Mitsubishi Electric MELSEC iQ-R Series Safety CPU and SIL2 Process CPU Incorrect Privilege Assignment (CVE-2023-6815)

medium Tenable OT Security Plugin ID 502653

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Incorrect Privilege Assignment vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series Safety CPU R08/16/32/120SFCPU all versions and MELSEC iQ-R Series SIL2 Process CPU R08/16/32/120PSFCPU all versions allows a remote authenticated attacker who has logged into the product as a non-administrator user to disclose the credentials (user ID and password) of a user with a lower access level than the attacker by sending a specially crafted packet.

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Solution

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

When the affected products are used in the following combinations, an attack can be prevented by enabling "communicating with only the enhanced version of vulnerability management of GX Works3" when writing user information to the CPU module:

- MELSEC iQ-R Series Safety CPU versions 27 or later used with GX Works3 versions 1.087R or later.
- MELSEC iQ-R Series SIL2 Process CPU version 12 or later used with GX Works3 versions 1.105K or later.

Mitsubishi Electric recommends that users of MELSEC iQ-R Series Safety CPU (version 26 and prior) or MELSEC iQ-R Series SIL2 Process CPU (version 11 and prior) take the following mitigation measures to minimize the risk of exploiting this vulnerability because updating the product to the enhanced version of vulnerability management is not available:

- Use a firewall or virtual private network (VPN), etc., to prevent unauthorized access when Internet access is required.
- Use within a LAN and block access from untrusted networks and hosts through firewalls.
- Use IP filter function to block access from untrusted hosts. For details on the IP filter function, please refer to the following manual for each product. "1.13 Security" - "IP filter" in the MELSEC iQ-R Ethernet User's Manual(Application).
- Restrict physical access to the affected product as well as to the personal computers and the network devices that can communicate with it.
- Install antivirus software on your personal computer that can access the affected product.

For specific update instructions and additional details, see Mitsubishi Electric advisory 2023-021..

Plugin Details

Severity: Medium

ID: 502653

File Name: tenable_ot_mitsubishi_CVE-2023-6815.nasl

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 10/23/2024

Updated: 2/14/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-6815

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/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:mitsubishielectric:r08psfcpu_firmware, cpe:/o:mitsubishielectric:r08sfcpu_firmware, cpe:/o:mitsubishielectric:r16sfcpu_firmware, cpe:/o:mitsubishielectric:r16psfcpu_firmware, cpe:/o:mitsubishielectric:r120sfcpu_firmware, cpe:/o:mitsubishielectric:r120psfcpu_firmware, cpe:/o:mitsubishielectric:r32sfcpu_firmware, cpe:/o:mitsubishielectric:r32psfcpu_firmware

Required KB Items: Tenable.ot/Mitsubishi

Exploit Ease: No known exploits are available

Patch Publication Date: 2/13/2024

Vulnerability Publication Date: 2/13/2024

Reference Information

CVE: CVE-2023-6815

CWE: 266

ICSA: 24-044-01

Detections

Analytics