Omron CS/CJ Series Missing Authentication For Critical Function (CVE-2022-45794)

high Tenable OT Security Plugin ID 501948

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Omron CS/CJ series programmable logic controllers are missing authentication for the file system. This could allow an attacker to access the file system (via memory card or EM file memory) and obtain all available sensitive information.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

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

OMRON recommends users take the following mitigation measures to minimize the risk of exploitation of these vulnerabilities.

- Enable the FINS write protection function.
- Minimize connection of control systems and equipment to open networks preventing untrusted devices from accessing them.
- Implement firewalls:
- Shut down unused communications ports
- Limit communications hosts
- Limit access to FINS port (9600)
- Isolate control systems and equipment from the IT network.
- Use a virtual private network (VPN) for remote access to control systems and equipment.
- Use strong passwords and change them frequently.
- Install physical controls, only permitting authorized personnel access to control systems and equipment.
- Use malware scanning tools to ensure safety of any USB drives or other portable devices before connecting them to control systems and devices.
- Enforce multifactor authentication on all devices with remote access to control systems and equipment when possible.
- Protect hosts with access to the control system against malware and Ensure installation and maintenance of up-to-date, antivirus software on hosts with access to control systems.
- Complete validation processing, such as backup and range checks, to cope with unintentional modification of input/output data to control systems and devices.
- Complete periodical data backup and maintenance to prepare for data loss.

For more information, see Omron’s Advisory.

Plugin Details

Severity: High

ID: 501948

Version: 1.3

Type: remote

Family: Tenable.ot

Published: 1/31/2024

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2022-45794

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:omron:sysmac_cj2h-cpu68-eip_firmware, cpe:/o:omron:sysmac_cj2m-cpu34_firmware, cpe:/o:omron:sysmac_cj2m-cpu11_firmware, cpe:/o:omron:sysmac_cj2m-cpu15_firmware, cpe:/o:omron:sysmac_cj2m-cpu33_firmware, cpe:/o:omron:sysmac_cj2h-cpu66-eip_firmware, cpe:/o:omron:sysmac_cj2h-cpu67_firmware, cpe:/o:omron:sysmac_cj2h-cpu64-eip_firmware, cpe:/o:omron:sysmac_cj2h-cpu64_firmware, cpe:/o:omron:sysmac_cj2h-cpu68_firmware, cpe:/o:omron:sysmac_cj2m-cpu31_firmware, cpe:/o:omron:sysmac_cj2h-cpu65-eip_firmware, cpe:/o:omron:sysmac_cj2h-cpu65_firmware, cpe:/o:omron:sysmac_cj2h-cpu66_firmware, cpe:/o:omron:sysmac_cj2m-cpu14_firmware, cpe:/o:omron:sysmac_cj2m-cpu35_firmware, cpe:/o:omron:sysmac_cj2m-cpu12_firmware, cpe:/o:omron:sysmac_cj2h-cpu67-eip_firmware, cpe:/o:omron:sysmac_cj2m-cpu13_firmware, cpe:/o:omron:sysmac_cj2m-cpu32_firmware

Required KB Items: Tenable.ot/Omron

Exploit Ease: No known exploits are available

Patch Publication Date: 1/10/2024

Vulnerability Publication Date: 1/10/2024

Reference Information

CVE: CVE-2022-45794

CWE: 306

Detections

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