User with privilege escalation by actions 'iam:CreatePolicyVersion'

이 제품은 선택한 Datadog 사이트에서 지원되지 않습니다. ().
이 페이지는 아직 한국어로 제공되지 않습니다. 번역 작업 중입니다.
현재 번역 프로젝트에 대한 질문이나 피드백이 있으신 경우 언제든지 연락주시기 바랍니다.

Metadata

Id: terraform-aws-user-with-privilege-escalation-by-actions-iam-createpolicyversion

Provider: AWS

Platform: Terraform

Severity: Medium

Category: Access Control

Learn More

Description

Allowing a user the iam:CreatePolicyVersion action with the resource set to "*" in Terraform, as shown in the policy statement below, enables them to update any IAM policy in the AWS account. This privilege can be exploited for privilege escalation, as the user could create a new policy version attaching elevated permissions to themselves or others.

policy = jsonencode({
  Version = "2012-10-17"
  Statement = [
    {
      Action = [
        "iam:CreatePolicyVersion",
      ]
      Effect   = "Allow"
      Resource = "*"
    },
  ]
})

If left unaddressed, this misconfiguration could allow an attacker to gain unauthorized administrative access or perform malicious actions across your AWS environment by changing permissions on any IAM policy.

Compliant Code Examples

resource "aws_iam_user" "cosmic2" {
  name = "cosmic2"
}

resource "aws_iam_user_policy" "inline_policy_run_instances2" {
  name = "inline_policy_run_instances"
  user = aws_iam_user.cosmic2.name

  policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action = [
          "ec2:Describe*",
        ]
        Effect   = "Allow"
        Resource = "*"
      },
    ]
  })
}

Non-Compliant Code Examples

resource "aws_iam_user" "cosmic" {
  name = "cosmic"
}

resource "aws_iam_user_policy" "test_inline_policy" {
  name = "test_inline_policy"
  user = aws_iam_user.cosmic.name

  policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Action = [
          "iam:CreatePolicyVersion",
        ]
        Effect   = "Allow"
        Resource = "*"
      },
    ]
  })
}


resource "aws_iam_policy_attachment" "test-attach" {
  name       = "test-attachment"
  users      = [aws_iam_user.cosmic.name]
  roles      = [aws_iam_role.role.name]
  groups     = [aws_iam_group.group.name]
}