[UNIX] Another Buffer Overflow Found in PostgreSQL (repeat function)

From: support@securiteam.com
Date: 08/21/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Wed, 21 Aug 2002 10:51:21 +0200 (CEST)

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  Another Buffer Overflow Found in PostgreSQL (repeat function)
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SUMMARY

 <http://www.postgresql.org> PostgreSQL is a sophisticated
Object-Relational DBMS, supporting almost all SQL constructs, including
subselects, transactions, and user-defined types and functions. There
exists a heap buffer overflow in a repeat(text, integer) function, which
allows an attacker to execute malicious code.

DETAILS

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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