diff -Naur a/boost/asio/detail/impl/socket_ops.ipp b/boost/asio/detail/impl/socket_ops.ipp
--- a/boost/asio/detail/impl/socket_ops.ipp	2012-07-23 16:33:31.000000000 +0530
+++ b/boost/asio/detail/impl/socket_ops.ipp	2012-12-13 14:59:03.000000000 +0530
@@ -1880,7 +1880,15 @@
         && ((ipv6_address->s6_addr[1] & 0xc0) == 0x80));
     if (!is_link_local || if_indextoname(scope_id, if_name + 1) == 0)
       sprintf(if_name + 1, "%lu", scope_id);
-    strcat(dest, if_name);
+
+    if((strlen(dest)+strlen(if_name))  < length)
+	    strcat(dest, if_name);
+    else
+    {
+	    ec = boost::asio::error::invalid_argument; // length is not sufficient
+	    result=0;
+    }
+
   }
   return result;
 #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)