CVE-2020-26556

Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, able to conduct a successful brute-force attack on an insufficiently random AuthValue before the provisioning procedure times out, to complete authentication by leveraging Malleable Commitment.

CVSS v3.0 7.5 HIGH
CVSS v2.0 2.9 LOW

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

2.9^/10

CVSS v2.0 : LOW

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

Exploitability : 5.5 / Impact : 2.9

Access Vector ADJACENT_NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://kb.cert.org/vuls/id/799380	Third Party Advisory US Government Resource
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/	Vendor Advisory
https://www.kb.cert.org/vuls/id/799380	Third Party Advisory US Government Resource

Advertisement

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:bluetooth:bluetooth_core_specification::::::::
	cpe:2.3:a:bluetooth:mesh_profile:1.0.0:::::::*
	cpe:2.3:a:bluetooth:mesh_profile:1.0.1:::::::*

Information

Published : 2021-05-24 11:15

Updated : 2022-04-29 07:10

NVD link : CVE-2020-26556

Mitre link : CVE-2020-26556

JSON object : View

CWE

CWE-307

Improper Restriction of Excessive Authentication Attempts

Advertisement

Products Affected

bluetooth

mesh_profile
bluetooth_core_specification

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://kb.cert.org/vuls/id/799380", "name": "https://kb.cert.org/vuls/id/799380", "tags": ["Third Party Advisory", "US Government Resource"], "refsource": "MISC"}, {"url": "https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/", "name": "https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/", "tags": ["Vendor Advisory"], "refsource": "MISC"}, {"url": "https://www.kb.cert.org/vuls/id/799380", "name": "VU#799380", "tags": ["Third Party Advisory", "US Government Resource"], "refsource": "CERT-VN"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, able to conduct a successful brute-force attack on an insufficiently random AuthValue before the provisioning procedure times out, to complete authentication by leveraging Malleable Commitment."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-307"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2020-26556", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 2.9, "accessVector": "ADJACENT_NETWORK", "vectorString": "AV:A/AC:M/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "severity": "LOW", "acInsufInfo": false, "impactScore": 2.9, "obtainAllPrivilege": false, "exploitabilityScore": 5.5, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.6}}, "publishedDate": "2021-05-24T18:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:bluetooth:bluetooth_core_specification:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "5.2", "versionStartIncluding": "1.0b"}, {"cpe23Uri": "cpe:2.3:a:bluetooth:mesh_profile:1.0.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:bluetooth:mesh_profile:1.0.1:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-04-29T14:10Z"}