Vulnerability Description
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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Azure Active Directory | < 2021-10-30 |
| Microsoft | Azure Active Site Recovery | < 2021-11-01 |
| Microsoft | Azure Automation | < 2021-10-15 |
| Microsoft | Azure Migrate | < 2021-11-02 |
Related Weaknesses (CWE)
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-4230PatchVendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-4230PatchVendor Advisory
FAQ
What is CVE-2021-42306?
CVE-2021-42306 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 ...
How severe is CVE-2021-42306?
CVE-2021-42306 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-42306?
Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Azure Active Directory, Microsoft Azure Active Site Recovery, Microsoft Azure Automation, Microsoft Azure Migrate.