Azure / Entra ID attacks
When it applies
Target on Azure and you have some access — SSRF into a VM/App Service with a Managed Identity, a leaked service-principal secret/cert, or a foothold. Goal: steal tokens, abuse Entra roles, reach resources.
Why it works
Azure resources authenticate via Managed Identities and service principals; the IMDS hands out OAuth tokens for them. Entra (Azure AD) roles and app permissions are widely over-assigned, and several (adding credentials to a service principal, role assignment, Owner on a subscription) escalate to control.
Method
- Managed Identity → token (via SSRF, or on the host):
GET http://169.254.169.254/metadata/identity/ oauth2/token?api-version=2018-02-01&resource=https://management.azure.com/with headerMetadata: true(→cloud-imds-ssrf). Also request tokens for Graph, Key Vault, Storage. - Authenticate & enumerate:
az loginwith the SP or token; enumerate roles/resources; map Entra with AzureHound (BloodHound for Azure); ScoutSuite/MicroBurst for misconfig. - Entra / IAM privesc: add credentials to a service principal you can manage → auth as it;
abusive Entra roles (Application/Cloud App Admin, Privileged Role Admin); role assignment
(
Microsoft.Authorization/roleAssignments/write) → grant yourself Owner; consent grants. - Resources & secrets: Key Vault (token for
vault.azure.net), Storage blobs (→ storage misconfig), Automation Accounts / runbooks (RCE as their identity), App Service. - Prove impact read-only as the escalated principal; avoid persistent role changes.
Gotchas
- Two planes: ARM (resources) and Microsoft Graph / Entra (identity) — get tokens for the right
resource/audience. - Managed-identity SSRF needs the
Metadata: trueheader — header-less SSRF won't work (that's the mitigation). - AzureHound reveals Entra attack paths you'd miss manually — run it early.
Verify success
Escalated access proven — a token/role letting you act beyond your start (Key Vault secret read, subscription role you granted, resource action as a managed identity).
References
Azure IMDS & Managed Identity docs; AzureHound/BloodHound; MicroBurst; Entra privesc research.