Vulnerability Monitor

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CVE-2020-26556

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.

Published

2021-05-24T18:15:07.873

Last Modified

2024-11-21T05:20:04.427

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

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

Access Vector: ADJACENT_NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

5.5

Impact Score

2.9

Weaknesses

Type: Primary
CWE-307

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	bluetooth	bluetooth_core_specification	≤ 5.2	Yes
Application	bluetooth	mesh_profile	1.0.0	Yes
Application	bluetooth	mesh_profile	1.0.1	Yes

References

https://kb.cert.org/vuls/id/799380 Third Party Advisory, US Government Resource ([email protected])
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/ Vendor Advisory ([email protected])
https://www.kb.cert.org/vuls/id/799380 Third Party Advisory, US Government Resource ([email protected])
https://kb.cert.org/vuls/id/799380 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.kb.cert.org/vuls/id/799380 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)