CVE Vulnerabilities

CVE-2021-20588

Improper Handling of Length Parameter Inconsistency

Published: Feb 19, 2021 | Modified: Jun 13, 2025
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric FA Engineering Software (CPU Module Logging Configuration Tool versions 1.112R and prior, CW Configurator versions 1.011M and prior, Data Transfer versions 3.44W and prior, EZSocket versions 5.4 and prior, FR Configurator all versions, FR Configurator SW3 all versions, FR Configurator2 versions 1.24A and prior, GT Designer3 Version1(GOT1000) versions 1.250L and prior, GT Designer3 Version1(GOT2000) versions 1.250L and prior, GT SoftGOT1000 Version3 versions 3.245F and prior, GT SoftGOT2000 Version1 versions 1.250L and prior, GX Configurator-DP versions 7.14Q and prior, GX Configurator-QP all versions, GX Developer versions 8.506C and prior, GX Explorer all versions, GX IEC Developer all versions, GX LogViewer versions 1.115U and prior, GX RemoteService-I all versions, GX Works2 versions 1.597X and prior, GX Works3 versions 1.070Y and prior, iQ Monozukuri ANDON (Data Transfer) versions 1.003D and prior, iQ Monozukuri Process Remote Monitoring (Data Transfer) versions 1.002C and prior, M_CommDTM-HART all versions, M_CommDTM-IO-Link versions 1.03D and prior, MELFA-Works versions 4.4 and prior, MELSEC WinCPU Setting Utility all versions, MELSOFT EM Software Development Kit (EM Configurator) versions 1.015R and prior, MELSOFT Navigator versions 2.74C and prior, MH11 SettingTool Version2 versions 2.004E and prior, MI Configurator versions 1.004E and prior, MT Works2 versions 1.167Z and prior, MX Component versions 5.001B and prior, Network Interface Board CC IE Control utility versions 1.29F and prior, Network Interface Board CC IE Field Utility versions 1.16S and prior, Network Interface Board CC-Link Ver.2 Utility versions 1.23Z and prior, Network Interface Board MNETH utility versions 34L and prior, PX Developer versions 1.53F and prior, RT ToolBox2 versions 3.73B and prior, RT ToolBox3 versions 1.82L and prior, Setting/monitoring tools for the C Controller module (SW4PVC-CCPU) versions 4.12N and prior, and SLMP Data Collector versions 1.04E and prior) allows a remote unauthenticated attacker to cause a DoS condition on the software products, and possibly to execute a malicious code on the personal computer running the software products although it has not been reproduced, by spoofing MELSEC, GOT or FREQROL and returning crafted reply packets.

Weakness

The product parses a formatted message or structure, but it does not handle or incorrectly handles a length field that is inconsistent with the actual length of the associated data.

Affected Software

Name Vendor Start Version End Version
C_controller_module_setting_and_monitoring_tool Mitsubishielectric * *
Cpu_module_logging_configuration_tool Mitsubishielectric * 1.112r (including)
Cw_configurator Mitsubishielectric * 1.011m (including)
Data_transfer Mitsubishielectric * 3.44w (including)
Ezsocket Mitsubishielectric * *
Fr_configurator Mitsubishielectric * *
Fr_configurator_sw3 Mitsubishielectric * *
Fr_configurator2 Mitsubishielectric * 1.24a (including)
Gt_designer3 Mitsubishielectric * 1.250l (including)
Gt_softgot1000 Mitsubishielectric * 3.245f (including)
Gt_softgot2000 Mitsubishielectric * 1.250l (including)
Gx_configurator-dp Mitsubishielectric * 7.14q (including)
Gx_configurator-qp Mitsubishielectric * *
Gx_developer Mitsubishielectric * 8.506c (including)
Gx_explorer Mitsubishielectric * *
Gx_iec_developer Mitsubishielectric * *
Gx_logviewer Mitsubishielectric * 1.115u (including)
Gx_remoteservice-i Mitsubishielectric * *
Gx_works2 Mitsubishielectric * 1.597x (including)
Gx_works3 Mitsubishielectric * 1.070y (including)
Iq_monozukuri_andon Mitsubishielectric - (including) - (including)
Iq_monozukuri_process_remote_monitoring Mitsubishielectric - (including) - (including)
M_commdtm-hart Mitsubishielectric * *
M_commdtm-io-link Mitsubishielectric * *
Melfa-works Mitsubishielectric * 4.4 (including)
Melsec_wincpu_setting_utility Mitsubishielectric * *
Melsoft_em_software_development_kit Mitsubishielectric * *
Melsoft_navigator Mitsubishielectric * 2.74c (including)
Mh11_settingtool_version2 Mitsubishielectric * 2.004e (including)
Mi_configurator Mitsubishielectric * *
Mt_works2 Mitsubishielectric * 1.167z (including)
Mx_component Mitsubishielectric * 5.001b (including)
Network_interface_board_cc-link Mitsubishielectric * *
Network_interface_board_cc_ie_control_utility Mitsubishielectric * *
Network_interface_board_cc_ie_field_utility Mitsubishielectric * *
Network_interface_board_mneth_utility Mitsubishielectric * *
Px_developer Mitsubishielectric * 1.53f (including)
Rt_toolbox2 Mitsubishielectric * 3.73b (including)
Rt_toolbox3 Mitsubishielectric * 1.82l (including)
Setting/monitoring_tools_for_the_c_controller_module Mitsubishielectric * *
Slmp_data_collector Mitsubishielectric * 1.04e (including)

Potential Mitigations

References