---
title: Lambda permission misconfigured
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: >-
  Docs > Datadog Security > Code Security > Infrastructure as Code (IaC)
  Security > IaC Security Rules > Lambda permission misconfigured
---

# Lambda permission misconfigured

{% callout %}
# Important note for users on the following Datadog sites: app.ddog-gov.com

{% alert level="danger" %}
This product is not supported for your selected [Datadog site](https://docs.datadoghq.com/getting_started/site.md). ().
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{% /callout %}

## Metadata{% #metadata %}

**Id:** `3ddf3417-424d-420d-8275-0724dc426520`

**Cloud Provider:** AWS

**Platform:** Ansible

**Severity:** Low

**Category:** Best Practices

#### Learn More{% #learn-more %}

- [Provider Reference](https://docs.ansible.com/ansible/latest/collections/amazon/aws/lambda_policy_module.html)

### Description{% #description %}

Lambda permission statements must set the action to `lambda:InvokeFunction` so callers are limited to invoking the function and cannot receive broader or unintended Lambda privileges.

Check Ansible tasks that use the `amazon.aws.lambda_policy` or `lambda_policy` modules. The `action` property must be defined and set to the exact string `lambda:InvokeFunction`. Tasks missing the `action` property or using any other value (for example `lambda:*`, a different Lambda action, or an empty value) are flagged because they can over-privilege callers or result in misconfigured access.

Secure example with the action explicitly set:

```yaml
- name: Allow S3 to invoke my Lambda
  amazon.aws.lambda_policy:
    name: my_lambda_policy
    state: present
    principal: s3.amazonaws.com
    action: lambda:InvokeFunction
    function_name: my-function
```

## Compliant Code Examples{% #compliant-code-examples %}

```yaml
- name: Lambda S3 notification negative
  amazon.aws.lambda_policy:
    state: present
    function_name: functionName
    alias: Dev
    statement_id: lambda-s3-myBucket-create-data-log
    action: lambda:InvokeFunction
    principal: s3.amazonaws.com
    source_arn: arn:aws:s3:eu-central-1:123456789012:bucketName
    source_account: 123456789012
```

## Non-Compliant Code Examples{% #non-compliant-code-examples %}

```yaml
- name: Lambda S3 notification positive
  amazon.aws.lambda_policy:
    state: present
    function_name: functionName
    alias: Dev
    statement_id: lambda-s3-myBucket-create-data-log
    action: lambda:CreateFunction
    principal: s3.amazonaws.com
    source_arn: arn:aws:s3:eu-central-1:123456789012:bucketName
    source_account: 123456789012
```