Re: @(#)Mordre Labs advisory 0x0005: Several buffer overruns in PostgreSQL

From: Neil Conway <neilc(at)samurai(dot)com>
To: Sir Mordred The Traitor <mordred(at)s-mail(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: @(#)Mordre Labs advisory 0x0005: Several buffer overruns in PostgreSQL
Date: 2002-08-28 19:10:57
Message-ID: 87elcidcji.fsf@mailbox.samurai.com
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Sir Mordred The Traitor <mordred(at)s-mail(dot)com> writes:
> Upon invoking a polygon(integer, circle) function a
> src/backend/utils/adt/geo_ops.c:circle_poly() function will gets
> called, which suffers from a buffer overflow.
>
> 2) A src/backend/adt/utils/geo_ops.c:path_encode() fails to detect a
> buffer overrun condition. It is called in multiple places, the most
> interesting are path_out() and poly_out() functions.

> 5) A src/backend/utils/adt/geo_ops.c:path_add() also fails to detect
> a simple buffer overrun.

I've attached a patch which should fix these problems.

> 3) Upon converting a char string to a path object, a
> src/backend/utils/adt/geo_ops.c:path_in() function will gets called,
> which suffers from a buffer overrun, caused by a very long argument.

> 4) A src/backend/utils/adt/geo_ops.c:poly_in() function fails to
> detect a buffer overrun condition caused by a very long argument.

I wasn't able to reproduce either of these (wouldn't it require an
input string with several hundred thousand commas?), can you give me a
test-case?

Cheers,

Neil

--
Neil Conway <neilc(at)samurai(dot)com> || PGP Key ID: DB3C29FC

Attachment Content-Type Size
geo_fixes-1.patch text/x-patch 3.3 KB

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