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 Mandrill API Key leaked! What should I do?

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

The Mandrill API Key is a unique alphanumeric code that grants access to the Mandrill email delivery service, allowing developers to send transactional emails securely and efficiently.

When it comes to the Mandrill API Key, developers should understand its main use cases:

  • Authentication: The Mandrill API Key is used to authenticate and authorize requests made to the Mandrill API. It serves as a secret token that verifies the identity of the application or user accessing the Mandrill service.
  • Email Sending: One of the primary purposes of the Mandrill API Key is to facilitate the sending of transactional emails. Developers can use the key to integrate Mandrill's email delivery service into their applications, allowing them to send personalized and timely emails to users.
  • Tracking and Reporting: The Mandrill API Key enables developers to track the delivery and engagement metrics of the emails sent through Mandrill. By using the key, developers can access detailed reports on email performance, including delivery rates, open rates, and click-through rates.

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

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

  • Environment variables are not hard-coded in the codebase, reducing the risk of accidental exposure through version control or code sharing.
  • Environment variables are stored outside of the codebase, making it harder for attackers to access the sensitive information through code inspection or unauthorized access to the code repository.
  • Environment variables can be managed securely by the hosting platform or infrastructure, allowing for better control over who has access to the sensitive data.
  • Using environment variables also promotes the separation of configuration from code, enhancing the overall security posture of the application.

How to secure your secrets using environment variables

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

Using AWS Secrets Manager to manage Mandrill 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 Mandrill API Key from AWS Secrets Manager.

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

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

Using CyberArk Conjur to manage Mandrill 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 Mandrill API Key from CyberArk Conjur.

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How to generate a Mandrill API Key?

To generate a Mandrill API Key, developers can follow these steps:

  • Go to the Mandrill website and sign in to your account.
  • Click on the 'Settings' tab in the top menu.
  • Under the 'API Keys' section, click on the 'New API Key' button.
  • Give your API key a name to easily identify it.
  • Choose the permissions for the API key based on the actions you want to perform.
  • Click on the 'Create API Key' button to generate the key.

Once the key is generated, make sure to securely store it as it will be used to authenticate your requests to the Mandrill API.

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

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

  • Improper storage: If the API key is stored in plain text in code repositories or configuration files that are accessible to unauthorized users, it can be easily leaked.
  • Accidental exposure: Developers may inadvertently include the API key in error messages, logs, or other output that can be viewed by unauthorized individuals.
  • Weak access controls: If the API key is shared with too many individuals or stored in a location with lax security measures, it increases the risk of being leaked.
  • Phishing attacks: Hackers may use social engineering tactics to trick individuals into revealing their API keys through fraudulent emails or websites.

What are the risks of leaking a Mandrill API Key

As a security trainer, it's important to emphasize the risks associated with leaking a Mandrill API Key. Developers may not always be fully aware of the potential consequences, so it's crucial to educate them on the following points:

  • Data Breaches: Leaking a Mandrill API Key can lead to unauthorized access to sensitive data, potentially resulting in data breaches and exposing confidential information.
  • Unauthorized Access: A leaked API Key can be used by malicious actors to send unauthorized emails through the Mandrill platform, leading to spamming or phishing attacks.
  • Financial Loss: If an unauthorized party gains access to a Mandrill account using a leaked API Key, it could result in financial loss due to fraudulent activities or misuse of the account.
  • Reputation Damage: Security incidents resulting from a leaked API Key can damage the reputation of the organization, leading to loss of trust from customers and partners.

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Mandrill API Key security best practices

  • Avoid embedding the secret directly in your code. Instead, use environment variables or secrets managers‍
  • Secure storage: store the Mandrill 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 Mandrill API Key usage and improve the overall security of your Mandrill API Key implementations.

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

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Mandrill 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 Mandrill API Key was used by malicious actors

  • Review Access Logs: Check the access logs of your Mandrill 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 Mandrill API Key. This can give insights into any unauthorized use of your key.

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Steps to revoke the Mandrill API Key

Generate a new Mandrill API Key:

  • Log into your Mandrill 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 Mandrill 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 Mandrill 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
SHOW
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