Re: [HACKERS] Query cancel and OOB data (fwd)

> OK, lets review this, with thought about our various authentication
> options:
>
> trust, password, ident, crypt, krb4, krb5
>
> As far as I know, they all transmit queries and results as clear text
> across the network. They encrypt the passwords and tickets, but not the
> data. [Even kerberos does not encrypt the data stream, does it?]
>
> So, if someone snoops the network, they will see the query and results,
> and see the cancel secret key. Of course, once they see the cancel
> secret key, it is trivial for them to send that to the postmaster to
> cancel a query. However, if they are already snooping, how much harder
> is it for them to insert their own query into the tcp stream? If it is
> as easy as sending the cancel secret key, then the additional
> vulnerability of being able to replay the cancel packet is trivial
> compared to the ability to send your own query, so we don't loose
> anything by using a non-encrypted cancel secret key.

Can someone answer this for me?

>
> Of course, if the stream were encrypted, they could not see the secret key
> needs to be accepted and sent in an encrypted format.
>
> --
> Bruce Momjian | 830 Blythe Avenue
> maillist(at)candle(dot)pha(dot)pa(dot)us | Drexel Hill, Pennsylvania 19026
> + If your life is a hard drive, | (610) 353-9879(w)
> + Christ can be your backup. | (610) 853-3000(h)
>

--
Bruce Momjian | 830 Blythe Avenue
maillist(at)candle(dot)pha(dot)pa(dot)us | Drexel Hill, Pennsylvania 19026
+ If your life is a hard drive, | (610) 353-9879(w)
+ Christ can be your backup. | (610) 853-3000(h)