OWASP API Top 10 Explained: Unrestricted Access to Sensitive Business Flows

Unrestricted Access to Sensitive Business Flows occurs when attackers or bots exploit a business process to disrupt its normal functioning. These processes can include selling a product, defining hours of operation, or managing IT ticketing systems. A prime example of this vulnerability is ticket scalping, where tickets for popular events are bought out immediately and resold at inflated prices on other platforms.

This vulnerability is relevant to APIs, as they must be able to detect and secure against various threats, including attacks from hackers, machines, and other APIs in a B2B context.

To detect and prevent unrestricted access, several measures can be taken. Human detection, monitoring IP addresses, implementing proper authorization processes, and analyzing user patterns are necessary for protection. For instance, a suspicious pattern could be identified if a user rapidly adds items to their cart in seconds and makes a purchase without typical browsing behavior. Most humans would take time to make a decision.?

Vendors can offer solutions to detect and defend against these patterns, alerting businesses of potentially malicious activities. Their expertise not only helps identify vulnerable areas but also provides the necessary defenses to secure business flows. Leveraging external assistance, while maintaining it internally, can be instrumental in discovering, detecting, and defending against threats like Unrestricted Access to Sensitive Business Flows.

In conclusion, Unrestricted Access to Sensitive Business Flows is a serious threat, as illustrated by ticket scalping. Strong API security measures, including human detection and pattern analysis, are essential.

This is the 6th blog post in a 10-part series on the OWASP API Security Top 10.

Below are links to the prior posts:

API1: Broken Object Level Authorization

API2: Broken Authentication

API3: Broken Object Property Level Authorization (Excessive Data Exposure + Mass Assignment)

API4: Unrestricted Resource Consumption

API5: BFLA

Mike Nickel

Information Security Professional

11 个月

Shmoocon :(

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