Collected research

Exploiting Deserialisation in ASP.NET via ViewState

Soroush Dalili · soroush.me · 24 April 2019

ASP.NET signs and encrypts the __VIEWSTATE parameter using machineKey values, so when MAC validation is disabled or the validation and decryption keys leak, an attacker forges a ViewState carrying a serialisation gadget and executes code on the server. Covers a ysoserial.net plugin, legacy .NET behaviour, recovering the application path, __EVENTVALIDATION, and WAF evasion.

Record

Researcher

Soroush Dalili

Published by

soroush.me

Date

24 April 2019

Topic

Server

In the archive

• Collected in the 2019 research round

Related sources

• YSoSerial.Net ViewState plugin

Tags

• deserialization
• gadget-chain
• rce
• aspnet
• dotnet
• waf-bypass
• tooling
• csrf
• owasp-a01-2021
• owasp-a05-2021
• owasp-a08-2021

This page is the archive's own catalogue record. The research is the work of Soroush Dalili, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 11 August 2026.