Rockwell Automation Logix Controllers Uncontrolled Resource Consumption (CVE-2022-1797)

high Tenable OT Security Plugin ID 500653


The remote OT asset is affected by a vulnerability.


The remote OT product is vulnerable as specified in advisory ICSA-22-144-01.

- A malformed Class 3 common industrial protocol message with a cached connection can cause a denial-of- service condition in Rockwell Automation Logix Controllers, resulting in a major nonrecoverable fault. If the target device becomes unavailable, a user would have to clear the fault and redownload the user project file to bring the device back online. (CVE-2022-1797)

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The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at

Rockwell Automation recommends users update to the latest firmware version to mitigate this vulnerability. Users are directed towards the risk mitigation provided below and are encouraged (where possible) to combine these with the general security guidelines below to employ multiple strategies simultaneously. Users should go to Rockwell Automation's Product Compatibility & Download Center to download the latest firmware.

- CompactLogix 5380, Compact GuardLogix 5380, CompactLogix 5480, ControlLogix 5580, GuardLogix 5580: Upgrade to v33.011 firmware
- CompactLogix 5370, Compact GuardLogix 5370, ControlLogix 5570, GuardLogix 5570: Upgrade to v34.011 firmware

If upgrading is not possible, Rockwell Automation recommends the following mitigations:

- Use of Microsoft AppLocker or other similar allow list applications can help mitigate risk. Information on using AppLocker with products from Rockwell Automation is available in Knowledgebase article QA17329.
- Confirm the least-privilege user principle is followed, and user/service account access to shared resources (such as a database) is only granted with a minimum number of rights as needed.

Rockwell Automation general security guidelines:

- Use trusted software, software patches, antivirus/antimalware programs and interact only with trusted websites and attachments.
- Minimize network exposure for all control system devices and/or systems and confirm they are not accessible from the Internet. For further information about the risks of unprotected Internet accessible control systems, see Knowledgebase article PN715.
- Locate control system networks and devices behind firewalls and isolate them from the business network.
- When remote access is required, use secure methods, such as virtual private networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize a VPN is only as secure as connected devices.
- Please see Rockwell Automation’s security advisory PN1596 for more information.

See Also

Plugin Details

Severity: High

ID: 500653

Version: 1.8

Type: remote

Family: Tenable.ot

Published: 6/11/2022

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2022-1797


Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:rockwellautomation:compact_guardlogix_5370_firmware, cpe:/o:rockwellautomation:compact_guardlogix_5380_firmware, cpe:/o:rockwellautomation:compactlogix_5370_firmware, cpe:/o:rockwellautomation:compactlogix_5380_firmware, cpe:/o:rockwellautomation:compactlogix_5480_firmware, cpe:/o:rockwellautomation:controllogix_5570_firmware, cpe:/o:rockwellautomation:controllogix_5580_firmware, cpe:/o:rockwellautomation:guardlogix_5570_firmware, cpe:/o:rockwellautomation:guardlogix_5580_firmware

Required KB Items: Tenable.ot/Rockwell

Exploit Ease: No known exploits are available

Patch Publication Date: 6/2/2022

Vulnerability Publication Date: 6/2/2022

Reference Information

CVE: CVE-2022-1797

CWE: 400