We provide security updates for the following versions:

The D-Bus Client Java team takes security seriously. If you discover a security vulnerability, please report it to us responsibly.

Please do NOT report security vulnerabilities through public GitHub issues.

Instead, please send an email to devdev@lucimber.com with the following information:

• A description of the vulnerability
• Steps to reproduce the issue
• Potential impact assessment
• Any suggested fixes (if available)

Please include as much information as possible to help us understand and reproduce the issue:

1. Vulnerability Type: What type of security issue is this? (e.g., authentication bypass, code injection, etc.)
2. Affected Components: Which parts of the library are affected?
3. Attack Vector: How can this vulnerability be exploited?
4. Impact: What is the potential impact if exploited?
5. Proof of Concept: A minimal example demonstrating the vulnerability
6. Environment: Java version, operating system, D-Bus version
7. Suggested Fix: If you have ideas for fixing the issue

We aim to respond to security reports within the following timeframes:

• Initial Response: Within 48 hours
• Triage and Assessment: Within 1 week
• Fix Development: Within 2-4 weeks (depending on complexity)
• Public Disclosure: After fix is released and users have had time to update

1. Verification: We verify and reproduce the reported vulnerability
2. Assessment: We assess the impact and severity
3. Fix Development: We develop and test a fix
4. Security Advisory: We prepare a security advisory
5. Release: We release the fix in a new version
6. Disclosure: We publicly disclose the vulnerability details

We follow a coordinated disclosure process:

• We will work with you to understand the issue
• We will keep you informed of our progress
• We will credit you in the security advisory (if desired)
• We ask that you do not publicly disclose the issue until we have released a fix

When using the D-Bus Client Java library:

1. Keep Updated: Always use the latest version with security fixes
2. Input Validation: Validate all input from D-Bus messages
3. Authentication: Use appropriate D-Bus authentication mechanisms
4. Network Security: Secure your D-Bus connections appropriately
5. Error Handling: Don't expose sensitive information in error messages

When contributing to the project:

1. Secure Coding: Follow secure coding practices
2. Input Validation: Validate all input parameters
3. Authentication: Implement proper authentication checks
4. Error Handling: Handle errors securely without information leakage
5. Testing: Include security test cases

The library supports multiple SASL authentication mechanisms:

• EXTERNAL: Uses system credentials (Unix domain sockets)
• DBUS_COOKIE_SHA1: Uses cookie-based authentication (TCP connections)

Always verify that the authentication mechanism is appropriate for your use case.

The library performs extensive validation of D-Bus messages:

• Type signature validation
• Message format validation
• Bounds checking for all data types
• UTF-8 validation for strings

• Unix Domain Sockets: Secure by default on local systems
• TCP Connections: Consider additional security measures for network connections
• TLS: Currently not supported natively, consider network-level encryption

The library is designed with thread safety in mind:

• Immutable Message Objects: All message objects are immutable
• Thread Isolation: Clear separation between transport and application threads
• Concurrent Access: Safe concurrent access to connection objects

• Bounds Checking: All array and buffer operations are bounds-checked
• Resource Management: Proper cleanup of resources and connections
• Memory Leaks: Comprehensive testing for memory leaks

• Fail-Safe Defaults: Default to secure configurations
• Exception Safety: Proper exception handling without information leakage
• Logging: Secure logging without exposing sensitive information

We consider the following types of vulnerabilities:

• Remote code execution
• Authentication bypass
• Privilege escalation
• Information disclosure (sensitive data)

• Denial of service
• Information disclosure (non-sensitive data)
• Input validation bypasses
• Memory corruption

• Information leakage in error messages
• Timing attacks
• Resource exhaustion

The project uses several security tools:

• CodeQL: Static analysis for security vulnerabilities
• Dependabot: Automated dependency vulnerability scanning
• PMD: Static code analysis including security rules
• JaCoCo: Code coverage to ensure security tests are comprehensive

For security-related questions or concerns:

• Email: devdev@lucimber.com
• GPG Key: Available on request
• Response Time: 48 hours for initial response

We thank the security researchers who have responsibly disclosed vulnerabilities to us. Contributors to our security will be acknowledged in release notes unless they prefer to remain anonymous.

This security policy is provided under the same Apache 2.0 license as the rest of the project. By reporting security vulnerabilities, you agree to our coordinated disclosure process.