If Ethernet communication of the JTEKT Corporation TOYOPUC product series’ (TOYOPUC-PC10 Series: PC10G-CPU TCC-6353: All versions, PC10GE TCC-6464: All versions, PC10P TCC-6372: All versions, PC10P-DP TCC-6726: All versions, PC10P-DP-IO TCC-6752: All versions, PC10B-P TCC-6373: All versions, PC10B TCC-1021: All versions, PC10B-E/C TCU-6521: All versions, PC10E TCC-4737: All versions; TOYOPUC-Plus Series: Plus CPU TCC-6740: All versions, Plus EX TCU-6741: All versions, Plus EX2 TCU-6858: All versions, Plus EFR TCU-6743: All versions, Plus EFR2 TCU-6859: All versions, Plus 2P-EFR TCU-6929: All versions, Plus BUS-EX TCU-6900: All versions; TOYOPUC-PC3J/PC2J Series: FL/ET-T-V2H THU-6289: All versions, 2PORT-EFR THU-6404: All versions) are left in an open state by an attacker, Ethernet communications cannot be established with other devices, depending on the settings of the link parameters.

When JTEKT Corporation TOYOPUC PLC versions PC10G-CPU, 2PORT-EFR, Plus CPU, Plus EX, Plus EX2, Plus EFR, Plus EFR2, Plus 2P-EFR, PC10P-DP, PC10P-DP-IO, Plus BUS-EX, Nano 10GX, Nano 2ET,PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B,PC10B-P, Nano CPU, PC10P, and PC10GE receive an invalid frame, the outside area of a receive buffer for FL-net are overwritten. As a result, the PLC CPU detects a system error, and the affected products stop.

All versions of the afffected TOYOPUC-PC10 Series,TOYOPUC-Plus Series,TOYOPUC-PC3J/PC2J Series, TOYOPUC-Nano Series products may not be able to properly process an ICMP flood, which may allow an attacker to deny Ethernet communications between affected devices.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of KOYO Screen Creator 0.1.1.1. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of SCA2 files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14868.

JTEKT TOYOPUC PLCs through 2022-04-29 mishandle authentication. They utilize the CMPLink/TCP protocol (configurable on ports 1024-65534 on either TCP or UDP) for a wide variety of engineering purposes such as starting and stopping the PLC, downloading and uploading projects, and changing configuration settings. This protocol does not have any authentication features, allowing any attacker capable of communicating with the port in question to invoke (a subset of) desired functionality.

JTEKT TOYOPUC PLCs through 2022-04-29 do not ensure data integrity. They utilize the unauthenticated CMPLink/TCP protocol for engineering purposes, including downloading projects and control logic to the PLC. Control logic is downloaded to the PLC on a block-by-block basis with a given memory address and a blob of machine code. The logic that is downloaded to the PLC is not cryptographically authenticated, allowing an attacker to execute arbitrary machine code on the PLC's CPU module in the context of the runtime. In the case of the PC10G-CPU, and likely for other CPU modules of the TOYOPUC family, a processor without MPU or MMU is used and this no memory protection or privilege-separation capabilities are available, giving an attacker full control over the CPU.

Out-of-bound write vulnerability exists in Screen Creator Advance 2 Ver.0.1.1.4 Build01 and earlier due to lack of error handling process when out of specification errors are detected. Having a user of Screen Creator Advance 2 to open a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Out-of-bound read vulnerability exists in Screen Creator Advance 2 Ver.0.1.1.4 Build01 and earlier because the end of data cannot be verified when processing template information. Having a user of Screen Creator Advance 2 to open a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Out-of-bound read vulnerability exists in Screen Creator Advance 2 Ver.0.1.1.4 Build01 and earlier because the end of data cannot be verified when processing file structure information. Having a user of Screen Creator Advance 2 to open a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Out-of-bound read vulnerability exists in Screen Creator Advance 2 Ver.0.1.1.4 Build01 and earlier because the end of data cannot be verified when processing screen management information. Having a user of Screen Creator Advance 2 to open a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Out-of-bound read vulnerability exists in Screen Creator Advance 2 Ver.0.1.1.4 Build01 and earlier because the end of data cannot be verified when processing parts management information. Having a user of Screen Creator Advance 2 to open a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Out-of-bound read vulnerability exists in Screen Creator Advance 2 Ver.0.1.1.4 Build01 and earlier because the end of data cannot be verified when processing control management information. Having a user of Screen Creator Advance 2 to open a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Use-after free vulnerability exists in Screen Creator Advance 2 Ver.0.1.1.4 Build01 and earlier due to lack of error handling process even when an error was detected. Having a user of Screen Creator Advance 2 to open a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Out-of-bounds read vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) Version 1.6.9.0 and earlier. When processing a comment block in stage information, the end of data cannot be verified and out-of-bounds read occurs. As a result, opening a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Out-of-bounds read vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) Version 1.6.9.0 and earlier. The insufficient buffer size for the PLC program instructions leads to out-of-bounds read. As a result, opening a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Use-after-free vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) Version 1.6.9.0 and earlier. With the abnormal value given as the maximum number of columns for the PLC program, the process accesses the freed memory. As a result, opening a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Screen Creator Advance 2 Ver.0.1.1.4 Build01A and earlier is vulnerable to improper restriction of operations within the bounds of a memory buffer (CWE-119) due to improper check of its data size when processing a project file. If a user of Screen Creator Advance 2 opens a specially crafted project file, information may be disclosed and/or arbitrary code may be executed.

Double free issue exists in Kostac PLC Programming Software Version 1.6.11.0 and earlier. Arbitrary code may be executed by having a user open a specially crafted project file which was saved using Kostac PLC Programming Software Version 1.6.9.0 and earlier because the issue exists in parsing of KPP project files. The vendor states that Kostac PLC Programming Software Version 1.6.10.0 or later implements the function which prevents a project file alteration. Therefore, to mitigate the impact of these vulnerabilities, a project file which was saved using Kostac PLC Programming Software Version 1.6.9.0 and earlier needs to be saved again using Kostac PLC Programming Software Version 1.6.10.0 or later.

Use after free vulnerability exists in Kostac PLC Programming Software Version 1.6.11.0. Arbitrary code may be executed by having a user open a specially crafted project file which was saved using Kostac PLC Programming Software Version 1.6.9.0 and earlier because the issue exists in parsing of KPP project files. The vendor states that Kostac PLC Programming Software Version 1.6.10.0 or later implements the function which prevents a project file alteration. Therefore, to mitigate the impact of these vulnerabilities, a project file which was saved using Kostac PLC Programming Software Version 1.6.9.0 and earlier needs to be saved again using Kostac PLC Programming Software Version 1.6.10.0 or later.

Denial-of-service (DoS) vulnerability exists in FTP service of HMI GC-A2 series. If a remote unauthenticated attacker sends a specially crafted packets to specific ports, a denial-of-service (DoS) condition may occur.

Improper restriction of operations within the bounds of a memory buffer issue exists in OnSinView2 versions 2.0.1 and earlier. If this vulnerability is exploited, information may be disclosed or arbitrary code may be executed by having a user open a specially crafted OnSinView2 project file.

Stack-based buffer overflow vulnerability exists in OnSinView2 versions 2.0.1 and earlier. If this vulnerability is exploited, information may be disclosed or arbitrary code may be executed by having a user open a specially crafted OnSinView2 project file.

Denial-of-service (DoS) vulnerability exists in commplex-link service of HMI GC-A2 series. If a remote unauthenticated attacker sends a specially crafted packets to specific ports, a denial-of-service (DoS) condition may occur.

Denial-of-service (DoS) vulnerability exists in rfe service of HMI GC-A2 series. If a remote unauthenticated attacker sends a specially crafted packets to specific ports, a denial-of-service (DoS) condition may occur.

Denial-of-service (DoS) vulnerability exists in NetBIOS service of HMI GC-A2 series. If a remote unauthenticated attacker sends a specially crafted packets to specific ports, a denial-of-service (DoS) condition may occur.