Security & Compliance

Code Auditing Guidelines: Detecting and Fixing Cross-Site Scripting (XSS) in custom themes in Your Shopify Monolith

Understanding XSS Vectors in Shopify Themes Shopify’s Liquid templating language, while powerful, presents unique challenges for preventing Cross-Site Scripting (XSS) vulnerabilities, especially within custom themes. Unlike server-side rendered applications where input sanitization is often centralized, Shopify themes rely heavily on client-side rendering and Liquid’s built-in filters. Attackers can exploit unescaped user-generated content or improperly handled […]

Code Auditing Guidelines: Detecting and Fixing Server-Side Request Forgery (SSRF) in webhook parsers in Your Python Monolith

Understanding SSRF in Webhook Parsers Server-Side Request Forgery (SSRF) is a critical vulnerability that allows an attacker to induce the server-side application to make HTTP requests to an arbitrary domain of the attacker’s choosing. In the context of webhook parsers within a Python monolith, this often arises when user-supplied data is used to construct URLs […]

An Auditor’s Checklist for Securing C++ Backends on OVH

I. C++ Application Hardening: Compile-Time and Runtime Defenses Securing C++ backends on OVH necessitates a multi-layered approach, starting at the compilation stage and extending through runtime configurations. This section details critical hardening techniques for C++ applications deployed on OVH infrastructure, focusing on mitigating common vulnerabilities. A. Compiler Flags for Enhanced Security Leveraging modern compiler features […]

Mitigating OWASP Top 10 Risks: Finding and Patching insecure memory deallocation leading to information disclosure in C++

Understanding the Vulnerability: Double Free and Use-After-Free in C++ One of the most insidious memory management bugs in C++ is the double free, which can lead to a use-after-free condition. This occurs when a piece of memory is deallocated more than once. The first `free()` or `delete` operation marks the memory as available. A subsequent […]

Preparing for PCI-DSS Compliance: Security Hardening in Laravel and Linode Infrastructures

Securing Laravel Applications for PCI-DSS Achieving and maintaining Payment Card Industry Data Security Standard (PCI-DSS) compliance is a critical undertaking for any organization handling cardholder data. For applications built on the Laravel framework, this involves a multi-layered approach to security, encompassing both application-level controls and underlying infrastructure hardening. This document outlines specific, actionable steps to […]

Preparing for PCI-DSS Compliance: Security Hardening in Perl and Google Cloud Infrastructures

Securing Perl Applications for PCI-DSS Achieving Payment Card Industry Data Security Standard (PCI-DSS) compliance requires a rigorous approach to application security, especially for legacy systems often written in Perl. This section details specific hardening techniques applicable to Perl codebases that handle sensitive cardholder data (CHD). Input Validation and Sanitization PCI-DSS Requirement 6.5 mandates protection against […]

Mitigating Broken Object Level Authorization (BOLA) in API gateway endpoints in Custom Python Implementations

Understanding BOLA in API Gateway Contexts Broken Object Level Authorization (BOLA) is a critical vulnerability where an attacker can access resources they are not authorized to view or modify. In the context of API Gateways, BOLA often manifests when an API endpoint, designed to operate on a specific resource identified by an ID, fails to […]

How We Audited a High-Traffic Magento 2 Enterprise Stack on Linode and Mitigated Race conditions during high-concurrency payment processing

Diagnosing High-Concurrency Payment Processing Bottlenecks Our engagement began with a critical issue reported by a high-traffic Magento 2 Enterprise e-commerce platform hosted on Linode: intermittent failures and significant delays during peak sales events, specifically impacting the payment processing gateway. The symptoms pointed towards race conditions and resource contention under high concurrency, leading to dropped transactions […]

Code Auditing Guidelines: Detecting and Fixing Broken Object Level Authorization (BOLA) in API gateway endpoints in Your Python Monolith

Understanding Broken Object Level Authorization (BOLA) in Python Monoliths Broken Object Level Authorization (BOLA) is a critical security vulnerability where an API endpoint allows a user to access or modify objects they are not authorized to interact with. In a Python monolith architecture, where API gateway endpoints often directly interact with business logic and data […]

Code Auditing Guidelines: Detecting and Fixing untrusted command injection in system utility scripts in Your Perl Monolith

Identifying Untrusted Input in System Utility Scripts Monolithic Perl applications, especially those that have evolved over years, often contain system utility scripts. These scripts frequently interact with the operating system by executing external commands. A common vulnerability arises when user-supplied input is directly incorporated into these commands without proper sanitization, leading to untrusted command injection. […]

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