full-disclosure - Re: Python 2.5 (Modules/zlib) minigzip local buffer overflow vulnerability

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Date: Fri, 16 Mar 2007 02:01:29 +0100
From: Alejandro Barrera <abarrera@...n-gate.net>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: Python 2.5 (Modules/zlib) minigzip local
	buffer overflow vulnerability

> > Thus, replacing strcpy(3) calls with strncpy(3) can have definite
> > impacts on performance.
>
> But the question is how big impact? Its a security/speed trade-off.

That depends on your actual code. It's not a security/speed trade-off, it's a
_I_don't_fucking_care_about_anything_and_I_use_the_easiest_function/speed 
trade-off.

If you care about security AND speed then you use strcpy() correctly, if 
you're a lazy bastard and don't care about speed, then use strncpy().

Anyway, usually you should fill the whole buffer, so if you know how to code, 
it shouldn't have a big impact. *BUT* if you're one of those lazy guys that 
just allocate a 1024 char buffer to copy 32 char strings then you have worse 
problems than security.

>
> Regards.

-- 
Alejandro Barrera García-Orea
R&D Engineer
c/ Alcala 268 28027 Madrid
Office: +34 91 326 66 11
Fax: +34 91 326 66 11
e-mail: abarrera@...n-gate.net

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