CAPEC-668
Key Negotiation of Bluetooth Attack (KNOB)
2021-06-24
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特定のCAPECのアラート
特定のCAPECの変更情報をいち早くお届けします。
CAPEC の説明
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 の情報
実行フロー
1) Explore
[Discovery] Using an established Person in the Middle setup, search for Bluetooth devices beginning the authentication process.
技法
- 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.
前提条件
Person in the Middle network setup.必要なスキル
Ability to modify packets.必要なリソース
Bluetooth adapter, packet capturing capabilities.緩和策
Newer Bluetooth firmwares ensure that the KNOB is not negotaited in plaintext. Update your device.関連する弱点
| 弱点名 | |
|---|---|
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. |
参考文献
REF-657
Bluetooth vulnerability can be exploited in Key Negotiation of Bluetooth (KNOB) attacksJovi Umawing.
https://blog.malwarebytes.com/awareness/2019/08/bluetooth-vulnerability-can-be-exploited-in-key-negotiation-of-bluetooth-knob-attacks/
登録情報
| 名前 | 組織 | 日付 | リリース日 |
|---|---|---|---|
| CAPEC Content Team | The MITRE Corporation |
変更履歴
| 名前 | 組織 | 日付 | コメント |
|---|---|---|---|
| CAPEC Content Team | The MITRE Corporation | Updated Taxonomy_Mappings |
