Bluetooth Classic Implementation in Espressif ESP-IDF 4.4 and Earlier: Multiple LMP IO Capability Request Packet Vulnerability

CVE-2021-28136 · MEDIUM Severity

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly handle the reception of multiple LMP IO Capability Request packets during the pairing process, allowing attackers in radio range to trigger memory corruption (and consequently a crash) in ESP32 via a replayed (duplicated) LMP packet.

Learn more about our Web Application Penetration Testing UK.