CAPEC 설명

An adversary can exploit a flaw in Bluetooth key negotiation allowing them to decrypt information sent between two devices communicating via Bluetooth. The adversary uses an Adversary in the Middle setup to modify packets sent between the two devices during the authentication process, specifically the entropy bits. Knowledge of the number of entropy bits will allow the attacker to easily decrypt information passing over the line of communication.

CAPEC 정보

실행 흐름

1) Explore

[Discovery] Using an established Person in the Middle setup, search for Bluetooth devices beginning the authentication process.

기법

Use packet capture tools.

2) Experiment

[Change the entropy bits] Upon recieving the initial key negotiation packet from the master, the adversary modifies the entropy bits requested to 1 to allow for easy decryption before it is forwarded.

3) Exploit

[Capture and decrypt data] Once the entropy of encryption is known, the adversary can capture data and then decrypt on their device.

사전 조건

Person in the Middle network setup.

필요 기술

Ability to modify packets.

필요 리소스

Bluetooth adapter, packet capturing capabilities.

완화 방법

Newer Bluetooth firmwares ensure that the KNOB is not negotaited in plaintext. Update your device.

관련 약점

CWE-ID	약점 이름
CWE-425	Direct Request The web application does not adequately enforce appropriate authorization on all restricted URLs, scripts, or files.
CWE-285	Improper Authorization The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
CWE-693	Protection Mechanism Failure The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

참고 자료

REF-657

Bluetooth vulnerability can be exploited in Key Negotiation of Bluetooth (KNOB) attacks
Jovi Umawing.
https://blog.malwarebytes.com/awareness/2019/08/bluetooth-vulnerability-can-be-exploited-in-key-negotiation-of-bluetooth-knob-attacks/

제출

이름	조직	날짜	출시일
CAPEC Content Team	The MITRE Corporation	2021-06-24 +00:00

수정 사항

이름	조직	날짜	댓글
CAPEC Content Team	The MITRE Corporation	2022-09-29 +00:00	Updated Taxonomy_Mappings

CAPEC-668 상세 정보

CAPEC-668