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| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
Tainted data flows into a field annotated as [RegexTrusted], or into a regular expression.
This is very dangerous because could lead to exponential backtracking, infinite recursion, or untrusted behaviors (steal sensitive data, perform a privilege escalation, etc.).
Checks for this class use the CodeSonar C# taint analysis. See Taint Tracking for CodeSonar C# Warning Classes for more information on this analysis, including lists of the methods that CodeSonar automatically recognizes as relevant and information about specifying additional methods that CodeSonar should recognize as taint sources, sinks, or sanitizers.
Use configuration parameter CSHARP_ANALYSIS_ADVANCED_INJECTION to specify the level of checking to perform for this and other taint-related warning classes:
| クラス名 | Tainted Regular Expression (C#) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 日本語クラス名 | Tainted Regular Expression (C#) | |||||||||
| クラス分類 | セキュリティ (security) | |||||||||
| ニーモニック | CSHARP.IO.TAINT.REGEX | |||||||||
| カテゴリー |
|
|||||||||
| 対応言語 | C# で利用可能です。 |
|||||||||
| 有効/無効設定 | このワーニングクラスのチェックはデフォルトで有効になっています。チェックを無効にするにはプロジェクト設定ファイル
（configuration file）に以下の WARNING_FILTER ルールを追加してください。
WARNING_FILTER += discard class="Tainted Regular Expression (C#)" |
English (en)
using com.juliasoft.julia.checkers.injection;
using System;
using System.IO;
using System.Web;
using System.Web.UI;
using System.Text.RegularExpressions;
public class RegexInjection : Page
{
private string adminUserName;
public void ProcessRequest(HttpRequest request, HttpResponse response)
{
String user = request.Params["user"];
String data = request.Params["data"];
Regex rx = new Regex(user); // Tainted Regular Expression (C#) warning issued here
if(rx.IsMatch(adminUserName))
{
...
}
}
...
}
Verify that a security error actually corresponds to unconstrained information flow from source locations into sink locations. If this is the case, add a sanitizing algorithm to clean data before it flows into sinks, or use prepared statements for SQL queries rather than free queries built from string concatenation.
設定ファイルの以下のパラメータがこのワーニングクラスのチェックに影響します。