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ubuntucveUbuntu.comUB:CVE-2020-15802
HistorySep 11, 2020 - 12:00 a.m.

CVE-2020-15802

2020-09-1100:00:00
ubuntu.com
ubuntu.com
19
bluetooth 5.1
man-in-the-middle
cross transport key derivation
unauthenticated user
bonding
authentication

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

EPSS

0.001

Percentile

31.9%

Devices supporting Bluetooth before 5.1 may allow man-in-the-middle
attacks, aka BLURtooth. Cross Transport Key Derivation in Bluetooth Core
Specification v4.2 and v5.0 may permit an unauthenticated user to establish
a bonding with one transport, either LE or BR/EDR, and replace a bonding
already established on the opposing transport, BR/EDR or LE, potentially
overwriting an authenticated key with an unauthenticated key, or a key with
greater entropy with one with less.

Bugs

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

EPSS

0.001

Percentile

31.9%