User with privilege escalation by actions 'iam:UpdateLoginProfile'

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Metadata

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

Provider: AWS

Platform: Terraform

Severity: Medium

Category: Access Control

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Description

Allowing a user the iam:UpdateLoginProfile permission with the Resource set to "*" in Terraform, as in the following example, enables that user to change the passwords of any IAM user in the AWS account:

Action = [
  "iam:UpdateLoginProfile",
]
Resource = "*"

This creates a privilege escalation risk, as the user could assign themselves or others passwords to high-privilege accounts, resulting in unauthorized access or control over critical resources. If left unaddressed, this misconfiguration can lead to account compromise and the potential for significant security incidents.

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:UpdateLoginProfile",
        ]
        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]
}