đź“… Webinar - Delivering Security on Your Terms: An Intro to Self-Hosted

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đź“… Webinar - Delivering Security on Your Terms: An Intro to Self-Hosted

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My MailChimp API Key leaked! What should I do?

What is a MailChimp API Key and how it is used?

An API key for MailChimp is a unique identifier that allows developers to authenticate and access MailChimp's API services for sending emails, managing lists, and analyzing campaigns.

When using the MailChimp API Key, developers should be aware of the following main use cases:

  • Accessing MailChimp API: The API Key is used to authenticate and authorize access to MailChimp's API, allowing developers to interact with MailChimp's services programmatically.
  • Managing Mailing Lists: Developers can use the API Key to manage mailing lists, including creating, updating, and deleting lists, as well as adding and removing subscribers.
  • Tracking Campaign Performance: The API Key enables developers to retrieve data on campaign performance, such as open rates, click-through rates, and subscriber engagement, for analysis and reporting purposes.

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1. Code snippets to prevent MailChimp API Key hardcoding using environment variables

Using environment variables for storing sensitive information like API keys, such as the MailChimp API Key, is a secure practice for several reasons:

  • Environment variables are not hard-coded in the codebase, making it less likely for the API key to be exposed accidentally through version control systems or code sharing.
  • Environment variables are stored outside of the application code, providing an additional layer of security as they are not directly accessible to someone who gains access to the codebase.
  • Environment variables can be managed and controlled separately from the code, allowing for easier rotation and updating of API keys without having to modify the code itself.

How to secure your secrets using environment variables

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2. Code snippet to prevent MailChimp API Key hardcoding using AWS Secrets Manager

Using AWS Secrets Manager to manage MailChimp API Keys is a secure way to handle sensitive data. Here are code snippets in five different programming languages that demonstrate how to retrieve the MailChimp API Key from AWS Secrets Manager.

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3. Code snippet to prevent MailChimp API Key hardcoding using HashiCorp Vault

Using HashiCorp Vault for managing MailChimp API Keys is a great way to enhance security. Here are code snippets in five different programming languages for securely handling a MailChimp API Key using HashiCorp Vault.

Remember to replace the VAULT_ADDR and VAULT_TOKEN with your Vault server address and authentication token. The snippets assume that the MailChimp API Key is stored under the api_key field within Vault. The specifics of the Vault path and field names should be adjusted to match your Vault setup.

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4. Code snippet to prevent MailChimp API Key hardcoding using CyberArk Conjur

Using CyberArk Conjur to manage MailChimp API Key is a secure way to handle sensitive data. Here are code snippets in five different programming languages that demonstrate how to retrieve the MailChimp API Key from CyberArk Conjur.

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How to generate a MailChimp API Key?

To generate a MailChimp API Key, follow these steps:

  1. Log in to your MailChimp account.
  2. Click on your profile name and select "Account" from the dropdown menu.
  3. Go to the "Extras" menu and click on "API keys."
  4. Scroll down to the "Your API keys" section and click on the "Create A Key" button.
  5. Your new API key will be generated. Copy and securely store it for use in your applications.

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My MailChimp API Key leaked, what are the possible reasons?

There are several reasons why a MailChimp API Key might have been leaked:

  • 1. Insecure storage: If the API key is stored in a plaintext file or hardcoded in the source code, it can be easily accessed by unauthorized individuals.
  • 2. Weak access controls: If the API key is shared with too many people or stored in a repository with lax access controls, it increases the risk of it being leaked.
  • 3. Phishing attacks: Developers or team members may fall victim to phishing attacks that trick them into revealing sensitive information like API keys.
  • 4. Unintentional exposure: Developers may accidentally expose API keys in public forums, code snippets, or documentation.
  • 5. Lack of monitoring: Without proper monitoring and detection mechanisms in place, it may take a while before a leaked API key is identified and revoked.

What are the risks of leaking a MailChimp API Key

Leaking a MailChimp API Key can pose serious risks to the security of your application and the data it handles. Here are some specific risks associated with exposing a MailChimp API Key:

  • Data Breach: An exposed API Key can potentially allow unauthorized access to your MailChimp account, leading to a data breach. This could result in sensitive information being exposed or manipulated.
  • Unauthorized Access: Hackers or malicious actors can use a leaked API Key to gain unauthorized access to your MailChimp account. They may exploit this access to send spam emails, steal subscriber information, or disrupt your email marketing campaigns.
  • Financial Loss: If attackers gain access to your MailChimp account using the leaked API Key, they could misuse your account to send large volumes of emails, resulting in additional charges to your account. This can lead to unexpected financial losses.
  • Reputation Damage: A data breach or misuse of your MailChimp account due to a leaked API Key can tarnish your organization's reputation. Customers may lose trust in your brand if their personal information is compromised or if they receive spam emails from your account.

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MailChimp API Key security best practices

  • Avoid embedding the secret directly in your code. Instead, use environment variables or secrets managers‍
  • Secure storage: store the MailChimp API Key in a secure location, such as a password manager or a secrets management service.
  • Regular rotation: periodically rotate the API key to minimize the risk of long-term exposure.
  • Restrict permissions: apply the principle of least privilege by only granting the key the minimum necessary permissions.
  • Monitor usage: regularly check the usage logs for any unusual activity or unauthorized access attempts.
  • Implement access controls: limit the number of users who have access to the secret and enforce strong authentication measures.
  • Use a secrets manager: utilize secret management tools like CyberArk or AWS Secrets Manager for enhanced security.

By adhering to the best practices, you can significantly reduce the risk associated with MailChimp API Key usage and improve the overall security of your MailChimp API Key implementations.

Exposing secrets on GitHub: What to do after leaking Credential and API keys

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MailChimp API Key leak remediation: what to do

What to do if you expose a secret: How to stay calm and respond to an incident [cheat sheet included]

How to check if MailChimp API Key was used by malicious actors

  • Review Access Logs: Check the access logs of your MailChimp API Key account for any unauthorized access or unusual activity. Pay particular attention to access from unfamiliar IP addresses (if you haven’t set up a specific allow list) or at odd hours.
  • Monitor Usage Patterns: Look for anomalies in the usage patterns, such as unexpected spikes in data access or transfer.
  • Check Active Connections and Operations: Review the list of active connections and recent operations on your database. Unusual or unauthorized operations might indicate malicious use.
  • Audit API Usage: If possible, audit the usage of your API key through any logging or monitoring services you have integrated with MailChimp API Key. This can give insights into any unauthorized use of your key.

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Steps to revoke the MailChimp API Key

Generate a new MailChimp API Key:

  • Log into your MailChimp API Key account.
  • Navigate to the API section and generate a new API key.

Update Services with the new key:

  • Replace the compromised key with the new key in all your services that use this API key.
  • Ensure all your applications and services are updated with the new key before deactivating the old one.

Deactivate the old MailChimp API Key:

  • Once the new key is in place and everything is functioning correctly, deactivate the old API key.
  • This can typically be done from the same section where you generated the new key.

Monitor after key rotation:

  • After deactivating the old key, monitor your systems closely to ensure that all services are running smoothly and that there are no unauthorized access attempts.

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How to understand which services will stop working

  • Inventory of services: keep an inventory of all services and applications that utilize your MailChimp API Key.
  • Communication and documentation: Ensure that your team is aware of which services are dependent on the key. Maintain documentation for quick reference.
  • Testing: before deactivating the old key, test your services with the new key in a staging environment. This helps in identifying any services that might face issues post rotation.
  • Fallback strategies: Have a fallback or emergency plan in case a critical service fails after the key rotation. This might include temporary measures or quick rollback procedures.

In summary, the remediation process involves identifying potential misuse, carefully rotating the key, and ensuring minimal disruption to services. Being proactive and having a well-documented process can greatly reduce the risks associated with a compromised API key.

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What about other secrets?

GitGuardian helps developers keep 350+ types of secrets out of source code. GitGuardian’s automated secrets detection and remediation solution secure every step of the development lifecycle, from code to cloud:

  • On developer workstations with git hooks (pre-commit and pre-push);
  • On code sharing platforms like GitHub, GitLab, and Bitbucket;
  • In CI environments (Circle CI, Travis CI, Jenkins CI, GitHub Actions, and many more);
  • In Docker images.

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Environment Variables
Environment Variables
Environment Variables

charge

nullable string

For card errors, the ID of the failed charge.

payment_method_type

nullable string

If the error is specific to the type of payment method, the payment method type that had a problem. This field is only populated for invoice-related errors.

doc_url

nullable string

A URL to more information about the error code reported.

request_log_url

nullable string

A URL to the request log entry in your dashboard.

charge

nullable string

If the error is specific to the type of payment method, the payment method type that had a problem. This field is only populated for invoice-related errors.

Hide
Show
child attributes

type

enum

For some errors that could be handled programmatically, a short string indicating the error code reported.

charge

nullable string

If the error is specific to the type of payment method, the payment method type that had a problem. This field is only populated for invoice-related errors.

Hide
Show
child attributes

type

enum

For some errors that could be handled programmatically, a short string indicating the error code reported.

payment_intent

nullable object

The PaymentIntent object for errors returned on a request involving a PaymentIntent.

setup_intent

nullable object

The SetupIntent object for errors returned on a request involving a SetupIntent.

Hide
Show
child attributes

type

enum

For some errors that could be handled programmatically, a short string indicating the error code reported.

Hide
Show
child attributes

type

enum

For some errors that could be handled programmatically, a short string indicating the error code reported.

CLIENT LIBRARIES

$ gem install stripe
$ pip install stripe
$ composer require stripe/stripe-php
MAVEN
<dependency>
  <groupId>com.stripe</groupId>
  <artifactId>stripe-java</artifactId>
  <version>24.16.0</version>
</dependency>

GRADLE
compile "com.stripe:stripe-java:24.16.0"
$ npm install --save stripe
$ go get github.com/stripe/stripe-go/v76
$ nuget install Stripe.net
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