- OpenBSD CVS Sync

   - djm@cvs.openbsd.org 2006/06/14 10:50:42
     [sshconnect.c]
     limit the number of pre-banner characters we will accept; ok markus@

1 files changed, 5 insertions, 3 deletions

diff --git a/sshconnect.c b/sshconnect.c
index c76572662..e26efa4dc 100644
--- a/sshconnect.c
+++ b/sshconnect.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshconnect.c,v 1.184 2006/06/08 14:45:49 markus Exp $ */
+/* $OpenBSD: sshconnect.c,v 1.185 2006/06/14 10:50:42 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -385,10 +385,10 @@ ssh_exchange_identification(void)
         int connection_in = packet_get_connection_in();
         int connection_out = packet_get_connection_out();
         int minor1 = PROTOCOL_MINOR_1;
-        u_int i;
+        u_int i, n;
 
         /* Read other side's version identification. */
-        for (;;) {
+        for (n = 0;;) {
                 for (i = 0; i < sizeof(buf) - 1; i++) {
                         size_t len = atomicio(read, connection_in, &buf[i], 1);
 
@@ -405,6 +405,8 @@ ssh_exchange_identification(void)
                                 buf[i + 1] = 0;
                                 break;
                         }
+                        if (++n > 65536)
+                                fatal("ssh_exchange_identification: No banner received");
                 }
                 buf[sizeof(buf) - 1] = 0;
                 if (strncmp(buf, "SSH-", 4) == 0)