#VU25989 Use of Hard-coded Cryptographic Key in Rockwell Automation products - CVE-2020-6990

Vulnerability identifier: #VU25989

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-6990

CWE-ID: CWE-321

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MicroLogix 1400 Controllers Series A
Client/Desktop applications / Software for system administration
MicroLogix 1400 Controllers Series B
Client/Desktop applications / Software for system administration
Allen-Bradley MicroLogix 1100
Hardware solutions / Office equipment, IP-phones, print servers
RSLogix 500 Software
Client/Desktop applications / Other client software

Vendor: Rockwell Automation

Description
The vulnerability allows a remote attacker to disclose sensitive information on the target system.

The vulnerability exists due to the cryptographic key utilized to help protect the account password is hard coded into the RSLogix 500 binary file. A remote attacker can identify cryptographic keys.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MicroLogix 1400 Controllers Series A: All versions

MicroLogix 1400 Controllers Series B: 21.001

Allen-Bradley MicroLogix 1100: All versions

RSLogix 500 Software: before 11.00.00

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External links
https://ics-cert.us-cert.gov/advisories/icsa-20-070-06

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.