CVE-2021-34144

Description

The Bluetooth Classic implementation in the Zhuhai Jieli AC6366C BT SDK through 0.9.1 does not properly handle the reception of truncated LMP_SCO_Link_Request packets while no other BT connections are active, allowing attackers in radio range to prevent new BT connections (disabling the AB5301A inquiry and page scan procedures) via a crafted LMP packet. The user needs to manually perform a power cycle (restart) of the device to restore BT connectivity.

6.5

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.14%

Third-Party Advisory packetstormsecurity.net Third-Party Advisory github.com Third-Party Advisory bluetooth.com

Affected: n/a n/a

References

Link	Tags
https://github.com/Jieli-Tech/fw-AC63_BT_SDK	third party advisory
https://launchstudio.bluetooth.com/ListingDetails/91371	third party advisory
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf	third party advisory technical description

Frequently Asked Questions

What is the severity of CVE-2021-34144?: CVE-2021-34144 has been scored as a medium severity vulnerability.
How to fix CVE-2021-34144?: To fix CVE-2021-34144, 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-2021-34144 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-34144 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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