Vulnerability Name:

CVE-2020-15802 (CCN-187978)

Assigned:2020-09-09
Published:2020-09-09
Updated:2022-11-16
Summary: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.
CVSS v3 Severity:5.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
7.4 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)
6.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
7.1 High (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:C/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-287
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2020-15802

Source: CCN
Type: US-CERT VU#589825
Devices supporting Bluetooth BR/EDR and LE using CTKD are vulnerable to key overwrite

Source: XF
Type: UNKNOWN
bluetooth-cve202015802-mitm(187978)

Source: MISC
Type: Third Party Advisory
https://gizmodo.com/bluetooth-unveils-its-latest-security-issue-with-no-se-1845013709

Source: CCN
Type: Bluetooth Security Notice
Bluetooth SIG Statement Regarding the Exploiting Cross-Transport Key Derivation in Bluetooth Classic and Bluetooth Low Energy Vulnerability (BLURtooth)

Source: CONFIRM
Type: Vendor Advisory
https://www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/bluetooth-security/blurtooth/

Source: MISC
Type: Third Party Advisory, US Government Resource
https://www.kb.cert.org/vuls/id/589825

Vulnerable Configuration:Configuration 1:
  • cpe:/a:bluetooth:bluetooth_core_specification:*:*:*:*:*:*:*:* (Version < 5.1)

    • * Denotes that component is vulnerable
    BACK
    bluetooth bluetooth core specification *