#VU53579 Security features bypass in Bluetooth Core Specification - CVE-2020-26558

Vulnerability identifier: #VU53579

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-26558

CWE-ID: CWE-254

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Bluetooth Core Specification
Other software / Other software solutions

Vendor: Bluetooth SIG, Inc.

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to an impersonation in the Passkey Entry protocol flaw. A remote attacker on the local network can perform a man-in-the-middle (MITM) attack and impersonate the initiating device without any previous knowledge.

Note: This vulnerability affects the following specifications:

• BR/EDR Secure Simple Pairing in Bluetooth Core Specifications 2.1 through 5.2
• BR/EDR Secure Connections Pairing in Bluetooth Core Specifications 4.1 through 5.2 
• LE Secure Connections Pairing in Bluetooth Core Specifications 4.2 through 5.2

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

Vulnerable software versions

Bluetooth Core Specification: 2.1 - 5.2

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External links
https://kb.cert.org/vuls/id/799380
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/

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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.