01Introduction
In the cloud, identity is the perimeter. A single role with a wildcard policy can turn one compromised Lambda function into access to every bucket in the account, and large estates have thousands of roles nobody remembers creating.
02What is CIEM?
Cloud infrastructure entitlement management (CIEM) is a category of tools that inventory human and machine identities across cloud accounts, calculate their effective permissions, and reduce them toward least privilege.
It complements CSPM, which checks how resources are configured, by answering who and what can act on them. CIEM is a core component of CNAPP and the cloud expression of zero trust.
03How CIEM works
CIEM turns scattered policies into an effective-permission map.
- 1.
Discover identities
Enumerate users, roles, service accounts, federated identities and workload identities across AWS, Google Cloud, Azure and Oracle Cloud.
- 2.
Resolve effective access
Combine identity policies, resource policies, permission boundaries and trust relationships into what each identity can actually do.
- 3.
Compare with usage
Flag permissions that are granted but never exercised, and roles that nobody assumes.
- 4.
Right-size
Recommend or apply narrower policies, ideally as code so the fix survives the next deploy.
04Threats and risks
Entitlement risk grows quietly with every new service.
Wildcard policies
Actions or resources set to * so a feature ships faster, then never narrowed.
Cross-account trust
Roles that any principal in a partner or legacy account can assume.
Privilege escalation
Permissions such as iam:PassRole or the ability to edit policies that let an identity grant itself more.
Standing machine credentials
Long-lived access keys for workloads, often the same keys caught by secrets detection.
05How Parameter helps
Parameter Cloud Security treats identity as the connective tissue of an attack path.
Permissions in context
Agents trace which data and services an over-permissioned role actually reaches, chaining IAM trust with network exposure.
Ranked by reach
A broad role that touches nothing sensitive ranks below a narrow one that reaches your customer database.
Least privilege as code
Each fix is a Terraform pull request that narrows the policy. See auto remediation.
