Hello readers! If you are looking forward to build an impenetrable web application, you need to do the best penetration testing of your system. You might feel that everything is perfect with your system security. But one tiny security loophole might welcome hackers at your doorstop making your system and sensitive business information vulnerable. This is why you need to know your bet in the ‘Source Code Review vs VAPT’ aspect.
But the answer is not as simple as you think. When it comes to the ‘Source Code Review vs VAPT’, there is no obvious winner or choice. Each of them comes with its security strengths and weaknesses that you need to know beforehand.
What is Source Code Review?
This is an inside-out method that tests the source code of a web application to identify its security loopholes, logic errors, and other mistakes overlooked during its development phase.
The source code review can be compared to proofreading a manuscript before its final publication. An automated code analyser and security expert check the source code of the application line by line. If and when a potential issue gets flagged, a human expert comes forward to resolve the problem in the best way possible.
Source code review is also known as SAST (Static Application Security Testing) and secure code review.
What are the Strengths?
The strengths of source code review lie in its ability to find security vulnerabilities early during a web application’s development life cycle.
Source code review turns out to be very efficient in the detection of weaknesses in the early stages of the software development life cycle (SDLC). Its main advantages are:
Early Detection
In terms of saving both time and cost, early detection is of great importance since fixing bugs during the coding stage is much cheaper than dealing with an exploited vulnerability in a live application.
100% Coverage
An automated tool is able to scan the entire codebase, leaving nothing unchecked.
Identification of Complex Bugs
This approach proves highly efficient for detecting encryption problems (including the usage of hardcoded passwords or weak encryption algorithms), buffer overflows, race conditions (unsafe simultaneous operations), and lack of input validation resulting in XSS.
Developer Training
Feedback to the developers is another advantage of the tool.
At the same time, source code reviews have some drawbacks, as they do not allow testing the operation of the application after its deployment and handling environment-related misconfiguration issues.
What is VAPT?
VAPT stands for Vulnerability Assessment and Penetration Testing.
Source code review can be likened to going through the manuscript, whereas penetration testing is attempting to break into the bookstore to get the manuscript.
Penetration testing refers to the act of conducting active attacks on a live network or application in order to identify the flaws that exist. In conducting a pen test, the tester will try to replicate the tactics, techniques,s and procedures (TTPs) used by the actual adversary.
It entails several phases including reconnaissance, scanning, gaining access, maintaining access, and finally analysis. The simulation of real-world attacks enables the tester to learn how an attacker can circumvent the security controls in place in order to gain sensitive data from the application. This can take different forms, including a complete Active Directory penetration testing service.
In order to know more about VAPT, you can check this out.
What are the Strengths?
The major advantage of pen testing is the practical approach and risk-oriented mindset that it offers. Rather than getting a laundry list of technical vulnerabilities that may or may not be exploitable, pen testing gives you solid evidence of exploitations.
Proof of Exploitability
In addition to identifying vulnerabilities, it provides you with proof of exploitability in case a vulnerability is identified.
Identification of Runtime and Configuration Flaws
There are some vulnerabilities that cannot be exploited without the program running in a production environment. Pen testing is great at discovering search engine index leaks, broken authentication features, and configuration flaws of the server infrastructure.
Compliance with Security Requirements
Many compliance standards require regular security assessment procedures to be conducted. An annual pen test is a must if you process credit card information under PCI DSS.
Specific Attack Scenarios
The testers adjust their attacks according to the specific business logic of your application. If you have an eCommerce solution, they will attempt to attack your cart prices.
While seeking penetration testing services, you will find some differences in scope. Some organizations choose to have PTaaS, continuous penetration testing as a service, to meet their agile development requirements, while other organizations invite the penetration test service during their yearly large-scale auditing.
Cost Considerations
The key to comparing the cost of penetration testing vs. source code review is to know how each one scales.
Source Code Review: Source code review is typically billed according to the number of lines of code in the application being analyzed and the language(s) of those code lines. It takes specialized analysts who know specific frameworks.
VAPT: On the other hand, penetration testing services are usually billed according to the complexity of the task and the time involved. While a simple web application may take just a few days, a complex enterprise infrastructure that needs mobile app pentesting services and internal network pivoting will take many weeks.
In the end, the Shift Left approach, where you perform source code review in the beginning, will lower your total cost of remediation. But choosing a credible penetration testing provider will save you from the costly repercussions of a cyber attack in production.
Source Code Review vs VAPT: The Core Difference
Penetration testing is a simulation of a true attack. The tester attacks the running application without access to the code and attempts to penetrate, escalate permissions, get access to sensitive information, and document their success. It provides an answer to a business question: what can the attacker do to our system right now?
Code review is a reverse process. The reviewer looks at the code in detail, sees how the data flows, finds vulnerable parts, and checks the logic of the application's security. It provides a completely different answer to the business question: what vulnerabilities are present in our application and why?
Neither method is a superset of the other. Penetration testing can miss a vulnerable spot that gets hit very rarely. Code review can raise a problem that does not exist in practice.
What Each One Does Well?
Some problem categories are much more easily discovered from one perspective than another.
Source Code Review Excels at:
Hardcoded Secrets: Passwords, API keys, and secret keys embedded in the code that is not visible externally but resides in the source code repository.
Root Cause and Code Path Problems: Security issues associated with branches, exceptions, and edge cases that are not reproducible externally but are detectable internally.
Insecure Third-Party Libraries: Third-party libraries and transitively dependent vulnerabilities brought in through your build process.
Cryptography and Data Management: Poor or homemade crypto and data handling, bad key storage, and writing sensitive data to the logs.
Fixes that Developers Can Apply Immediately: Since the reviewer knows exactly what code is involved and where in the source tree, the fix is targeted: "Replace this code with this code."
VAPT Performs Best at:
Exploitation: It’s not just an assessment of whether there is a vulnerability, but also of the impact that follows.
Misconfiguration and Misenvironment Vulnerabilities: Vulnerabilities in the stack, infrastructure, and runtime that do not show up in the application code.
Chained Exploits: Building a single exploit out of multiple weaknesses, just like a malicious attacker.
Exploiting Business Logic in Action: Not just seeing if there is a possible exploit in a workflow, but validating it.
The price of each depends on the scope and not a set rate per exploit — learn more about pentest pricing.
Which One Should You Go for?
Select according to your needs and the stage of your development cycle.
Go for a source code review when you need thoroughness and root-cause analysis, you have the ability to provide tester access to the repository, and when you require fixes actionable by your developers. This review is perfect during development and prior to a significant release.
Go for a penetration test when you need an understanding of your vulnerabilities in the real world from your live system, when a customer or regulatory mandate requires it, or you need to validate a near-production release.
Do both when the application is highly sensitive or valuable. The common pattern is a white box code review of the code in progress followed by a pentest of the near-final build - the code review will strip out weaknesses in the code, while the pentest validates the working system.
Depending upon agreed scope, the exercise may be performed using recognized methodologies and findings communicated clearly; see our methodology for a process overview.
Conclusion
Application security needs to be done using more than one technique. It isn't just about weaknesses in the application; sometimes attackers can use insecure configurations and workflow issues, as well as vulnerabilities that become visible when the application is actually running.
Therefore, Source Code Review vs VAPT isn't about fighting a war, where one technique beats another. Source code reviews give in-depth knowledge of the application and allow finding the reasons for vulnerabilities. VAPT checks how the actual attack surface behaves and how vulnerabilities can harm the business.
The most efficient technique would include both of them, applied at the correct stages of the lifecycle.
This way, organizations can create better applications while minimizing their risk of attacks and protecting their clients and reputation.
FAQs (Frequently Asked Questions)
Q1. What is the core difference between Source Code Review and VAPT?
The former reviews code itself, while the latter checks vulnerabilities and exploits on an operating system.
Q2. Is source code review better than VAPT?
No, neither is superior since they detect different kinds of vulnerabilities.
Q3. Can VAPT detect coding issues?
Yes, but it is limited to coding vulnerabilities that lead to exploitable weaknesses in the running software.
Q4. Do companies need to employ ‘Source Code Review vs VAPT’?
Yes, since using both approaches gives more profound insight into source code and testing of its operation.
Q5. When should one conduct a source code review?
One should conduct it during the development period, before a new version release, and at times when there have been changes to vital applications.