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Hitachi Energy RTU500 Series Improper Validation of Specified Index, Position, or Offset in Input (CVE-2023-5768)

medium Tenable OT Security Plugin ID 501846

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability exists in the HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Incomplete or wrong received APDU frame layout may cause blocking on link layer. Error reason was an endless blocking when reading incoming frames on link layer with wrong length information of APDU or delayed reception of data octets. Only communication link of affected HCI IEC 60870-5-104 is blocked. If attack sequence stops the communication to the previously attacked link gets normal again.

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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.

Hitachi Energy recommend users take the following actions as well as following general mitigation measures:

- RTU500 series Versions 12.0.1 - 12.0.14: Update to CMU Firmware Version 12.0.15
- RTU500 series Versions 12.2.1 - 12.2.11: Update to CMU Firmware Version 12.2.12
- RTU500 series Versions 12.4.1 - 12.4.11: Update to CMU Firmware Version 12.4.12
- RTU500 series Versions 12.6.1 - 12.6.9: Update to CMU Firmware Version 12.6.10
- RTU500 series Versions 12.7.1 - 12.7.6: Update to CMU Firmware Version 12.7.7
- RTU500 series Versions 13.2.1 - 13.2.6: Update to CMU Firmware Version 13.2.7
- RTU500 series Versions 13.4.1 - 13.4.3: Update to CMU Firmware Version 13.4.4 or 13.5.1

For more information see the associated Hitachi Energy PSIRT security advisory.

See Also

http://www.nessus.org/u?e97b4773

https://www.cisa.gov/news-events/ics-advisories/icsa-25-128-02

Plugin Details

Severity: Medium

ID: 501846

File Name: tenable_ot_abb_CVE-2023-5768.nasl

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 12/21/2023

Updated: 2/14/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.0

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2023-5768

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

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

Vulnerability Information

CPE: cpe:/o:hitachienergy:rtu520_firmware:12, cpe:/o:hitachienergy:rtu520_firmware:13

Required KB Items: Tenable.ot/ABB

Exploit Ease: No known exploits are available

Patch Publication Date: 12/4/2023

Vulnerability Publication Date: 12/4/2023

Reference Information

CVE: CVE-2023-5768

CWE: 79