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Date: Sun, 13 Mar 2011 15:41:55 -0300
From: Felipe Pena <felipensp@...il.com>
To: oss-security@...ts.openwall.com
Cc: Oden Eriksson <oeriksson@...driva.com>
Subject: Re: CVE request: PHP substr_replace() use-after-free

2011/3/13 Oden Eriksson <oeriksson@...driva.com>

> söndagen den 13 mars 2011 15.00.10 skrev  Felipe Pena:
> > Hi,
> >
> > I just found an use-after-free in PHP's substr_replace() function caused
> by
> > passing the same variable multiple times to the function, which makes the
> > PHP to use the same pointer in three variables inside the function, so
> when
> > the pointer is changed by a type conversion inside the function, it
> > invalids the other variables.
> >
> > The PHP security team has seen noticed, and a bug already was filed in
> the
> > bugtracker (http://bugs.php.net/bug.php?id=54238 [private])
> >
> > $ sapi/cli/php ../bug.php
> > array(1) {
> > [0]=>
> > string(5) "0Ȅ y"
> > }
> > array(1) {
> > [0]=>
> > string(1) "0"
> > }
> >
> >
> > Thanks.
>
> It seems only 5.2 is affected because I couldn't reproduce it on 5.3. Or?
>
>
It affects 5.2, 5.3 and even trunk. I can reproduce it in all the branches.

-- 
Regards,
Felipe Pena

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