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 Linode Personal Access Token leaked! What should I do?

What is a Linode Personal Access Token and how it is used?

A Linode Personal Access Token is a unique string of characters that allows users to authenticate their identity and access resources on the Linode cloud platform securely.

When it comes to using Linode Personal Access Token, developers should keep in mind the following main use cases:

  • Authentication: Linode Personal Access Token is used to authenticate and authorize API requests made to the Linode platform on behalf of the developer or application.
  • Automated Tasks: Developers can use the token to automate tasks such as provisioning and managing Linode resources, deploying applications, and monitoring infrastructure.
  • Integration: The token can be integrated into CI/CD pipelines, scripts, and other tools to interact with Linode services programmatically and securely.

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1. Code snippets to prevent Linode Personal Access Token hardcoding using environment variables

Using environment variables for storing sensitive information like Linode Personal Access Token in your code is considered secure for the following reasons:

  • Environment variables are not hard-coded in your codebase, reducing the risk of accidental exposure through version control systems or code sharing.
  • Environment variables are stored outside of your application code, making it more difficult for attackers to access them directly.
  • Environment variables can be easily managed and updated without having to modify the code, providing flexibility and reducing the chances of secrets being leaked during code changes.
  • Environment variables can be encrypted or obfuscated by the hosting platform, adding an extra layer of security to the stored secrets.

How to secure your secrets using environment variables

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2. Code snippet to prevent Linode Personal Access Token hardcoding using AWS Secrets Manager

Using AWS Secrets Manager to manage Linode Personal Access Tokens is a secure way to handle sensitive data. Here are code snippets in five different programming languages that demonstrate how to retrieve the Linode Personal Access Token from AWS Secrets Manager.

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3. Code snippet to prevent Linode Personal Access Token hardcoding using HashiCorp Vault

Using HashiCorp Vault for managing Linode Personal Access Tokens is a great way to enhance security. Here are code snippets in five different programming languages for securely handling a Linode Personal Access Token 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 Linode Personal Access Token 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 Linode Personal Access Token hardcoding using CyberArk Conjur

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

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How to generate a Linode Personal Access Token?

To generate a Linode Personal Access Token, follow these steps:

  1. Log in to your Linode account.
  2. Click on your profile icon in the top right corner and select "My Profile".
  3. Under the "Access Tokens" section, click on the "Add a Personal Access Token" button.
  4. Enter a label for your token to easily identify it.
  5. Choose the scopes for the token based on the permissions you want to grant.
  6. Click on the "Create Token" button to generate the Personal Access Token.

Make sure to copy and securely store the token as it will not be shown again for security reasons. You can use this token to authenticate your API requests to Linode services.

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My Linode Personal Access Token leaked, what are the possible reasons?

There are several reasons why a Linode Personal Access Token might have been leaked:

  • Improper storage: If the token is stored in a publicly accessible location or in a version control system without proper access controls, it can be easily accessed by unauthorized parties.
  • Weak security practices: Developers may inadvertently expose the token by including it in code snippets shared online, leaving it in log files, or storing it in plaintext files on their local machines.
  • Phishing attacks: Hackers may use social engineering tactics to trick developers into revealing their access tokens through phishing emails or fake websites.
  • Compromised systems: If a developer's system or Linode account is compromised, attackers can gain access to the access token stored on that system.

What are the risks of leaking a Linode Personal Access Token

As a security trainer, it is crucial for developers to understand the risks associated with leaking a Linode Personal Access Token. This token is a sensitive piece of information that, if exposed, can lead to serious security breaches and unauthorized access to your Linode account.

  • Unauthorized Access: If a malicious actor obtains your Linode Personal Access Token, they can gain unauthorized access to your account, potentially compromising your data and resources.
  • Data Breaches: Leaking your access token can result in data breaches, where sensitive information stored on your Linode account may be exposed or manipulated.
  • Financial Loss: Attackers could use your access token to deploy expensive resources on your account, leading to financial loss for you or your organization.
  • Reputation Damage: A security incident resulting from a leaked access token can damage your reputation as a developer or your organization's reputation, leading to loss of trust from clients and users.

Therefore, it is essential to follow best practices for secret management and detection to prevent the leakage of sensitive information like Linode Personal Access Tokens. Developers should be vigilant in safeguarding their access tokens and regularly monitor for any unauthorized access or suspicious activities.

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Linode Personal Access Token security best practices

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

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

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Linode Personal Access Token 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 Linode Personal Access Token was used by malicious actors

  • Review Access Logs: Check the access logs of your Linode Personal Access Token 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 Linode Personal Access Token. This can give insights into any unauthorized use of your key.

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Steps to revoke the Linode Personal Access Token

Generate a new Linode Personal Access Token:

  • Log into your Linode Personal Access Token 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 Linode Personal Access Token:

  • 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 Linode Personal Access Token.
  • 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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