CyberRota Analysis
AI-GeneratedThe Bosch BME690 SensorAPI C-driver versions v1.0.3 and earlier are vulnerable to an out-of-bounds read due to insufficient boundary checks in the gas index parsing logic. This flaw allows an attacker or compromised device on the I2C/SPI bus to exploit the driver, potentially leading to measurement corruption or exposure of sensitive adjacent stack memory. Organizations using this sensor API should prioritize patching this vulnerability to mitigate risks associated with data integrity and confidentiality.
Original NVD Description
An out-of-bounds read vulnerability was discovered in the Bosch BME690 SensorAPI (C-driver) in version v1.0.3 and prior, specifically within the field data parsing logic in read_all_field_data (bme69x.c). The driver prefetches heater configuration registers into a contiguous 30-byte stack buffer (set_val) mapping IDAC, RES_HEAT, and GAS_WAIT tables. When parsing sensor field data, the gas_index is extracted using a 4-bit mask (0..15) but lacks boundary verification against the valid range (0..9). An attacker or a compromised peripheral mimicking a sensor on the I2C/SPI bus could return a payload with a gas index value of 10 or higher. This causes the driver to perform an out-of-bounds array access (set_val[20 + gas_index]), reading up to 6 bytes past the stack buffer. The leaked out-of-bounds byte is then written into the public gas_wait field, which may lead to measurement corruption or leak adjacent stack memory when telemetered or logged.