CVE-2023-1618

Authentication Bypass Vulnerability in MELSEC WS Series Ethernet Interface Module

Severity Score

8.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

Active Debug Code vulnerability in Mitsubishi Electric Corporation MELSEC WS Series WS0-GETH00200 Serial number 2310 **** and prior allows a remote unauthenticated attacker to bypass authentication and illegally log into the affected module by connecting to it via telnet which is hidden function and is enabled by default when shipped from the factory. As a result, a remote attacker with unauthorized login can reset the module, and if certain conditions are met, he/she can disclose or tamper with the module's configuration or rewrite the firmware.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Complete

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2023-03-24 CVE Reserved
2023-05-19 CVE Published
2025-02-12 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-489: Active Debug Code
CWE-1188: Initialization of a Resource with an Insecure Default

CAPEC

References (3)

URL	Tag	Source
https://jvn.jp/vu/JVNVU96063959	Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-23-138-02	Mitigation

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-002_en.pdf	2023-08-23

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mitsubishielectric Search vendor "Mitsubishielectric"	Melsec Ws0-geth00200 Firmware Search vendor "Mitsubishielectric" for product "Melsec Ws0-geth00200 Firmware"	*	-	Affected	in	Mitsubishielectric Search vendor "Mitsubishielectric"	Melsec Ws0-geth00200 Search vendor "Mitsubishielectric" for product "Melsec Ws0-geth00200"	-	-	Safe