Vulnerability identifier: #VU56308

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-28139

CWE-ID: CWE-94

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Espressif Systems

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to the Bluetooth Classic implementation does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet. A remote attacker in radio range can use a specially crafted Extended Features bitfield payload and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ESP-IDF: 0.9 - 4.4

ESP-WROVER-KIT: All versions

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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.