--- a/hws/hw03.tex	Tue Oct 21 12:42:19 2014 +0100
+++ b/hws/hw03.tex	Wed Oct 22 23:38:02 2014 +0100
@@ -19,6 +19,9 @@
 \item Why is it crucuial for a buffer overflow attack that the stack
   grows from higher addresses to lower ones?
 
+\item If the attacker uses a buffer overflow attack in order to
+inject code, why can this code not contain any zero bytes?
+
 \item How does a stack canary help with preventing a buffer-overflow
   attack?