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العربيةPut inline group policy
Can write an inline admin policy onto a group and promote its members.
Grants escalation on its own.
iam:PutGroupPolicyOn its own, iam:PutGroupPolicy can write an inline admin policy onto a group and promote its members. On a wide resource scope that alone reaches administrator access.
Why it is dangerous
A principal can call iam:PutGroupPolicy to write an inline policy onto the group, instantly granting that permission set to every member of the group, including the principal if it belongs to the group. A full-admin inline policy promotes all members at once and persists until removed.
In MITRE ATT&CK terms this maps to T1098.003, Account Manipulation: Additional Cloud Roles, under the privilege escalation tactic. AWS records it in CloudTrail as PutGroupPolicy. The call shows up in CloudTrail but blends into normal administration, so it needs a rule to stand out. It also gives an attacker a way to keep access after the first foothold is closed, so it is worth watching even when it looks like routine administration.
Detection
PutGroupPolicyPrerequisites
Source principal is (or can join) the target group.
Tactic
Privilege Escalation
A control that would remove it: Remove iam:PutGroupPolicy from the principal.
Whether to apply it depends on how the permission is used in your environment, so it is a business decision rather than an automatic fix. The same permission can be load-bearing in one account and pure risk in another.
Pathbreak confirms whether this path resolves in your account, ranks it against the others by how much it opens up, and uses your threat model and business context to show which paths are worth cutting.
Questions
What does iam:PutGroupPolicy allow?
Can write an inline admin policy onto a group and promote its members.
Can iam:PutGroupPolicy escalate privileges on its own?
Yes. Held on a broad enough resource it reaches administrator access with no other permission.
How is put inline group policy detected?
Watch for PutGroupPolicy in CloudTrail. The call shows up in CloudTrail but blends into normal administration, so it needs a rule to stand out.
How do you break this path?
A control that would remove it is: Remove iam:PutGroupPolicy from the principal. Whether to apply it depends on how the permission is used in your account, so it is a business decision rather than an automatic fix.
Which MITRE ATT&CK technique is this?
T1098.003, Account Manipulation: Additional Cloud Roles, under the privilege escalation tactic.
Related paths
References
Find this in your own account
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