CVE-2021-42306

An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate keyCredential  on an Azure AD Application or Service Principal (which is not recommended). This vulnerability allows a user or service in the tenant with application read access to read the private key data that was added to the application. Azure AD addressed this vulnerability by preventing disclosure of any private key values added to the application. Microsoft has identified services that could manifest this vulnerability, and steps that customers should take to be protected. Refer to the FAQ section for more information. For more details on this issue, please refer to the MSRC Blog Entry.

CVSS v3 8.1 HIGH
CVSS v2.0 4.0 MEDIUM

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

4.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42306	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:microsoft:azure_active_directory::::::::
	cpe:2.3:a:microsoft:azure_active_site_recovery::::::::
	cpe:2.3:a:microsoft:azure_automation::::::::
	cpe:2.3:a:microsoft:azure_migrate::::::::

History

No history.

Information

Published : 2021-11-24 01:15

Updated : 2024-05-28 21:15

NVD link : CVE-2021-42306

Mitre link : CVE-2021-42306

CVE.ORG link : CVE-2021-42306

JSON object : View

Products Affected

microsoft

azure_migrate
azure_automation
azure_active_site_recovery
azure_active_directory

CWE

CWE-522

Insufficiently Protected Credentials

{"id": "CVE-2021-42306", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N", "authentication": "SINGLE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.8}, {"type": "Secondary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "published": "2021-11-24T01:15:08.363", "references": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42306", "tags": ["Patch", "Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-522"}]}], "descriptions": [{"lang": "en", "value": "An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate keyCredential\u202f on an Azure AD Application or Service Principal (which is not recommended). This vulnerability allows a user or service in the tenant with application read access to read the private key data that was added to the application.\nAzure AD\u202faddressed this vulnerability by preventing disclosure of any private key\u202fvalues added\u202fto the application.\nMicrosoft has identified services that could manifest this vulnerability, and steps that customers should take to be protected. Refer to the FAQ section for more information.\nFor more details on this issue, please refer to the MSRC Blog Entry.\n"}, {"lang": "es", "value": "Una vulnerabilidad de Divulgaci\u00f3n de Informaci\u00f3n de Azure Active Directory"}], "lastModified": "2024-05-28T21:15:29.680", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:azure_active_directory:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E330A501-E24E-4832-AC8C-D36F3057A2F1", "versionEndExcluding": "2021-10-30"}, {"criteria": "cpe:2.3:a:microsoft:azure_active_site_recovery:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "671F015B-9F9C-424C-AD6F-5FA7E6AD79C4", "versionEndExcluding": "2021-11-01"}, {"criteria": "cpe:2.3:a:microsoft:azure_automation:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "30062F8C-2A4B-4ACB-AD96-81B056086D3C", "versionEndExcluding": "2021-10-15"}, {"criteria": "cpe:2.3:a:microsoft:azure_migrate:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "87634328-1533-4851-954C-FF2F2A7F0B5F", "versionEndExcluding": "2021-11-02"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}