Re: [GENERAL] PostgreSQL 7.2.2: Security Release - Mailing list pgsql-hackers

On Mon, 26 Aug 2002, Christopher Kings-Lynne wrote:

> *sigh* Someone's marked postgres 7.2.1 as forbidden in FreeBSD ports:
>
> FORBIDDEN=      "buffer overruns acknowledged by authors--see
> <URL:http://www3.us.postgresql.org/news.html>"
>
> Somewhat of an overreaction...I'm hassling the maintainer at the moment...

already fixed ...

> > -----Original Message-----
> > From: pgsql-hackers-owner@postgresql.org
> > [mailto:pgsql-hackers-owner@postgresql.org]On Behalf Of Marc G. Fournier
> > Sent: Monday, 26 August 2002 10:17 AM
> > To: Bruce Momjian
> > Cc: Gavin Sherry; Neil Conway; PostgreSQL Hackers
> > Subject: Re: [HACKERS] [GENERAL] PostgreSQL 7.2.2: Security Release
> >
> >
> > On Sun, 25 Aug 2002, Bruce Momjian wrote:
> >
> > >
> > > OK, I understand your point.  What do we need to do now that the
> > > announcement has already been made?
> >
> > I'm still slightly confused here ... from what Neil/Gavin have stated so
> > far, all it sounds like is that if I pass a wrong date/time string, it
> > will crash the backend ... or is this what I'm missing?
> >
> >
> >  >
> > >
> > ------------------------------------------------------------------
> > ---------
> > >
> > > Gavin Sherry wrote:
> > > > On Sat, 24 Aug 2002, Bruce Momjian wrote:
> > > >
> > > > >
> > > > > The issue is data-provoked crashes vs. query-invoked
> > crashes.  Marc's
> > > > > point, and I think it was clear enough, is that you can't
> > just poke at
> > > > > the TCP port and hope to do anything bad, which was the
> > thrust of the
> > > > > argument, I think.
> > > >
> > > > Bruce,
> > > >
> > > > I am convinced that someone with enough time on their hands
> > and some code
> > > > pointed to by Florian Weimer could exploit the datetime
> > overrun issue by
> > > > crafting a datetime string in such a way as to overrun the buffer and
> > > > smash the stack.
> > > >
> > > > In applications which pass date/time data directly to the
> > database without
> > > > any validation (is this datetime string greater than 52 bytes? does it
> > > > look like a date/time string?) then a malicious user without direct
> > > > database access could crash the database by taking advantage
> > of the short
> > > > comings in Postgres and the application.
> > > >
> > > > As such, I would recommend all people who offer direct access to the
> > > > database and/or have applications which user date/time data
> > > > types/functionality to upgrade to 7.2.2.
> > > >
> > > > Gavin
> > > >
> > > >
> > > >
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> > >
> > > --
> > >   Bruce Momjian                        |  http://candle.pha.pa.us
> > >   pgman@candle.pha.pa.us               |  (610) 359-1001
> > >   +  If your life is a hard drive,     |  13 Roberts Road
> > >   +  Christ can be your backup.        |  Newtown Square,
> > Pennsylvania 19073
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>