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-rw-r--r--source3/smbd/process.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/source3/smbd/process.c b/source3/smbd/process.c
index 1ba1db5c5d..53c5e0b408 100644
--- a/source3/smbd/process.c
+++ b/source3/smbd/process.c
@@ -1633,8 +1633,12 @@ static void process_smb(struct smbd_server_connection *conn,
if (smbd_is_smb2_header(inbuf, nread)) {
smbd_smb2_first_negprot(smbd_server_conn, inbuf, nread);
return;
+ } else if (nread >= smb_size && valid_smb_header(inbuf)
+ && CVAL(inbuf, smb_com) != 0x72) {
+ /* This is a non-negprot SMB1 packet.
+ Disable SMB2 from now on. */
+ smbd_server_conn->allow_smb2 = false;
}
- smbd_server_conn->allow_smb2 = false;
}
show_msg((char *)inbuf);