CVE-2021-22681 — CRITICAL (9.8)

Vulnerability Description

Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800. Rockwell Automation Studio 5000 Logix Designer Versions 21 and later and RSLogix 5000: Versions 16 through 20 are vulnerable because an unauthenticated attacker could bypass this verification mechanism and authenticate with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800.

CVSS Score

9.8

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Rockwellautomation	Factorytalk Services Platform	>= 2.10
Rockwellautomation	Rslogix 5000	>= 16, <= 20
Rockwellautomation	Studio 5000 Logix Designer	>= 21.0
Rockwellautomation	Compact Guardlogix 5370	-
Rockwellautomation	Compact Guardlogix 5380	-
Rockwellautomation	Compactlogix 1768	-
Rockwellautomation	Compactlogix 1769	-
Rockwellautomation	Compactlogix 5370	-
Rockwellautomation	Compactlogix 5380	-
Rockwellautomation	Compactlogix 5480	-
Rockwellautomation	Controllogix 5550	-
Rockwellautomation	Controllogix 5560	-
Rockwellautomation	Controllogix 5570	-
Rockwellautomation	Controllogix 5580	-
Rockwellautomation	Drivelogix 1794-L34	-
Rockwellautomation	Drivelogix 5560	-
Rockwellautomation	Drivelogix 5730	-
Rockwellautomation	Guardlogix 5570	-
Rockwellautomation	Guardlogix 5580	-
Rockwellautomation	Softlogix 5800	-

Related Weaknesses (CWE)

CWE-522

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-056-03Third Party AdvisoryUS Government Resource
https://us-cert.cisa.gov/ics/advisories/icsa-21-056-03Third Party AdvisoryUS Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-US Government Resource

FAQ

What is CVE-2021-22681?

CVE-2021-22681 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell Automation CompactLo...

How severe is CVE-2021-22681?

CVE-2021-22681 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-22681?

Check the references section above for vendor advisories and patch information. Affected products include: Rockwellautomation Factorytalk Services Platform, Rockwellautomation Rslogix 5000, Rockwellautomation Studio 5000 Logix Designer, Rockwellautomation Compact Guardlogix 5370, Rockwellautomation Compact Guardlogix 5380.