What is Thick Client Application Security?

Thick client penetration testing involves both local and server-side processing and often uses proprietary protocols for communication. Simple automated assessment scanning is not sufficient and testing thick client applications requires a lot of patience and a methodical approach. Moreover, the process often requires specialized tools and custom testing setup.

Why Thick Client Security Testing is Required?

Many thick client applications don’t undergo rigorous analysis. However, these applications can contain serious security problems, including memory corruption vulnerabilities, injection vulnerabilities, cryptographic weaknesses, and client-side trust issues. Such vulnerabilities can lead to a complete compromise of systems where the thick client software is installed, unauthorized access to server-side information, and more.


  • Pre-Engagement

    In this section we will discuss about timelines, scoping, location, time of the day to test and other such requirement to start the assessment

  • Study the Application

    As a part of thick client application security, our security testers understand application Architecture and Identifying the Languages and Frameworks Used. A thorough understanding of the thick client app helps testers go beyond the normal use cases the application was designed for and helps them think like attackers

  • Vulnerability Analysis

    Penetration testing is the process of discovering flaws in Client-Side and Server-Side attacks which can be leveraged by an attacker. Once the potential threats are identified a test plan is created to exploit the identified threats.

    Client side Analysis – We analyze the thick client software itself using a variety of tools. Depending on the specific software and attacks of concern. Activities may include performing memory dumps, testing IPC channels that may permit privilege escalation, fuzzing file inputs, and in-depth reverse engineering.

    Server side Analysis – Most thick clients access some server-side functionality, and the successful exploit of a vulnerability in server-side code can affect all thick clients or central data stores. We analyze the server software using various manual and automated tools during this phase.

  • Solutions and Fixes

    Once vulnerabilities are found with our controlled security testing tools, each vulnerability is ranked based on the threat it poses for the business and not just a universal rank. Our experts also provide remediation guidance, so your developers can fix these vulnerabilities sooner and stay focused on product.

  • Report

    Provide recommendation and conduct debrief of identified vulnerabilities

  • Revalidation

    Once the reported vulnerabilities are addressed, we will conduct another round of testing to confirm the fixes of identified issues.




Open Web Application Security Project

Benefits For Your Organization

  • Meeting compliance expectations like ISO 27001, PCI: DSS, HIPAA, CCPA, GDPR etc.
  • Prevent the modification of existing data from unauthorized external sources
  • Build trust and confidence with customers
  • Prevent financial loss due to security breaches
  • Identify known security exposures before attackers find them.
  • Prevention in loss of reputation resulting from any security incidents