Hello,
The purpose of this email is twofold: 1) to inform you of a reported
vulnerability by a third party, not myself, involving one of your products,
and 2) to obtain confirmation/clarification and knowledge of any measures
taken to address this in the event it is viable. The report indicates that
appropriate contact was made to your organization - I trust this is the
case.
Below is the report (snipped):
--- Begin report ---
-----Original Message-----
From: Robert van der Meulen [mailto:rvdm@CISTRON.NL]
Sent: Sunday, April 23, 2000 4:03 PM
To: BUGTRAQ@SECURITYFOCUS.COM
Subject: Postgresql cleartext password storage
Hi,
While migrating some postgres databases to a different server (including
user accounts) i noticed the following problem in the way postgres stores
user passwords:
SmellyCat:/var/postgres/data# strings pg_shadow
someaccountname
someaccountpassword
anotheraccountname
anotheraccountpassword
SmellyCat:/var/postgres/data#
This means postgresql stores usernames and passwords, cleartext, in
pg_shadow.
pg_shadow (and the other administrative tables) are owned by user postgres,
and only readable by user postgres, although modifying them trough the pgsql
monitor is usually protected by a password.
The passwords being cleartext, and readable by user postgres (and root,
ofcourse), allows bypassing the password mechanism, and gives access to all
databases. (compromising user 'postgres' or reading the pg_shadow file gives
access to the usernames/passwords)
Ofcourse this came in handy for me, but i think it's not the way it should
be :)
I tested this on postgres versions 6.3.2 and 6.5.3 , others probably
experience this problem as well.
This message is mailed to bugtraq, and Cc'd to the postgresql developers.
Greets,
Robert van der Meulen/Emphyrio
--
| rvdm@cistron.nl - Cistron Internet Services - www.cistron.nl |
| php3/c/perl/html/c++/sed/awk/linux/sql/cgi/security |
| My statements are mine, and not necessarily cistron's. |
--- End report ---
An explanation of my query - I work for Infrastructure Defense, Inc., which
provides private publications to fortune 500 companies about
information/computer security trends, vulnerabilities, etc. I strive to
contact the appropriate parties whenever there is a question as to the
veracity of a post, claim, other. Hence, my email to you.
I hope to hear from you soon.
Servio Medina - smedina@idefense.com
Information Security Analyst
www.idefense.com