CVE-2021-28135

Description

The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service (crash) in ESP32 by flooding the target device with LMP Feature Response data.

6.5

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.23%

Third-Party Advisory github.com Third-Party Advisory github.com

Affected: n/a n/a

References

Link	Tags
https://github.com/espressif/esp-idf	third party advisory
https://github.com/espressif/esp32-bt-lib	third party advisory
https://www.espressif.com/en/products/socs/esp32	product
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf	broken link

Frequently Asked Questions

What is the severity of CVE-2021-28135?: CVE-2021-28135 has been scored as a medium severity vulnerability.
How to fix CVE-2021-28135?: To fix CVE-2021-28135, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-28135 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-28135 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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