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Re: Escaping strings for inclusion into SQL queries

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Florian Weimer <Florian(dot)Weimer(at)RUS(dot)Uni-Stuttgart(dot)DE>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Escaping strings for inclusion into SQL queries
Date: 2001-09-04 00:59:41
Message-ID: 200109040059.f840xf806810@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
I am going to apply this patch with the change that the function name
will be PQ* not PG*.

> It has come to our attention that many applications which use libpq
> are vulnerable to code insertion attacks in strings and identifiers
> passed to these applications.  We have collected some evidence which
> suggests that this is related to the fact that libpq does not provide
> a function to escape strings and identifiers properly.  (Both the
> Oracle and MySQL client libraries include such a function, and the
> vast majority of applications we examined are not vulnerable to code
> insertion attacks because they use this function.)
> 
> We therefore suggest that a string escaping function is included in a
> future version of PostgreSQL and libpq.  A sample implementation is
> provided below, along with documentation.
> 
> -- 
> Florian Weimer 	                  Florian(dot)Weimer(at)RUS(dot)Uni-Stuttgart(dot)DE
> University of Stuttgart           http://cert.uni-stuttgart.de/
> RUS-CERT                          +49-711-685-5973/fax +49-711-685-5898

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

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