Top 10 winner

Bypassing .NET Serialization Binders

A .NET SerializationBinder that validates type names as strings, or returns null when it cannot resolve one, can be bypassed: BinaryFormatter then falls back to its own resolver. An assembly-qualified name parsed differently by binder and runtime restores blocked gadget types, giving remote code execution in DevExpress (CVE-2022-28684) and Exchange (CVE-2022-23277).

In the archive

• Ranked #5 in the 2022 Top 10 Web Hacking Techniques

Tags

• deserialization
• gadget-chain
• filter-bypass
• parser-differential
• rce
• dotnet
• cve
• case-study
• owasp-a05-2021
• owasp-a08-2021

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