#VU56324 Heap-based buffer overflow in Cypress Semiconductor Corporation products - CVE-2021-34143

Vulnerability identifier: #VU56324

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-34143

CWE-ID: CWE-122

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
AB32VG1
Hardware solutions / Firmware
CC256XCQFN-EM
Hardware solutions / Firmware
CYW920735Q60EVB
Hardware solutions / Firmware
AC6366C_DEMO_V1.0
Hardware solutions / Firmware

Vendor: Texas Instruments Incorporated
Cypress Semiconductor Corporation

Description

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

The vulnerability exists due to the Bluetooth Classic implementation on several chipsets does not properly handle the reception of continuous unsolicited LMP responses. A remote attacker in radio range can pass specially crafted data to the application, trigger heap-based buffer overflow and cause a denial of service condition on the target system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

AB32VG1: All versions

CC256XCQFN-EM: All versions

CYW920735Q60EVB: All versions

AC6366C_DEMO_V1.0: All versions

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External links
https://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.