CVE-2021-27952

Hardcoded default root credentials exist on the ecobee3 lite 4.5.81.200 device. This allows a threat actor to gain access to the password-protected bootloader environment through the serial console.

CVSS v3 9.8 CRITICAL
CVSS v2.0 5.0 MEDIUM

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://www.l9group.com/advisories/hard-coded-default-root-credentials-for-all-ecobee3-lite-devices	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:ecobee:ecobee3_lite_firmware:4.5.81.200:*:*:*:*:*:*:*

cpe:2.3:h:ecobee:ecobee3_lite:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-08-03 15:15

Updated : 2024-02-28 18:28

NVD link : CVE-2021-27952

Mitre link : CVE-2021-27952

CVE.ORG link : CVE-2021-27952

JSON object : View

Products Affected

ecobee

ecobee3_lite_firmware
ecobee3_lite

CWE

CWE-798

Use of Hard-coded Credentials

{"id": "CVE-2021-27952", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2021-08-03T15:15:08.250", "references": [{"url": "https://www.l9group.com/advisories/hard-coded-default-root-credentials-for-all-ecobee3-lite-devices", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-798"}]}], "descriptions": [{"lang": "en", "value": "Hardcoded default root credentials exist on the ecobee3 lite 4.5.81.200 device. This allows a threat actor to gain access to the password-protected bootloader environment through the serial console."}, {"lang": "es", "value": "Se presentan credenciales root predeterminadas embebidas en el dispositivo ecobee3 lite versi\u00f3n 4.5.81.200. Esto permite a un actor de la amenaza obtener acceso al entorno del cargador de arranque protegido por contrase\u00f1a mediante la consola de serie"}], "lastModified": "2021-08-12T14:56:50.900", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:ecobee:ecobee3_lite_firmware:4.5.81.200:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FDA0D6FC-A69F-4F21-9F49-EEA1FA924B8A"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:ecobee:ecobee3_lite:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "665F647B-440F-4059-B7E7-70245C66B028"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "cve@mitre.org"}