[UNIX] Buffer Overflow in PostgreSQL's repeat()
From: SecuriTeam (support_at_securiteam.com)
Date: 11/02/03
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To: list@securiteam.com Date: 2 Nov 2003 18:01:13 +0200
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Buffer Overflow in PostgreSQL's repeat()
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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 repeat() 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
Upon invoking a repeat() function, a
src/backend/utils/adt/oracle_compat.c::repeat() function will gets called
which suffers from a buffer overflow.
How to reproduce:
psql> select repeat('xxx',1431655765);
pqReadData() -- backend closed the channel unexpectedly.
This probably means the backend terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
ADDITIONAL INFORMATION
The information has been provided by <mailto:mordred@s-mail.com> Sir
Mordred The Traitor.
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