PORT SWIGGER (Business Logic Vulnerabilities)
Business logic vulnerabilities refer to errors in the planning and development of an application that can be exploited to carry out malicious actions. These errors often occur due to a lack of consideration for unusual circumstances, making the application prone to attacks.
It can be challenging to identify logic flaws, but an attacker can take advantage of the application’s unconventional actions to exploit the user. In business logic, it is crucial to have rules and constraints in place to make sure that the application operates consistently and logically.
HOW DO THESE VULNERABILITIES ARISE???
Business logic vulnerabilities occur when the design and development teams presume how users will use the application, leading to insufficient validation of user input. This can be exploited by attackers using an intercepting proxy. The security features of the application are unable to detect and react to unforeseen circumstances, putting user data at risk of being compromised.
Logic flaws are common in complex systems that even the development team doesn’t fully understand. To prevent these flaws, developers need to have a comprehensive understanding of the entire application and how different functions can interact unexpectedly.
In large code bases, developers may not fully understand all areas of the application, leading to flawed assumptions and unintentional logic flaws. Without documenting these assumptions, vulnerabilities can easily be introduced into the application.
What is the impact of business logic vulnerabilities?
Business logic vulnerabilities can have varying levels of impact, but any unintended behavior can be taken advantage of by attackers to cause significant problems. As a result, it is important to address any illogical or difficult-to-understand logic, even if it has not been exploited yet.
There is always a possibility that someone else will be able to exploit it. A flaw in the authentication process could let attackers access sensitive data or functions. Businesses can suffer significant financial losses due to flawed logic in their transactions.
While logic flaws may not enable an attacker to accomplish specific objectives, they can still enable a malicious entity to harm the business in some manner.
The Logic behind Logical Flaws Let’s Find out!!
There are occasions when hacking can be more profitable than it currently is, leading criminals to constantly search for methods to infiltrate your database. When there are similarities between business ideas, there is a higher chance of identifying weaknesses in the business’s reasoning.
Hackers are increasingly seeking out business logic paradoxes to exploit, as this allows them to avoid detection from automated scanning systems. Web applications can be at risk of unauthorized access to their business logic, but many companies are unaware of these vulnerabilities unless they experience financial losses.
These applications manage and regulate various aspects of online financial transactions, such as deals, discounts, refunds, and shipping fees. Time-related application logic is responsible for determining how web applications manage user sessions and timeouts. Process-related application logic uses internal-facing applications for managing human resources, procurement, warehousing, and other processes.
Examples of logic flaws include:
Excessive trust in client-side controls Failing to handle unconventional input Making flawed assumptions about user behavior Domain-specific flaws Providing an encryption oracle
NOW WE ARE PROCEEDING WITH LABS TO UNDERSTAND THEM BETTER!!!!!
Lab: Excessive trust in client-side controls
Lab: 2FA broken logic
Lab: Inconsistent security controls
Lab: Flawed enforcement of business rules
Lab: Low-level logic flaw
Lab: Inconsistent handling of exceptional input
Lab: Weak isolation on dual-use endpoint
Lab: Insufficient workflow validation
Lab: Authentication bypass via flawed state machine
Lab: Infinite money logic flaw
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