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Re: Bug #424: JDBC driver security issue.

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: David(dot)Daney(at)avtrex(dot)com, pgsql-bugs(at)postgresql(dot)org
Subject: Re: Bug #424: JDBC driver security issue.
Date: 2001-08-24 16:02:30
Message-ID: 200108241602.f7OG2Un03996@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugspgsql-jdbc
Your patch has been added to the PostgreSQL unapplied patches list at:

	http://candle.pha.pa.us/cgi-bin/pgpatches

I will try to apply it within the next 48 hours.

> David Daney (David(dot)Daney(at)avtrex(dot)com) reports a bug with a severity of 3
> The lower the number the more severe it is.
> 
> Short Description
> JDBC driver security issue.
> 
> Long Description
> The JDBC driver requires 
> 
>    permission java.lang.RuntimePermission "shutdownHooks";
> 
> in the policy file in order to function.  However the driver does not protect the shutdown hooks call in an AccessController.doPrivileged() call, so these permissions must be granted to all code not just the postgres JDBC driver.
> 
> 
> Sample Code
> Here is a diff that fixes the problem.
> 
> *** ConnectionHook.java.orig	Mon Mar  5 01:17:43 2001
> --- ConnectionHook.java	Thu Aug 23 16:51:49 2001
> ***************
> *** 1,6 ****
> --- 1,9 ----
>   package org.postgresql.core;
>   
>   import java.sql.SQLException;
> + import java.security.AccessController;
> + import java.security.PrivilegedAction;
> + 
>   import java.util.ArrayList;
>   import java.util.Iterator;
>   import org.postgresql.Connection;
> ***************
> *** 51,57 ****
>      */
>     private ConnectionHook() {
>       super();
> !     Runtime.getRuntime().addShutdownHook(new Thread(this));
>     }
>   
>     /**
> --- 54,65 ----
>      */
>     private ConnectionHook() {
>       super();
> !     AccessController.doPrivileged(new PrivilegedAction() {
> !           public Object run() {
> !              Runtime.getRuntime().addShutdownHook(new Thread(ConnectionHook.this));
> !              return null; // nothing to return
> !           }
> !        });
>     }
>   
>     /**
> 
> 
> No file was uploaded with this report
> 
> 
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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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