CyberSecBulletin
CVE-2023-2060NVD status: Modified

MELSEC iQ-R Series EtherNet/IP module RJ71EIP91: Weak Password Requirements

Published Updated By the CyberSecBulletin desk

CVE-2023-2060 is a high-severity weak password requirements vulnerability in MELSEC iQ-R Series EtherNet/IP module RJ71EIP91 from Mitsubishi Electric, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected MELSEC iQ-R Series EtherNet/IP module RJ71EIP91 versions: all versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.84% chance of exploitation within 30 days, higher than 58% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of MELSEC iQ-R Series EtherNet/IP module RJ71EIP91 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on mitsubishielectric.co.jp 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 iQ-R Series EtherNet/IP module RJ71EIP91all versionsNot stated
Mitsubishi ElectricMELSEC iQ-F Series EtherNet/IP module FX5-ENET/IPall versionsNot stated
Mitsubishi ElectricFx5-enet/ip FirmwareNot specified in the recordNot stated
Mitsubishi ElectricSw1dnn-eipct-bd FirmwareNot specified in the recordNot stated
Mitsubishi ElectricRj71eip91 FirmwareNot specified in the recordNot stated
Mitsubishi ElectricSw1dnn-eipctfx5-bd 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
HighAll data handled by the component can be read.
Integrity
NoneNothing can be modified.
Availability
NoneAvailability is not affected.

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

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

Official description

Weak Password Requirements vulnerability in FTP function on Mitsubishi Electric Corporation MELSEC iQ-R Series EtherNet/IP module RJ71EIP91 and MELSEC iQ-F Series EtherNet/IP module FX5-ENET/IP allows a remote unauthenticated attacker to access to the module via FTP by dictionary attack or password sniffing.

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

The underlying weakness: Weak Password Requirements

The product does not require that users should have strong passwords.

How developers prevent this class of flaw

  • Consider a second authentication factor beyond the password, which prevents the password from being a single point of failure. See CWE-308 for further information.
  • Consider implementing a password complexity meter to inform users when a chosen password meets the required attributes.

More Weak Password Requirements vulnerabilities (CWE-521)

Timeline

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

References

Third-party and government advisories

Other vulnerabilities in MELSEC iQ-R Series EtherNet/IP module RJ71EIP91

All MELSEC iQ-R Series EtherNet/IP module RJ71EIP91 vulnerabilities

Recent Weak Password Requirements vulnerabilities

Spotted an error? Tell us.