Hi Adrian,
I meant a scenario, when user is trying to connect to database (doesn't matter what interface) and database fails at this moment. If all authentication/authorization/validation functions are written to return false in case of abnormal termination, we are fine. If not, we can potentially encounter the situation when database fails into state where user is given greater privileges than he/she should or even authenticated, when he/she shouldn't.
Thanks,
Oleg
On Tue, Jan 5, 2016 at 5:34 PM, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:
On 01/05/2016 03:21 PM, oleg yusim wrote:
Thanks JD.
From what I read about WAL (you have been referring to this:
http://www.postgresql.org/docs/current/static/wal-internals.html
pg_xlog, right?) it allows us to know what happened, but does it
warranty known secure state? I mean, I do not think it would help with this:
"In general, security mechanisms should be designed so that a failure
will follow the same execution path as disallowing the operation. For
example, application security methods, such as isAuthorized(),
isAuthenticated(), and validate(), should all return false if there is
an exception during processing. If security controls can throw
exceptions, they must be very clear about exactly what that condition
means. "
Not sure what you are talking about above. the application as in the client application connecting to the database or the database application itself?
Right?
Thanks,
Oleg
On Tue, Jan 5, 2016 at 5:14 PM, Joshua D. Drake <jd@xxxxxxxxxxxxxxxxx
<mailto:jd@xxxxxxxxxxxxxxxxx>> wrote:
On 01/05/2016 03:09 PM, oleg yusim wrote:
The question here, what is PostreSQL 9.4.5 (hosted on Linux box)
behavior? Does it fail to known/secure state in these 3 cases? I
tried
to find the description of the way PostgreSQL fails in this
regard, but
didn't find much.
Based on what you pasted, PostgreSQL does fail to a known state.
That is the whole point of the xlog.
Sincerely,
JD
Thanks,
Oleg
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