Detections
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Mitsubishi Electric MELSEC iQ-F FX5-OPC Denial of Service (CVE-2024-0727)

medium Tenable OT Security Plugin ID 502483

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A Denial-of-Service (DoS) vulnerability due to NULL Pointer Dereference when processing PKCS#12 format certificate exists in OpenSSL installed on MELSEC iQ-F OPC UA Unit. Because OpenSSL does not correctly check if a certain field in the PKCS#12 format certificate is NULL, a NULL pointer dereference occurs when the field is NULL, causing the product to enter a Denial-of-Service condition.

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

Solution

Mitsubishi Electric recommends that customers take the following mitigations to minimize the risk of exploiting this vulnerability:
 - Use within a LAN and block access from untrusted networks and hosts through firewalls.
 - Restrict physical access to the product, as well as to computers and network devices located within the same network as the product.
 - Use a firewall or virtual private network (VPN), etc. to prevent unauthorized access when Internet access is required.
 - Use IP filter function to block access from untrusted hosts. For details on the IP filter function, please refer to the following manual; MELSEC iQ-F FX5 OPC UA Module User's Manual '4.4 IP Filter'

See Also

http://www.nessus.org/u?1c875ffa

https://www.cisa.gov/news-events/ics-advisories/icsa-24-275-02

Plugin Details

Severity: Medium

ID: 502483

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 10/9/2024

Updated: 12/18/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS Score Source: CVE-2024-0727

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: cpe:/o:mitsubishielectric:melsec_iq-fx5-opc

Required KB Items: Tenable.ot/Mitsubishi

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/1/2024

Reference Information

CVE: CVE-2024-0727

CWE: 476

ICSA: 24-275-02