added all ctfs

ir0nstone/ret2win/vuln.c

@@ -0,0 +1,18 @@
+// gcc source.c -o vuln -no-pie -fno-stack-protector -z execstack -m32
+
+#include <stdio.h>
+
+void unsafe() {
+    char buffer[40];
+    
+    puts("Overflow me");
+    gets(buffer);
+}
+
+void main() {
+    unsafe();
+}
+
+void flag() {
+    puts("Exploited!!!!!");
+}