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 Stripe Secret Key leaked! What should I do?

What is a Stripe Secret Key and how it is used?

The Stripe Secret Key is a unique authentication credential used by developers to securely interact with the Stripe API and access sensitive information related to payment processing.

Developers should understand the main use cases for the Stripe Secret Key:

  • Securely authenticate API requests: The Stripe Secret Key is used to authenticate and verify the identity of the application making requests to the Stripe API. This ensures that only authorized applications can access and interact with Stripe's services.
  • Encrypt sensitive data: Developers can use the Stripe Secret Key to encrypt sensitive data such as payment information before sending it to Stripe for processing. This helps protect the data from unauthorized access and ensures compliance with data protection regulations.
  • Manage webhooks and notifications: The Stripe Secret Key is also used to verify the authenticity of incoming webhooks and notifications from Stripe. By validating these messages with the Secret Key, developers can ensure that the data received is from a trusted source and take appropriate actions based on the information.

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1. Code snippets to prevent Stripe Secret Key hardcoding using environment variables

Using environment variables for storing sensitive information like Stripe Secret Keys is a secure practice because:

  • Environment variables are not hard-coded in the codebase, making it less likely for them to be exposed in case of a breach.
  • Environment variables are stored outside of the code repository, reducing the risk of accidental exposure.
  • Environment variables can be easily managed and rotated without changing the code, enhancing security maintenance.

How to secure your secrets using environment variables

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2. Code snippet to prevent Stripe Secret Key hardcoding using AWS Secrets Manager

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

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3. Code snippet to prevent Stripe Secret Key hardcoding using HashiCorp Vault

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

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

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How to generate a Stripe Secret Key?

To generate a Stripe Secret Key, developers need to follow these steps:

  1. Log in to the Stripe Dashboard.
  2. Go to the Developers section and select API keys.
  3. Under the "Standard keys" section, click on the "Create secret key" button.
  4. A new secret key will be generated. Copy this key and securely store it for use in your application.

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My Stripe Secret Key leaked, what are the possible reasons?

There are several reasons why a Stripe Secret Key might have been leaked:

  • Weak security practices: If developers store the Stripe Secret Key in an insecure location or hardcode it in their code, it can easily be leaked.
  • Unintentional exposure: Developers may accidentally include the Stripe Secret Key in code repositories or configuration files that are publicly accessible.
  • Phishing attacks: Hackers may use phishing techniques to trick developers into revealing their Stripe Secret Key unknowingly.
  • Insufficient access controls: If developers do not properly restrict access to the Stripe Secret Key within their organization, it can be leaked to unauthorized parties.

What are the risks of leaking a Stripe Secret Key

As a security trainer, it is crucial to educate developers on the risks associated with leaking a Stripe Secret Key. The Stripe Secret Key is a sensitive piece of information that, if exposed, can lead to serious security vulnerabilities and financial losses. Here are some specific risks of leaking a Stripe Secret Key:

  • Unauthorized Transactions: An attacker who gains access to your Stripe Secret Key can make unauthorized transactions on your behalf, leading to financial losses.
  • Data Breach: Leaking a Stripe Secret Key can result in a data breach, exposing sensitive customer information and damaging your reputation.
  • Fraudulent Activities: With access to your Stripe Secret Key, malicious actors can engage in fraudulent activities, such as creating fake accounts or making illegitimate purchases.
  • Legal Consequences: In some cases, failing to protect sensitive information like a Stripe Secret Key can lead to legal repercussions, fines, and lawsuits.

It is essential for developers to understand the importance of safeguarding their Stripe Secret Key and implementing robust security measures to prevent unauthorized access. By following best practices in secret management and detection, developers can mitigate the risks associated with leaking sensitive information like a Stripe Secret Key.

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Stripe Secret Key security best practices

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

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

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Stripe Secret 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 Stripe Secret Key was used by malicious actors

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

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Steps to revoke the Stripe Secret Key

Generate a new Stripe Secret Key:

  • Log into your Stripe Secret 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 Stripe Secret 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 Stripe Secret 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
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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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