CVE-2020-9770
Description
From CVE.org
A logic issue was addressed with improved state management. This issue is fixed in iOS 13.4 and iPadOS 13.4. An attacker in a privileged network position may be able to intercept Bluetooth traffic.
Statement
The research paper describes that Bluetooth Low Energy connections managed through bluetoothctl control or via D-Bus API are not vulnerable to this attack as they strictly follow the proactive authentication specification. Connections that are managed by gatttool are among those that may be vulnerable.
Mitigation
Bluetooth Low Energy can be disabled altogether if it is not required, using the configuration below. This will prevent BLE devices from connecting with the host, disabling this attack
ControllerMode=bredr
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.6 | 6.5 | N/A |
| Attack Vector | Physical | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | Low | N/A |
| User Interaction | Required | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | None | N/A |
| Availability Impact | High | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Frequently Asked Questions
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