[UNIX] Buffer Overflow in PostgreSQL's cash_words()
From: SecuriTeam (support_at_securiteam.com)
Date: 11/02/03
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To: list@securiteam.com Date: 2 Nov 2003 17:54:43 +0200
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Buffer Overflow in PostgreSQL's cash_words()
------------------------------------------------------------------------
SUMMARY
<http://www.postgresql.org/> PostgreSQL is "an advanced object-relational
database management system that supports an extended subset of the SQL
standard, including transactions, foreign keys, subqueries, triggers,
user-defined types and functions".
A vulnerability in PostgreSQL's cash_words() allows attacker to cause the
program to execute arbitrary code by overflowing an internal buffer.
DETAILS
Vulnerable systems:
* PostgreSQL version 7.2.0 and prior
Immune systems:
* PostgreSQL version 7.2.1
There exists a stack based buffer overflow in cash_words() function, that
potentially allows an attacker to execute malicious code.
How to reproduce:
psql> select cash_words('-700000000000000000000000000000');
pgReadData() -- backend closed the channel unexpectedly.
.... ....
The connection to the server was lost...
Solution:
Upgrade to version 7.2.1.
ADDITIONAL INFORMATION
The information has been provided by <mailto:mordred@s-mail.com> Sir
Mordred The Traitor.
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