Ensure that Trusted Policy Roles which can be assumed by external entities include a Condition String

Risk Level: High
Cloud Entity: IAM Role
CloudGuard Rule ID: D9.AWS.IAM.61
Covered by Spectral: Yes
Category: Security, Identity, & Compliance

GSL LOGIC

IamRole should not have assumeRolePolicy.Statement contain-any [ Action='sts:AssumeRole' and Effect = 'Allow' and Principal.AWS regexMatch /(root)|(user)/ and (Condition.StringEquals isEmpty() and Condition.StringLike isEmpty())]

REMEDIATION

Please ensure to include a Condition String to the Role Trust Policy.
Ref: https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_iam-condition-keys.html

IAM Role

An IAM role is similar to a user, in that it is an AWS identity with permission policies that determine what the identity can and cannot do in AWS. However, instead of being uniquely associated with one person, a role is intended to be assumable by anyone who needs it. Also, a role does not have standard long-term credentials (password or access keys) associated with it. Instead, if a user assumes a role, temporary security credentials are created dynamically and provided to the user.

Compliance Frameworks

• AWS CloudGuard Best Practices
• AWS ITSG-33
• AWS MITRE ATT&CK Framework v10
• AWS MITRE ATT&CK Framework v11
• AWS NIST 800-53 Rev 5
• AWS Risk Management
• AWS Security Risk Management