CVE-2021-42306

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

8.1 /10

CVSS v3 : HIGH

V3 Legend

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

V2 Legend

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

28 May 2024, 21:15

Type Values Removed Values Added
Summary (en) <p>An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate <a href="https://docs.microsoft.com/en-us/graph/api/resources/keycredential?view=graph-rest-1.0">keyCredential</a>  on an Azure AD <a href="https://docs.microsoft.com/en-us/azure/active-directory/develop/app-objects-and-service-principals">Application or Service Principal</a> (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.</p> <p>Azure AD addressed this vulnerability by preventing disclosure of any private key values added to the application.</p> <p>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.</p> <p>For more details on this issue, please refer to the <a href="https://aka.ms/CVE-2021-42306-AAD">MSRC Blog Entry</a>.</p> (en) 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.

28 Dec 2023, 16:15

Type Values Removed Values Added
CVSS v2 : 4.0
v3 : 6.5 		v2 : 4.0
v3 : 8.1
Summary Azure Active Directory Information Disclosure Vulnerability <p>An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate <a href="https://docs.microsoft.com/en-us/graph/api/resources/keycredential?view=graph-rest-1.0">keyCredential</a>? on an Azure AD <a href="https://docs.microsoft.com/en-us/azure/active-directory/develop/app-objects-and-service-principals">Application or Service Principal</a> (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.</p> <p>Azure AD?addressed this vulnerability by preventing disclosure of any private key?values added?to the application.</p> <p>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.</p> <p>For more details on this issue, please refer to the <a href="https://aka.ms/CVE-2021-42306-AAD">MSRC Blog Entry</a>.</p>

12 Jul 2022, 17:42

Type Values Removed Values Added
CWE CWE-668 CWE-522

29 Nov 2021, 19:13

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : 4.0
v3 : 6.5
CPE cpe:2.3:a:microsoft:azure_active_directory:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:azure_migrate:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:azure_active_site_recovery:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:azure_automation:*:*:*:*:*:*:*:*
References (N/A) https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42306 - (N/A) https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42306 - Patch, Vendor Advisory
CWE CWE-668

24 Nov 2021, 04:50

Type Values Removed Values Added
New CVE
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_automation
  • azure_active_directory
  • azure_active_site_recovery
  • azure_migrate
CWE
CWE-522

Insufficiently Protected Credentials