Memory corruption vulnerability in Mitsubishi PLC could lead to DoS, code execution

Cisco Talos recently discovered a memory corruption vulnerability in the Mitsubishi MELSEC iQ-F FX5U programmable logic controller that is caused by a buffer overflow condition.

The iQ-F FX5U is one offering in Mitsubishi’s MELSEC PLC line of hardware that comes with a built-in processor, power supply, Ethernet and 16 I/O points. Users can configure this PLC to host multiple network services, such as an HTTP Server, FTP Server, FTP Client, MODBUS/TCP interface and other Mitsubishi-specific protocols.

A vulnerability, TALOS-2023-1727 (CVE-2023-1424), …

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