Rockwell Automation MicroLogix 1100/MicroLogix 1400/RSLogix 500 hard-coded key

Summaryinfo

A vulnerability was found in Rockwell Automation MicroLogix 1100, MicroLogix 1400 and RSLogix 500. It has been classified as critical. Affected by this vulnerability is an unknown functionality. This manipulation causes hard-coded key. This vulnerability appears as CVE-2020-6990. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Rockwell Automation MicroLogix 1100, MicroLogix 1400 and RSLogix 500 (Automation Software) (unknown version). Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a hard-coded key vulnerability. The CWE definition for the vulnerability is CWE-321. The use of a hard-coded cryptographic key significantly increases the possibility that encrypted data may be recovered. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented 03/16/2020. This vulnerability is known as CVE-2020-6990 since 01/14/2020. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-151722, VDB-151721 and VDB-151720 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Automation Software

Vendor

• Rockwell Automation

Name

• MicroLogix 1100
• MicroLogix 1400
• RSLogix 500

License

• commercial

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