terraform.lang.security.iam.no-iam-admin-privileges.no-iam-admin-privileges
semgrep
Author
unknown
Download Count*
License
IAM policies that allow full "-" admin privileges violates the principle of least privilege. This allows an attacker to take full control over all AWS account resources. Instead, give each user more fine-grained control with only the privileges they need. $TYPE
Run Locally
Run in CI
Defintion
rules:
- id: no-iam-admin-privileges
pattern-either:
- patterns:
- pattern-inside: |
resource $TYPE "..." {
...
policy = jsonencode({
...
Statement = [
...
]
...
})
...
}
- pattern-not-inside: |
resource $TYPE "..." {
...
policy = jsonencode({
...
Statement = [
...,
{... Effect = "Deny" ...},
...
]
...
})
...
}
- patterns:
- pattern: |
{..., Action = "*", ...}
- pattern: |
{..., Resource = "*", ...}
- metavariable-pattern:
metavariable: $TYPE
pattern-either:
- pattern: |
"aws_iam_role_policy"
- pattern: |
"aws_iam_policy"
- pattern: |
"aws_iam_user_policy"
- pattern: |
"aws_iam_group_policy"
- patterns:
- pattern-inside: |
data aws_iam_policy_document "..." {
...
statement {
...
}
...
}
- pattern-not-inside: |
data aws_iam_policy_document "..." {
...
statement {
...
effect = "Deny"
...
}
...
}
- patterns:
- pattern: |
{..., resources = ["*"], ...}
- pattern: |
{..., actions = ["*"], ...}
message: IAM policies that allow full "*-*" admin privileges violates the
principle of least privilege. This allows an attacker to take full control
over all AWS account resources. Instead, give each user more fine-grained
control with only the privileges they need. $TYPE
metadata:
references:
- https://github.com/bridgecrewio/checkov/blob/master/checkov/terraform/checks/data/aws/AdminPolicyDocument.py
category: security
cwe:
- "CWE-269: Improper Privilege Management"
license: Commons Clause License Condition v1.0[LGPL-2.1-only]
technology:
- terraform
- aws
owasp:
- A04:2021 - Insecure Design
subcategory:
- audit
likelihood: LOW
impact: LOW
confidence: LOW
vulnerability_class:
- Improper Authorization
languages:
- hcl
severity: WARNING
Examples
no-iam-admin-privileges.tf
resource "aws_iam_user_policy" "lb_ro" {
name = "test"
user = aws_iam_user.lb.name
# Terraform's "jsonencode" function converts a
# Terraform expression result to valid JSON syntax.
policy = jsonencode({
Version = "2012-10-17"
Statement = [
{
# ok: no-iam-admin-privileges
Action = [
"ec2:Describe*",
]
Effect = "Allow"
Resource = "*"
},
]
})
}
data aws_iam_policy_document "policy" {
statement {
# ok: no-iam-admin-privileges
actions = ["*"]
principals {
type = "AWS"
identifiers = ["*"]
}
effect = "Deny"
resources = ["*"]
}
}
resource "aws_iam_user_policy" "policy" {
name = "test_policy"
path = "/"
description = "My test policy"
# Terraform's "jsonencode" function converts a
# Terraform expression result to valid JSON syntax.
policy = jsonencode({
Version = "2012-10-17"
Statement = [
{
#ok: no-iam-admin-privileges
Resource = "*"
Action = "*"
Effect = "Deny"
},
]
})
}
resource "aws_iam_policy" "policy" {
name = "test_policy"
path = "/"
description = "My test policy"
# Terraform's "jsonencode" function converts a
# Terraform expression result to valid JSON syntax.
policy = jsonencode({
Version = "2012-10-17"
Statement = [
#ruleid: no-iam-admin-privileges
{
Resource = "*"
Action = "*"
},
]
})
}
resource "aws_iam_policy" "policy" {
name = "test_policy"
path = "/"
description = "My test policy"
# Terraform's "jsonencode" function converts a
# Terraform expression result to valid JSON syntax.
policy = jsonencode({
Version = "2012-10-17"
Statement = [
#ruleid: no-iam-admin-privileges
{
Action = "*"
Effect = "Allow"
Resource = "*"
},
]
})
}
data aws_iam_policy_document "policy" {
#ruleid: no-iam-admin-privileges
statement {
resources = ["*"]
actions = ["*"]
principals {
type = "AWS"
identifiers = ["*"]
}
}
}
Short Link: https://sg.run/oY0N