Vulnerability identifier: #VU56310

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-28136

CWE-ID: CWE-119

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
ESP-WROVER-KIT
Hardware solutions / Routers & switches, VoIP, GSM, etc
ESP-IDF
Server applications / Other server solutions
ESP32
Hardware solutions / Firmware

Vendor: Espressif Systems

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the Bluetooth Classic implementation does not properly handle the reception of multiple LMP_IO_Capability_req packets during the pairing process. A remote attacker in radio range can send a specially crafted LMP packet, trigger memory corruption and cause a denial of service condition on the target system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ESP-WROVER-KIT: All versions

ESP-IDF: 0.9 - 4.4

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External links
http://asset-group.github.io/disclosures/braktooth/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.