CVE-2020-35693 Information

Description

On some Samsung phones and tablets running Android through 7.1.1 it is possible for an attacker-controlled Bluetooth Low Energy (BLE) device to pair silently with a vulnerable target device without any user interaction when the target device’s Bluetooth is on and it is running an app that offers a connectable BLE advertisement. An example of such an app could be a Bluetooth-based contact tracing app such as Australia’s COVIDSafe app Singapore’s TraceTogether app or France’s TousAntiCovid (formerly StopCovid). As part of the pairing process two pieces (among others) of personally identifiable information are exchanged: the Identity Address of the Bluetooth adapter of the target device and its associated Identity Resolving Key (IRK). Either one of these identifiers can be used to perform re-identification of the target device for long term tracking. The list of affected devices includes (but is not limited to): Galaxy Note 5 Galaxy S6 Edge Galaxy A3 Tab A (2017) J2 Pro (2018) Galaxy Note 4 and Galaxy S5.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/alwentiu/contact-tracing-research/blob/main/samsung.pdf

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8