From: Sven Verdoolaege <skimo@kotnet.org>
Date: Mon, 19 Sep 2005 12:42:22 GMT
Subject: Re: sprintf security holes?
Message-ID: <20050919124222.GD15165MdfPADPa@greensroom.kotnet.org>
In-Reply-To: <7voe6pv6zz.fsf@assigned-by-dhcp.cox.net>

On Mon, Sep 19, 2005 at 12:42:08AM -0700, Junio C Hamano wrote:
> We _might_ be protected from buffer overrun errors [*1*], but we
> would then end up operating on a truncated data -- which would
> lead to an equally unexpected behaviour.  I do not think there
> is any guarantee that working with unexpectedly truncated data
> leads to less severe security problems than buffer overruns with
> careless sprintf().

But you can _check_ whether the data has been truncated.
Just look at the return value of snprintf.

skimo