Stack-Based Buffer Overflow in OreSat Firmware

Executive Summary

This is a stack-based buffer overflow in OreSat Firmware v1.0. It occurs in the cmd_edl function when handling the edl fw_flash command. The vulnerability arises because a filename argument is copied into a fixed 64-byte stack buffer using memcpy without checking the input length. An attacker with physical access to the UART3 serial interface can exploit this by sending a command with an oversized filename to trigger a buffer overflow.

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Impact Analysis

An attacker could exploit this to execute arbitrary code on the device, potentially gaining control over the OreSat system. This might lead to system crashes, unauthorized access, or manipulation of the device's operations. Physical access to the UART3 interface is required, limiting the attack surface.

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Mitigation Strategies

Disable physical access to the UART3 serial interface to prevent unauthorized command execution. Ensure the firmware is updated to a patched version that validates filename length before copying to the stack buffer.

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