CyberSecBulletin
CVE-2023-1618NVD status: Modified

MELSEC WS Series WS0-GETH00200: Initialization of a Resource with an Insecure Default

Published Updated By the CyberSecBulletin desk

CVE-2023-1618 is a high-severity initialization of a resource with an insecure default vulnerability in MELSEC WS Series WS0-GETH00200 from Mitsubishi Electric, with a CVSS 3.1 base score of 8.6 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected MELSEC WS Series WS0-GETH00200 versions: Serial number 2310 **** and prior. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.13% chance of exploitation within 30 days, higher than 67% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of MELSEC WS Series WS0-GETH00200 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on mitsubishielectric.com for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
Mitsubishi ElectricMELSEC WS Series WS0-GETH00200Serial number 2310 **** and priorNot stated
Mitsubishi ElectricMelsec Ws0-geth00200 FirmwareNot specified in the recordNot stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
LowSome restricted data can be read.
Integrity
HighData or code can be modified at will.
Availability
LowPerformance or availability is reduced.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighCNA (yd.MitsubishiElectric.co.jp)
CVSS 3.18.6HighNVD

Official description

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.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Initialization of a Resource with an Insecure Default

The product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.

More Initialization of a Resource with an Insecure Default vulnerabilities (CWE-1188)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Patches and release notes

Third-party and government advisories

Other vulnerabilities in MELSEC WS Series WS0-GETH00200

All MELSEC WS Series WS0-GETH00200 vulnerabilities

Recent Initialization of a Resource with an Insecure Default vulnerabilities

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