Blazor WebAssembly Detection Scanner
This scanner detects the use of Blazor WebAssembly in digital assets. It identifies instances where Blazor WebAssembly applications are deployed, offering insights into the technology stack used.
Short Info
Level
Single Scan
Single Scan
Can be used by
Asset Owner
Estimated Time
10 seconds
Time Interval
13 days 13 hours
Scan only one
URL
Toolbox
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Blazor WebAssembly is a framework used to build interactive web applications using .NET. It is widely used by developers to create modern web applications with WebAssembly, allowing for a high-performance user experience. Organizations across various sectors, including retail, finance, and healthcare, utilize Blazor WebAssembly for building sophisticated UIs in web environments. The ease of use, powerful tooling, and ability to use existing .NET libraries make it a popular choice. With the capability to run C# code directly in the browser, Blazor WebAssembly eliminates the need for JavaScript. Its applications are often found on platforms supporting complex interactions and seamless user experiences.
Detected involves identifying the presence of Blazor WebAssembly technology on web servers. It revolves around understanding that certain configurations may expose metadata about the technology stack. Detection of this technology can reveal the use of specific frameworks, potentially giving attackers insights into vulnerabilities that might be exploited based on known issues with that technology. The implications of this detection include profiling web infrastructure which could be targeted in more elaborate attacks. Simply detecting technology isn't harmful in itself, but it provides insight into what security measures may need to be considered.
Technical details for this detection focus on identifying specific resources loaded by Blazor WebAssembly applications. The template checks for the presence of "blazor.boot.json" files, which are key to the WebAssembly bootstrapping process. It then verifies that these files contain markers like 'dotnet.wasm', 'entryAssembly', and 'Microsoft.JSInterop.WebAssembly.dll'. These specific elements are unique to Blazor WebAssembly, and their presence confirms the usage of the technology. Additional status checks ensure that legitimate applications respond with a 200 HTTP status code.
If vulnerabilities associated with using Blazor WebAssembly are exploited, it could lead to various issues. These include unauthorized access, data exposure, or even injection attacks if other vulnerabilities within applications exist. Attackers can also prepare for future advanced attacks based on the technology profile gleaned from initial detection. Knowing the use of specific frameworks can guide attackers in crafting exploits that leverage known vulnerabilities in those frameworks. The security implications could range from minor information leaks to significant security breaches depending on the application's additional security controls.
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