diff options
| -rw-r--r-- | source3/smbd/process.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/source3/smbd/process.c b/source3/smbd/process.c index bf3abf9758..35f1d6fb3c 100644 --- a/source3/smbd/process.c +++ b/source3/smbd/process.c @@ -70,13 +70,22 @@ void init_smb_request(struct smb_request *req, const uint8 *inbuf) req->vuid = SVAL(inbuf, smb_uid); req->tid = SVAL(inbuf, smb_tid); req->wct = CVAL(inbuf, smb_wct); - /* Ensure we have at least wct words. */ + /* Ensure we have at least wct words and 2 bytes of bcc. */ if (smb_size + req->wct*2 > req_size) { DEBUG(0,("init_smb_request: invalid wct number %u (size %u)\n", (unsigned int)req->wct, (unsigned int)req_size)); exit_server_cleanly("Invalid SMB request"); } + /* Ensure bcc is correct. */ + if (((uint8 *)smb_buf(inbuf)) + smb_buflen(inbuf) > inbuf + req_size) { + DEBUG(0,("init_smb_request: invalid bcc number %u " + "(wct = %u, size %u)\n", + (unsigned int)smb_buflen(inbuf), + (unsigned int)req->wct, + (unsigned int)req_size)); + exit_server_cleanly("Invalid SMB request"); + } req->inbuf = inbuf; req->outbuf = NULL; } |