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MitreCVE-2020-26556

HistoryMay 24, 2021 - 6:15 p.m.

CVE-2020-26556

2021-05-2418:15:07

CWE-307

mitre

web.nvd.nist.gov

cve-2020-26556

bluetooth mesh

authentication

malleable commitment

security vulnerability

nvd

CVSS2

2.9

Attack Vector

ADJACENT_NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:A/AC:M/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

7.7

Confidence

High

EPSS

0.001

Percentile

25.1%

JSON

Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, able to conduct a successful brute-force attack on an insufficiently random AuthValue before the provisioning procedure times out, to complete authentication by leveraging Malleable Commitment.

Affected configurations

Nvd

Node

bluetoothbluetooth_core_specificationRange1.0b–5.2

bluetoothmesh_profileMatch1.0.0

bluetoothmesh_profileMatch1.0.1

VendorProductVersionCPE
bluetoothbluetooth_core_specification*cpe:2.3:a:bluetooth:bluetooth_core_specification:*:*:*:*:*:*:*:*
bluetoothmesh_profile1.0.0cpe:2.3:a:bluetooth:mesh_profile:1.0.0:*:*:*:*:*:*:*
bluetoothmesh_profile1.0.1cpe:2.3:a:bluetooth:mesh_profile:1.0.1:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
bluetooth	bluetooth_core_specification	*	cpe:2.3:a:bluetooth:bluetooth_core_specification::::::::
bluetooth	mesh_profile	1.0.0	cpe:2.3:a:bluetooth:mesh_profile:1.0.0:::::::*
bluetooth	mesh_profile	1.0.1	cpe:2.3:a:bluetooth:mesh_profile:1.0.1:::::::*