1 files changed, 6 insertions, 4 deletions

diff --git a/channels.c b/channels.c
index 354160e8f..a079fc24d 100644
--- a/channels.c
+++ b/channels.c
@@ -40,7 +40,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: channels.c,v 1.89 2001/02/04 15:32:23 stevesk Exp $");
+RCSID("$OpenBSD: channels.c,v 1.90 2001/02/08 21:58:28 markus Exp $");
 
 #include <openssl/rsa.h>
 #include <openssl/dsa.h>
@@ -2227,7 +2227,7 @@ x11_request_forwarding_with_spoofing(int client_session_id,
     const char *proto, const char *data)
 {
         u_int data_len = (u_int) strlen(data) / 2;
-        u_int i, value;
+        u_int i, value, len;
         char *new_data;
         int screen_number;
         const char *cp;
@@ -2265,9 +2265,11 @@ x11_request_forwarding_with_spoofing(int client_session_id,
         x11_fake_data_len = data_len;
 
         /* Convert the fake data into hex. */
-        new_data = xmalloc(2 * data_len + 1);
+        len = 2 * data_len + 1;
+        new_data = xmalloc(len);
         for (i = 0; i < data_len; i++)
-                sprintf(new_data + 2 * i, "%02x", (u_char) x11_fake_data[i]);
+                snprintf(new_data + 2 * i, len - 2 * i,
+                    "%02x", (u_char) x11_fake_data[i]);
 
         /* Send the request packet. */
         if (compat20) {