High [CVE-2021-42306] Azure Active Directory Information Disclosure Vulnerability
This high-severity Microsoft Server advisory covers CVE-2021-42306 affecting Azure Active Directory.
Android app · Google Play
Monitor future Microsoft Server CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
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.
Affected product named by the advisory: Azure Active Directory.
- Azure Active Directory -
- Azure Automation 1.0.0 before publication
- Azure Migrate -
- Azure Site Recovery -
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- publication
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: publication. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.