CVE-2020-26558

2021-06-0800:00:00

ubuntu.com

4.3 Medium

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

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

4.2 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

29.5%

JSON

Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1
through 5.2 may permit a nearby man-in-the-middle attacker to identify the
Passkey used during pairing (in the Passkey authentication procedure) by
reflection of the public key and the authentication evidence of the
initiating device, potentially permitting this attacker to complete
authenticated pairing with the responding device using the correct Passkey
for the pairing session. The attack methodology determines the Passkey
value one bit at a time.

Notes

Author	Note
alexmurray	Affects bluez versions prior to 5.57 and 5.58
mdeslaur	There is a kernel fix, and a userspace fix

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-151.157UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-80.90UNKNOWN
ubuntu21.04noarchlinux< 5.11.0-31.33UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-219.252UNKNOWN
ubuntu18.04noarchlinux-azure-4.15< 4.15.0-1121.134UNKNOWN
ubuntu18.04noarchlinux-azure-5.4< 5.4.0-1055.57~18.04.1UNKNOWN
ubuntu18.04noarchlinux-dell300x< 4.15.0-1027.32UNKNOWN
ubuntu20.04noarchlinux-gcp< 5.4.0-1049.53UNKNOWN
ubuntu21.04noarchlinux-gcp< 5.11.0-1017.19UNKNOWN
ubuntu16.04noarchlinux-gcp< 4.15.0-1106.120~16.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-151.157	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-80.90	UNKNOWN
ubuntu	21.04	noarch	linux	< 5.11.0-31.33	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-219.252	UNKNOWN
ubuntu	18.04	noarch	linux-azure-4.15	< 4.15.0-1121.134	UNKNOWN
ubuntu	18.04	noarch	linux-azure-5.4	< 5.4.0-1055.57~18.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-dell300x	< 4.15.0-1027.32	UNKNOWN
ubuntu	20.04	noarch	linux-gcp	< 5.4.0-1049.53	UNKNOWN
ubuntu	21.04	noarch	linux-gcp	< 5.11.0-1017.19	UNKNOWN
ubuntu	16.04	noarch	linux-gcp	< 4.15.0-1106.120~16.04.1	UNKNOWN