Mitigation Strategies Analysis for akhikhl/gretty

Mitigation Strategy: Explicit Network Binding

Description:
1. Locate Gretty Configuration: Open the build.gradle (or build.gradle.kts) file.
2. Find the gretty Block: Locate the gretty { ... } configuration block.
3. Set httpAddress: Within the gretty block, add or modify the httpAddress property. Set it to '127.0.0.1' (localhost) or a trusted internal IP. Do not use '0.0.0.0'.
```
gretty {
    httpAddress = '127.0.0.1'
    // other configurations...
}
```
4. Restart Gretty: Restart the Gretty server.
5. Verify: Use netstat to confirm the listening address.
Threats Mitigated:
- Accidental Exposure of Development Environment: (Severity: High) - Prevents external access.
- Unintentional exposure of .gradle or build artifacts: (Severity: Medium) - Reduces the attack surface.
Impact:
- Accidental Exposure of Development Environment: Risk significantly reduced (local access only).
- Unintentional exposure of .gradle or build artifacts: Risk moderately reduced (harder to access).
Currently Implemented:
- Yes/No/Partially: (Specify one)
- Location: build.gradle, gretty block.
Missing Implementation:
- If "No" or "Partially", specify where it's missing or incorrect (e.g., "Set to 0.0.0.0", "Not configured").

Description:
1. Create Separate Configuration Files: Create distinct files (e.g., jetty-web-dev.xml, jetty-web-prod.xml).
2. Use configFile in Gretty: In build.gradle, use the configFile property within the appropriate Gretty task (e.g., appRun, farmRun) to specify the correct file for each environment.
```
appRun {
    configFile = file('src/main/webapp/WEB-INF/jetty-web-dev.xml')
}
farmRun { // Or a different task for production
    configFile = file('src/main/webapp/WEB-INF/jetty-web-prod.xml')
}
```
3. Avoid Default Configurations: Do not rely on Gretty's default loading. Always specify the file explicitly.
4. Review Configuration Files: Ensure each file contains only appropriate settings for its environment.
Threats Mitigated:
- Inadvertent Deployment of Development Configurations: (Severity: High) - Prevents dev settings in production.
Impact:
- Inadvertent Deployment of Development Configurations: Risk significantly reduced (correct file loaded).
Currently Implemented:
- Yes/No/Partially: (Specify one)
- Location: build.gradle, Gretty task configurations, and separate configuration files.
Missing Implementation:
- If "No" or "Partially", describe what's missing (e.g., "Same file for all environments", "Not using configFile").

Description:
1. Locate Gretty Configuration: Open build.gradle.
2. Find the gretty Block: Locate gretty { ... }.
3. Set servletContainer: Add or modify the servletContainer property. Set it to a specific, recent version (e.g., 'jetty9.4', 'tomcat9'). Do not rely on the default.
```
gretty {
    servletContainer = 'jetty9.4' // Be specific and up-to-date!
    // other configurations...
}
```
4. Check for Compatibility: Ensure the version is compatible.
5. Update Regularly: Reconsider the version during dependency updates.
Threats Mitigated:
- Dependency Vulnerabilities (Indirect): (Severity: Variable) - Prevents using a vulnerable default.
Impact:
- Dependency Vulnerabilities (Indirect): Risk reduced (controlled container version).
Currently Implemented:
- Yes/No/Partially: (Specify one)
- Location: build.gradle, gretty block.
Missing Implementation:
- If "No" or "Partially", describe what's missing (e.g., "Not specifying servletContainer", "Outdated version").

Description:
1. Determine if Required: Assess if your application needs the Security Manager.
2. Create a Security Policy File: Create a file (e.g., security.policy) defining permissions.
3. Enable in Gretty/JVM: Add JVM arguments in build.gradle within the jvmArgs property of a Gretty task:
```
appRun {
    jvmArgs = [
        '-Djava.security.manager',
        '-Djava.security.policy=src/main/resources/security.policy'
    ]
}
```
4. Test Extensively: Test with the Security Manager enabled.
5. Iterative Refinement: Start restrictive, add permissions as needed.
Threats Mitigated:
- Overriding Security Managers: (Severity: High) - Enforces access control.
- Various Code-Level Vulnerabilities: (Severity: Variable) - Restricts code actions.
Impact:
- Overriding Security Managers: Risk eliminated (if configured correctly).
- Various Code-Level Vulnerabilities: Risk significantly reduced.
Currently Implemented:
- Yes/No/Partially: (Specify one)
- Location: build.gradle (JVM arguments), and a security policy file.
Missing Implementation:
- If "No" or "Partially", describe what's missing (e.g., "Not enabled", "Policy file missing", "Overly permissive policy").

Description:
1. Identify Web Root: Determine the directory Gretty serves.
2. Review Contents: Ensure it only contains files to be served.
3. Remove Sensitive Files: Remove .gradle, build, source code, etc.
4. Configure webappDir (If Necessary): Customize the web root:
```
gretty {
    webappDir = file('src/main/my-custom-webapp')
    // other configurations...
}
```
5. Verify: Try to access files that should not be accessible.
Threats Mitigated:
- Unintentional exposure of .gradle or build artifacts: (Severity: Medium) - Prevents serving sensitive files.
Impact:
- Unintentional exposure of .gradle or build artifacts: Risk significantly reduced.
Currently Implemented:
- Yes/No/Partially: (Specify one)
- Location: build.gradle (webappDir property), and web root contents.
Missing Implementation:
- If "No" or "Partially", describe what's missing (e.g., ".gradle in web root", "Sensitive files present").