Vengala Vinay

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Security & Compliance

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

Initial Stack Assessment: Shopify Enterprise on Linode Our engagement began with a deep dive into a high-traffic Shopify Enterprise deployment hosted on Linode. The stack was a complex, multi-layered system designed for peak performance and availability. Key components included: Frontend: A custom-built React application served via a CDN, with dynamic content fetched from the backend. […]

Mitigating OWASP Top 10 Risks: Finding and Patching Broken Object Level Authorization (BOLA) in API gateway endpoints in Laravel

Understanding Broken Object Level Authorization (BOLA) in APIs Broken Object Level Authorization (BOLA), also known as Insecure Direct Object References (IDOR) in API contexts, is a critical vulnerability where an API endpoint allows a user to access or manipulate objects they are not authorized to. This often occurs when an API endpoint directly exposes identifiers […]

How We Audited a High-Traffic Magento 2 Enterprise Stack on AWS and Mitigated XML External Entity (XXE) injection in old SOAP integrations

Initial Stack Assessment and Threat Landscape Our engagement began with a deep dive into a high-traffic Magento 2 Enterprise Edition stack hosted on AWS. The primary concern was a recent security audit that flagged potential XML External Entity (XXE) injection vulnerabilities, specifically within legacy SOAP integrations. These integrations, often developed years prior and maintained by […]

An Auditor’s Checklist for Securing Laravel Backends on AWS

AWS IAM: Principle of Least Privilege for Laravel Applications A fundamental tenet of secure cloud deployments is adhering to the principle of least privilege. For Laravel applications hosted on AWS, this translates to meticulously configuring Identity and Access Management (IAM) roles and policies. Avoid using overly permissive policies like AdministratorAccess. Instead, create granular policies that […]

How We Audited a High-Traffic Perl Enterprise Stack on DigitalOcean and Mitigated Remote Code Execution (RCE) via eval block syntax flaws

Initial Reconnaissance and Vulnerability Hypothesis Our engagement began with a high-level overview of the client’s infrastructure, hosted on DigitalOcean. The core application was a Perl-based enterprise system handling significant traffic, with a legacy codebase exhibiting common signs of technical debt. Our primary concern, given the nature of Perl’s dynamic capabilities, was the potential for Remote […]

An Auditor’s Checklist for Securing WooCommerce Backends on OVH

OVH Instance Hardening for WooCommerce Backends Securing a WooCommerce backend hosted on an OVH instance requires a multi-layered approach, focusing on both the underlying infrastructure and the application itself. This checklist assumes a standard Debian/Ubuntu-based OVH Public Cloud instance running a LAMP/LEMP stack. We’ll cover OS-level hardening, network security, and specific WooCommerce considerations. 1. SSH […]

How We Audited a High-Traffic PHP Enterprise Stack on Linode and Mitigated Remote Code Execution (RCE) via insecure file uploads

Initial Reconnaissance and Attack Vector Identification Our engagement began with a deep dive into the application’s architecture and its exposed attack surface. The client, a high-traffic e-commerce platform hosted on Linode, reported intermittent performance issues and suspected a security breach. The primary concern was a recent feature allowing users to upload product images and associated […]

Code Auditing Guidelines: Detecting and Fixing Insecure Deserialization in legacy session handling in Your Ruby Monolith

Identifying Legacy Session Handling Mechanisms Many legacy Ruby monoliths, particularly those built on older versions of Rails or custom frameworks, often rely on serialized session data stored in formats like YAML or Marshal. The primary vulnerability here stems from the deserialization process itself. If an attacker can control the serialized data that gets deserialized, they […]

How We Audited a High-Traffic Ruby Enterprise Stack on Linode and Mitigated Insecure Deserialization in legacy session handling

Initial Stack Assessment and Threat Modeling Our engagement began with a deep dive into the existing infrastructure. The core application was a Ruby on Rails monolith, serving a high-traffic enterprise client. The deployment was managed on Linode, utilizing a combination of managed databases and custom-built services. The primary concern was the legacy session handling mechanism, […]

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