4.2 Medium
CVSS3
Attack Vector
ADJACENT_NETWORK
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
4.3 Medium
CVSS2
Access Vector
ADJACENT_NETWORK
Access 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
0.001 Low
EPSS
Percentile
27.6%
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.
Author | Note |
---|---|
alexmurray | Affects bluez versions prior to 5.57 and 5.58 |
mdeslaur | There is a kernel fix, and a userspace fix |
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) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | 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) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26558
kb.cert.org/vuls/id/799380
launchpad.net/bugs/cve/CVE-2020-26558
nvd.nist.gov/vuln/detail/CVE-2020-26558
security-tracker.debian.org/tracker/CVE-2020-26558
ubuntu.com/security/notices/USN-4989-1
ubuntu.com/security/notices/USN-4989-2
ubuntu.com/security/notices/USN-5017-1
ubuntu.com/security/notices/USN-5018-1
ubuntu.com/security/notices/USN-5046-1
ubuntu.com/security/notices/USN-5050-1
ubuntu.com/security/notices/USN-5299-1
ubuntu.com/security/notices/USN-5343-1
www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/passkey-entry/
www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00517.html
4.2 Medium
CVSS3
Attack Vector
ADJACENT_NETWORK
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
4.3 Medium
CVSS2
Access Vector
ADJACENT_NETWORK
Access 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
0.001 Low
EPSS
Percentile
27.6%