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ID

VAR-202009-0586


CVE

CVE-2020-15802


TITLE

Devices supporting Bluetooth BR/EDR and LE using CTKD are vulnerable to key overwrite

Trust: 0.8

sources: CERT/CC: VU#589825

DESCRIPTION

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. This vulnerability is being referred to as BLURtooth.CVE-2020-15802 AffectedCVE-2020-15802 Affected

Trust: 1.71

sources: NVD: CVE-2020-15802 // CERT/CC: VU#589825 // VULMON: CVE-2020-15802

IOT TAXONOMY

category:['network device']sub_category:bluetooth device

Trust: 0.1

sources: OTHER: None

AFFECTED PRODUCTS

vendor:bluetoothmodel:core specificationscope:ltversion:5.1

Trust: 1.0

sources: NVD: CVE-2020-15802

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2020-15802
value: MEDIUM

Trust: 1.0

CNNVD: CNNVD-202009-592
value: MEDIUM

Trust: 0.6

VULMON: CVE-2020-15802
value: MEDIUM

Trust: 0.1

nvd@nist.gov: CVE-2020-15802
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:P/A:N
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: PARTIAL
availabilityImpact: NONE
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.1

nvd@nist.gov: CVE-2020-15802
baseSeverity: MEDIUM
baseScore: 5.9
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: HIGH
availabilityImpact: NONE
exploitabilityScore: 2.2
impactScore: 3.6
version: 3.1

Trust: 1.0

sources: VULMON: CVE-2020-15802 // CNNVD: CNNVD-202009-592 // NVD: CVE-2020-15802

PROBLEMTYPE DATA

problemtype:CWE-287

Trust: 1.0

sources: NVD: CVE-2020-15802

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202009-592

TYPE

authorization issue

Trust: 0.6

sources: CNNVD: CNNVD-202009-592

PATCH

title:Bluetooth Core Security vulnerabilitiesurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=128046

Trust: 0.6

title:The Registerurl:https://www.theregister.co.uk/2020/09/11/blurtooth_vulnerability/

Trust: 0.2

title: - url:https://github.com/Live-Hack-CVE/CVE-2020-15802

Trust: 0.1

title: - url:https://github.com/francozappa/blur

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title: - url:https://github.com/goblimey/learn-unix

Trust: 0.1

title: - url:https://github.com/Essen-Lin/Practice-of-the-Attack-and-Defense-of-Computers_Project2

Trust: 0.1

title: - url:https://github.com/JeffroMF/awesome-bluetooth-security321

Trust: 0.1

title: - url:https://github.com/khulnasoft-lab/awesome-security

Trust: 0.1

title: - url:https://github.com/vincent-deng/veracode-container-security-finding-parser

Trust: 0.1

title:Threatposturl:https://threatpost.com/bluetooth-bug-mitm-attacks/159124/

Trust: 0.1

sources: VULMON: CVE-2020-15802 // CNNVD: CNNVD-202009-592

EXTERNAL IDS

db:NVDid:CVE-2020-15802

Trust: 2.6

db:CERT/CCid:VU#589825

Trust: 2.5

db:CNNVDid:CNNVD-202009-592

Trust: 0.6

db:OTHERid:NONE

Trust: 0.1

db:VULMONid:CVE-2020-15802

Trust: 0.1

sources: OTHER: None // CERT/CC: VU#589825 // VULMON: CVE-2020-15802 // CNNVD: CNNVD-202009-592 // NVD: CVE-2020-15802

REFERENCES

url:https://www.kb.cert.org/vuls/id/589825

Trust: 2.3

url:https://gizmodo.com/bluetooth-unveils-its-latest-security-issue-with-no-se-1845013709

Trust: 1.7

url:https://www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/bluetooth-security/blurtooth/

Trust: 1.7

url:cve-2020-15802

Trust: 0.8

url:https://nvd.nist.gov/vuln/detail/cve-2020-15802

Trust: 0.6

url:https://access.redhat.com/security/cve/cve-2020-15802

Trust: 0.6

url:https://vigilance.fr/vulnerability/bluetooth-man-in-the-middle-via-cross-transport-key-derivation-33313

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url:https://ieeexplore.ieee.org/abstract/document/10769424

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url:https://cwe.mitre.org/data/definitions/287.html

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url:https://github.com/live-hack-cve/cve-2020-15802

Trust: 0.1

url:https://nvd.nist.gov

Trust: 0.1

url:https://www.theregister.co.uk/2020/09/11/blurtooth_vulnerability/

Trust: 0.1

url:https://threatpost.com/bluetooth-bug-mitm-attacks/159124/

Trust: 0.1

sources: OTHER: None // CERT/CC: VU#589825 // VULMON: CVE-2020-15802 // CNNVD: CNNVD-202009-592 // NVD: CVE-2020-15802

CREDITS

This document was written by Madison Oliver.We have not received a statement from the vendor.

Trust: 0.8

sources: CERT/CC: VU#589825

SOURCES

db:OTHERid: -
db:CERT/CCid:VU#589825
db:VULMONid:CVE-2020-15802
db:CNNVDid:CNNVD-202009-592
db:NVDid:CVE-2020-15802

LAST UPDATE DATE

2025-01-30T21:57:27.851000+00:00


SOURCES UPDATE DATE

db:CERT/CCid:VU#589825date:2021-02-16T00:00:00
db:VULMONid:CVE-2020-15802date:2022-11-16T00:00:00
db:CNNVDid:CNNVD-202009-592date:2021-01-04T00:00:00
db:NVDid:CVE-2020-15802date:2024-11-21T05:06:12.767

SOURCES RELEASE DATE

db:CERT/CCid:VU#589825date:2020-09-09T00:00:00
db:VULMONid:CVE-2020-15802date:2020-09-11T00:00:00
db:CNNVDid:CNNVD-202009-592date:2020-09-09T00:00:00
db:NVDid:CVE-2020-15802date:2020-09-11T14:15:11.317