Vulnerability Details : CVE-2021-28136
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-28136
- cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-28136
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-28136
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.3
|
LOW | AV:A/AC:L/Au:N/C:N/I:N/A:P |
6.5
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2021-28136
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-28136
-
https://github.com/espressif/esp-idf
GitHub - espressif/esp-idf: Espressif IoT Development Framework. Official development framework for ESP32.Product;Third Party Advisory
-
https://github.com/espressif/esp32-bt-lib
GitHub - espressif/esp32-bt-lib: ESP32 Bluetooth stack (below HCI layer) precompiled librariesProduct;Third Party Advisory
-
https://www.espressif.com/en/products/socs/esp32
ESP32 Wi-Fi & Bluetooth MCU I Espressif SystemsProduct;Vendor Advisory
-
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
Technical Description;Third Party Advisory
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