#VU25990 Use of a broken or risky cryptographic algorithm in Rockwell Automation products - CVE-2020-6984

Vulnerability identifier: #VU25990

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-2020-6984

CWE-ID: CWE-327

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 gain unauthorized access to sensitive information on the system.

The vulnerability exists due to the cryptographic function utilized to protect the password in MicroLogix is discoverable. A remote attacker can gain access to sensitive project file information including passwords.

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.