smb1cli_inbuf_parse_chain fails with SMBntcreateX extended response

Gordon Ross gordon.w.ross at
Thu Mar 31 16:40:26 UTC 2016

Better capture.

On Thu, Mar 31, 2016 at 12:23 PM, Gordon Ross <gordon.w.ross at> wrote:
> Has anyone tried smbtorture lately with SMB1 NT create and the
> "extended response" format?   [MS-SMB] Sec.
>     Windows-based SMB servers send 50 (0x32) words in the extended
> response although * they set the WordCount field to 0x2A.
> This trips up smb1cli_inbuf_parse_chain, which ends up using the
> "Maximal Access Rights" field as the byte count, and then decides
> the response is invalid because the message is not that long.
> I've attached a sample response packet.
> Here's an (admittedly hack-ish) way to deal with that.
> [patch attached]
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