CVE-2021-34143

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-07 · updated 2026-06-17

Description

The Bluetooth Classic implementation in the Zhuhai Jieli AC6366C_DEMO_V1.0 does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after paging procedure. User intervention is required to restart the device.

Affected products

Zh-Jieli Fw-Ac63 Bt Sdk: 1.0.0

References

https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
https://github.com/Jieli-Tech/fw-AC63_BT_SDK
https://launchstudio.bluetooth.com/ListingDetails/91371
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
https://github.com/Jieli-Tech/fw-AC63_BT_SDK
https://launchstudio.bluetooth.com/ListingDetails/91371

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