There is a vulnerability in the Supermicro BMC firmware validation logic at Supermicro MBD-X13SEM-F . An attacker can update the system firmware with a specially crafted image.

The Supermicro BMC implementation allows remote attackers to bypass authentication and execute arbitrary IPMI commands by using cipher suite 0 (aka cipher zero) and an arbitrary password.

An issue was discovered on Supermicro BMC firmware in select X11, X12, H12, B12, X13, H13, and B13 motherboards (and CMM6 modules). An unauthenticated user can post crafted data to the interface that triggers a stack buffer overflow, and may lead to arbitrary remote code execution on a BMC.