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Re: Advisory on possibly insecure security definer functions

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On Wed, 14 Feb 2007, Peter Eisentraut wrote:

> By installing functions or operators with appropriate signatures in
> other schemas, users can then redirect any function or operator
> call in the function code to implementations of their choice
> [snip]
> The proper fix for this problem is to insert explicit SET search_path 
> commands into each affected function to produce a known safe schema 
> search path.

This fix is not enough in certain common configurations. I've sent a
proof of concept to security<at>postgresql.org, but I won't disclose
it before I'm allowed to by security team.

Regards
Tometzky
-- 
...although Eating Honey was a very good thing to do, there was a
moment just before you began to eat it which was better than when you
were...
                                                      Winnie the Pooh


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