Summary
Automation Account 'Run as' credentials (PFX certificates) were being stored
in cleartext, in Azure Active Directory (AAD). These credentials were available
to anyone with the ability to read information about App Registrations (typically
most AAD users).
Affected Services
AAD
Remediation
Regenerate exposed certificate
Tracked CVEs
CVE-2021-42306
References
https://msrc-blog.microsoft.com/2021/11/17/guidance-for-azure-active-directory-ad-keycredential-property-information-disclosure-in-application-and-service-principal-apis/https://github.com/microsoft/aad-app-credential-tools/blob/main/azure-migrate/azure-migrate-credential-rotation-guide.mdhttps://www.netspi.com/blog/technical/cloud-penetration-testing/azure-cloud-vulnerability-credmanifest/
Contributed by https://github.com/a10ns
Disclosure Date
Thu, Oct 7th, 2021
Exploitablity Period
-
Known ITW Exploitation
-
Detection Methods
-
Piercing Index Rating
5.96
(PI:1.5/A3:1.05/A4:1.05/A5:1.05/A6:6/A7:1.1/A8:1.1)
Discovered by
Karl Fosaaen, NetSPI
