Google's Mobile VRP Behind the Scenes with Kristoffer Blasiak (Hextree Podcast Ep.1)

Introduction

This tutorial explores the insights shared by Kristoffer Blasiak regarding Google's Mobile Vulnerability Rewards Program (VRP) as discussed in the Hextree Podcast. The aim is to provide actionable steps for anyone interested in participating in Android security research and bug bounty programs, highlighting key processes and opportunities.

Step 1: Understanding the Mobile VRP

• The Google Mobile Vulnerability Rewards Program incentivizes researchers to find and report vulnerabilities in Android.
• Familiarize yourself with the program rules by visiting the Google Mobile VRP Rules.
• Key aspects of the program include:
  • Eligibility criteria for submitting vulnerabilities.
  • Types of vulnerabilities that are rewarded.
  • The reward structure based on the severity of the reported bugs.

Step 2: Submitting a Bug Report

• When you identify a bug, follow these steps to submit your report:
  1. Document the vulnerability clearly, including:
     • Steps to reproduce the issue.
     • Impact assessment (what could happen if exploited).
     • Any relevant screenshots or code snippets.
  2. Submit your report through the designated platform provided by Google.
  3. Wait for a response from the Google team, who will assess and validate your submission.

Step 3: Exploring Bug Bounty Opportunities

• There are numerous Android app bug bounty opportunities available. Here’s how to start:
  • Research popular applications that offer bounties for vulnerabilities.
  • Use platforms like HackerOne or Bugcrowd to find active programs.
  • Prioritize applications with a history of rewarding researchers.

Step 4: Identifying Targets

• Kristoffer emphasizes that there is a vast scope for vulnerability research within Android. To identify targets:
  • Look for applications with large user bases or those that handle sensitive data.
  • Consider lesser-known apps that may have weaker security measures.
  • Review app update histories for recent changes that might introduce new vulnerabilities.

Step 5: Understanding the Side-Loading Threat Model

• Side-loading is the process of installing apps from sources other than the official app store. To understand this threat:
  • Recognize that side-loaded apps may bypass security features, making them more vulnerable.
  • Assess the security implications of side-loading for both users and developers.
  • Explore specific vulnerabilities that can arise from side-loading, such as malicious code injection.

Step 6: Distinguishing Between App Bugs and Web App Bugs

• Understand the differences between bugs in Android apps and web apps:
  • Android app bugs often relate to the device’s hardware and OS interactions.
  • Web app bugs may involve server-side vulnerabilities or client-side JS issues.
• Focus on the specific context of mobile applications when researching and reporting vulnerabilities.

Conclusion

Participating in Google's Mobile VRP offers a significant opportunity for those interested in Android security. By understanding the program, submitting thorough bug reports, exploring various bug bounty opportunities, and recognizing key threats, you can effectively contribute to improving Android security. Take the next step by familiarizing yourself with the rules, identifying potential targets, and starting your research journey in mobile security.