ASP.NET ViewState Integrity Check

Anandhu Krishnan

Published on

13 May 2024

Vulnerability

Description

The application lacks a Message Authentication Code (MAC) to protect the integrity of the ASP.NET ViewState, making it vulnerable to tampering by malicious clients. This could lead to unauthorized data manipulation or execution of arbitrary code. To mitigate this risk, enable MAC protection and use encryption to secure the ViewState, ensuring data integrity and confidentiality.

Recommendation

To prevent tampering with ASP.NET ViewStates, implement a MAC on the server-side using a secure algorithm and a secret key. By default, modern ASP.NET installations have this configuration enabled; however, it may be overridden programmatically or through the ASP.NET configuration.

Automated human-like penetration testing for your web apps & APIs

Teams using Beagle Security are set up in minutes, embrace release-based CI/CD security testing and save up to 65% with timely remediation of vulnerabilities. Sign up for a free account to see what it can do for you.

Product tour

Written by