Auth bypass in Rockwellautomation Micrologix 1100
CVE-2020-6988
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.
EPSS: 0.040 (89.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Rockwellautomation Micrologix_1100
- Rockwellautomation Micrologix_1100_firmware
- Rockwellautomation Micrologix_1400
- Rockwellautomation Micrologix_1400_a_firmware
- Rockwellautomation Micrologix_1400_b_firmware
- Rockwellautomation Rslogix_500
- N/a Rockwell Automation Micrologix 1400 Controllers Series B V21.001 And Prior, A, All Versions, 1100 Controller, Rslogix 500 Software V12.001 Prior — versions 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
Weakness classification (CWE)
References
- ics-cert@hq.dhs.gov (US Government Resource, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-6988?
- CVE-2020-6988 is a high-severity vulnerability in Rockwellautomation Micrologix 1100, classified under CWE-603. CVSS score: 7.5/10. Published 2020-03-16.
- How severe is CVE-2020-6988?
- High severity. CVSS v3 base score is 7.5 out of 10.