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 Buildkite Agent Token leaked! What should I do?

What is a Buildkite Agent Token and how it is used?

A Buildkite Agent Token is a unique identifier used to authenticate and authorize a Buildkite agent to communicate with the Buildkite platform. It is essential for securely managing and controlling access to the Buildkite infrastructure.

When it comes to secret management practices, developers must understand the main use cases of the Buildkite Agent Token:

  • Authentication: The Buildkite Agent Token is used to authenticate the Buildkite agent with the Buildkite service, allowing the agent to communicate securely and perform tasks on behalf of the user or organization.
  • Authorization: The token is also used to authorize the agent to access specific resources and perform certain actions within the Buildkite environment, ensuring that only authorized actions are carried out.
  • Secure Communication: The token plays a crucial role in establishing secure communication between the Buildkite agent and the Buildkite service, helping to protect sensitive information and prevent unauthorized access to resources.

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1. Code snippets to prevent Buildkite Agent Token hardcoding using environment variables

Using environment variables for storing sensitive information like Buildkite Agent Token is considered secure because:

  • Environment variables are not hardcoded in the codebase, reducing the risk of accidental exposure.
  • Environment variables can be easily managed and rotated without changing the code.
  • Environment variables are not stored in the version control system, adding an extra layer of security.
  • Access to environment variables can be restricted based on user roles and permissions.

How to secure your secrets using environment variables

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2. Code snippet to prevent Buildkite Agent Token hardcoding using AWS Secrets Manager

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

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3. Code snippet to prevent Buildkite Agent Token hardcoding using HashiCorp Vault

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

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

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How to generate a Buildkite Agent Token?

To generate a Buildkite Agent Token, follow these steps:

  1. Login to your Buildkite account
  2. Go to the Agents section in the Buildkite dashboard
  3. Click on the "New Access Token" button
  4. Enter a name for the token and select the scopes you want to grant
  5. Click on the "Create" button to generate the token

Once the token is generated, make sure to securely store it as it will be used by the Buildkite agent to authenticate and communicate with the Buildkite server.

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My Buildkite Agent Token leaked, what are the possible reasons?

There are several reasons why a Buildkite Agent Token might have been leaked:

  • Improper storage: Storing the token in plaintext in a public repository or on a shared drive can lead to accidental exposure.
  • Hardcoding: Hardcoding the token directly into the source code or configuration files increases the risk of it being leaked.
  • Logging: If the token is inadvertently logged in application logs, it can be accessed by unauthorized individuals.
  • Third-party integrations: Integrating with third-party services that may inadvertently expose the token can also lead to leaks.
  • Human error: Mistakes such as inadvertently sharing the token in communication channels or misconfiguring access controls can result in leaks.

What are the risks of leaking a Buildkite Agent Token

As a security trainer for developers, it is crucial to understand the risks associated with leaking a Buildkite Agent Token. The Buildkite Agent Token is a sensitive piece of information that, if exposed, can lead to serious security breaches and compromises. It is important to educate developers on the potential consequences of mishandling this token to ensure the security of their applications and data.

  • Unauthorized access: If a Buildkite Agent Token is leaked, unauthorized individuals may gain access to the Buildkite infrastructure, allowing them to view, modify, or delete sensitive data.
  • Resource abuse: Attackers with access to a leaked token can abuse Buildkite resources, potentially leading to increased costs, disruptions in service, or even complete system compromise.
  • Data breaches: Leaked tokens can be used to access confidential data stored within Buildkite, putting sensitive information at risk of exposure and exploitation.
  • Reputation damage: A security incident resulting from a leaked Buildkite Agent Token can tarnish the reputation of developers and their organizations, leading to loss of trust from customers and partners.

By understanding these risks and implementing proper secret management and detection practices, developers can mitigate the threat of leaking a Buildkite Agent Token and protect their systems from potential security vulnerabilities.

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Buildkite Agent Token security best practices

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

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

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Buildkite Agent 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 Buildkite Agent Token was used by malicious actors

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

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Steps to revoke the Buildkite Agent Token

Generate a new Buildkite Agent Token:

  • Log into your Buildkite Agent 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 Buildkite Agent 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 Buildkite Agent 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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