CA2356: Unsafe DataSet or DataTable type in web deserialized object graph
| Property | Value |
|---|---|
| Rule ID | CA2356 |
| Title | Unsafe DataSet or DataTable type in web deserialized object graph |
| Category | Security |
| Fix is breaking or non-breaking | Non-breaking |
| Enabled by default in .NET 8 | No |
Cause
A method with a System.Web.Services.WebMethodAttribute or System.ServiceModel.OperationContractAttribute has a parameter that may reference a DataSet or DataTable.
This rule uses a different approach to a similar rule, CA2355: Unsafe DataSet or DataTable in deserialized object graph and will find different warnings.
Rule description
When deserializing untrusted input and the deserialized object graph contains a DataSet or DataTable, an attacker can craft a malicious payload to perform a denial of service attack. There may be unknown remote code execution vulnerabilities.
For more information, see DataSet and DataTable security guidance.
How to fix violations
- If possible, use Entity Framework rather than DataSet and DataTable.
- Make the serialized data tamper-proof. After serialization, cryptographically sign the serialized data. Before deserialization, validate the cryptographic signature. Protect the cryptographic key from being disclosed and design for key rotations.
When to suppress warnings
It's safe to suppress a warning from this rule if:
- You know the input is trusted. Consider that your application's trust boundary and data flows may change over time.
- You've taken one of the precautions in How to fix violations.
Suppress a warning
If you just want to suppress a single violation, add preprocessor directives to your source file to disable and then re-enable the rule.
#pragma warning disable CA2356
// The code that's violating the rule is on this line.
#pragma warning restore CA2356
To disable the rule for a file, folder, or project, set its severity to none in the configuration file.
[*.{cs,vb}]
dotnet_diagnostic.CA2356.severity = none
For more information, see How to suppress code analysis warnings.
Pseudo-code examples
Violation
using System;
using System.Data;
using System.Web.Services;
[WebService(Namespace = "http://contoso.example.com/")]
public class MyService : WebService
{
[WebMethod]
public string MyWebMethod(DataTable dataTable)
{
return null;
}
}
Related rules
CA2350: Ensure DataTable.ReadXml()'s input is trusted
CA2351: Ensure DataSet.ReadXml()'s input is trusted
CA2353: Unsafe DataSet or DataTable in serializable type
CA2355: Unsafe DataSet or DataTable in deserialized object graph
