remote attackers can exploit authentication flaws in Rockwell MicroLogix controllers to leak credentials and bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-6988?
CVE-2020-6988 is a high-severity vulnerability in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, published on 16 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, A remote, unauthenticated attacker can send a request from the RSLogix 500 software to the victim’s MicroLogix controller. The controller will then respond to the client with used password values to authenticate the user on the client-side. This method of authentication may allow an attacker to bypass authentication altogether, disclose sensitive information, or leak credentials.
Which versions are affected by CVE-2020-6988?
It affects 4 products.
Products include Rockwellautomation Micrologix 1100 Firmware, Rockwellautomation Micrologix 1400 a Firmware, Rockwellautomation Micrologix 1400 B Firmware, Rockwellautomation Rslogix 500.
How do I fix CVE-2020-6988?
No fix has been published for CVE-2020-6988 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-6988 being exploited?
There is no known exploitation of CVE-2020-6988 in the wild and no public exploit code.
Other vulnerabilities in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior
- CVE-2020-6984 Weak cryptography in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior
- CVE-2020-6990 Hardcoded credentials in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior
- CVE-2015-6490 Memory corruption in n/a
- CVE-2022-3166 MicroLogix 1100 & 1400 Product Web Server Application Vulnerable to Denial-Of-Service Condition Attack
- CVE-2021-33012 Denial of service in Rockwell Automation MicroLogix 1100
Sources
Also known as GHSA-8v4g-559x-qqxm.