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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C#

CSHARP.CRYPTO.WIV : Weak Initialization Vector Value (C#)

要旨

A weak, possibly reversible initialization vector is passed as a parameter.

Some cryptography algorithms are nowadays considered as outdated and unsafe or actually broken, since they are too easy to decode. This checker identifies uses of unsafe algorithms for cryptography.

プロパティ

クラス名 Weak Initialization Vector Value (C#)
日本語クラス名 Weak Initialization Vector Value (C#)
クラス分類 セキュリティ (security)
ニーモニック CSHARP.CRYPTO.WIV
カテゴリー
CWE CWE:1204 Generation of Weak Initialization Vector (IV)
OWASP-2017 OWASP-2017:A2 Broken authentication
OWASP-2021 OWASP-2021:A2 Cryptographic failures
  OWASP-2021:A7 Identification and authorization failures
OWASP-2025 OWASP-2025:A04 Cryptographic Failures
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="Weak Initialization Vector Value (C#)"

例 

using System.Security.Cryptography;

namespace TestNameSpace
{
    class MyClass
    {
        public static ICryptoTransform CreateEncryptor(SymmetricAlgorithm alg, byte[] key) {
            return alg.CreateEncryptor(key, new byte[2] { 0, 2 }); // 'Weak Initialization Vector Value (C#)'
                                                                   // warning issued here
        }
    }
}

解決法

Generate a secure random Initialization Vector.

関連のある設定ファイルパラメータ

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。

 

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