diff --git a/rop_exec.json b/rop_exec.json
index a9f21b7..f206242 100644
--- a/rop_exec.json
+++ b/rop_exec.json
@@ -1 +1 @@
-["/home/vagrant/cw/netcat-0.7.1/src/netcat", "-lnp", "5678", "-tte", "/bin/sh"]
\ No newline at end of file
+["/bin/echo", "\n[ Successful ROP! ]"]
\ No newline at end of file
diff --git a/vuln-programs/.gitignore b/vuln-programs/.gitignore
new file mode 100644
index 0000000..1d46c70
--- /dev/null
+++ b/vuln-programs/.gitignore
@@ -0,0 +1,6 @@
+# ignore binaries
+
+*
+!/**/
+!*.*
+!Makefile
diff --git a/vuln-programs/null-data-addr/Makefile b/vuln-programs/null-data-addr/Makefile
new file mode 100644
index 0000000..c8caea0
--- /dev/null
+++ b/vuln-programs/null-data-addr/Makefile
@@ -0,0 +1,2 @@
+null-data-addr: null-data-addr.c
+	gcc -fno-pie -no-pie -fno-stack-protector -m32 -static $^ -o $@ -Tdata 0x080d9100
diff --git a/vuln-programs/null-data-addr/null-data-addr.c b/vuln-programs/null-data-addr/null-data-addr.c
new file mode 100644
index 0000000..4715064
--- /dev/null
+++ b/vuln-programs/null-data-addr/null-data-addr.c
@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+int copyData(char *string)
+{
+	char buf[32];
+	strcpy(buf, string);
+	return (0);
+}
+
+int main(int argc, char *argv[])
+{
+	char buffer[700];
+	FILE *file;
+    if (argc !=2)
+    {
+        printf("[*] invalid arguments!\n [*] > %s file_name\n",argv[0]);
+        exit(0);
+    }
+	printf("opening file\n");
+	file = fopen(argv[1],"rb");
+	if (!file)
+	{ 
+		//printf("file not opened %s", strerror(errno));
+		fprintf(stderr,"file not opened %s", strerror(errno));
+		//printf("error");
+		return (0);
+	}
+	printf("file opened\n");
+	fread(buffer, 699,1,file);
+	fclose(file);
+	copyData(buffer);
+	return (0);
+}
+		
+