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CVE-2020-6990

CRITICALCVSS 9.8/10EPSS 4.23%

Last modified

CVE-2020-6990 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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, The cryptographic key utilized to help protect the account password is hard coded into the RSLogix 500 binary file. An attacker could identify cryptographic keys and use it for further cryptographic attacks that could ultimately lead to a remote attacker gaining unauthorized access to the controller.. EPSS estimates a 4.23% chance of exploitation in the next 30 days.

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, The cryptographic key utilized to help protect the account password is hard coded into the RSLogix 500 binary file. An attacker could identify cryptographic keys and use it for further cryptographic attacks that could ultimately lead to a remote attacker gaining unauthorized access to the controller.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
4.23%

89.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
RockwellautomationMicrologix 1400 A FirmwareAll versions
RockwellautomationMicrologix 1400 B Firmware<= 21.001
RockwellautomationMicrologix 1100 FirmwareAll versions
RockwellautomationRslogix 500<= 12.001

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-6990?
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, The cryptographic key utilized to help protect the account password is hard coded into the RSLogix 500 binary file. An attacker could identify cryptographic keys and use it for further cryptographic attacks that could ultimately lead to a remote attacker gaining unauthorized access to the controller.
How severe is CVE-2020-6990?
CVE-2020-6990 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.23% probability of exploitation in the next 30 days.
How do I fix CVE-2020-6990?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-6990?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST