oss-security - Re: CVE id request: php-xajax

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Message-ID: <20081217180221.GF19388@ngolde.de>
Date: Wed, 17 Dec 2008 19:02:21 +0100
From: Nico Golde <oss-security+ml@...lde.de>
To: Steffen Joeris <steffen.joeris@...lelinux.de>
Cc: oss-security@...ts.openwall.com, Nico Golde <oss-security+ml@...lde.de>,
	"Steven M. Christey" <coley@...us.mitre.org>
Subject: Re: CVE id request: php-xajax

Hi,
* Steffen Joeris <steffen.joeris@...lelinux.de> [2008-12-17 18:59]:
> On Wed, 17 Dec 2008 06:19:20 pm Nico Golde wrote:
> > * Steven M. Christey <coley@...us.mitre.org> [2008-12-17 17:53]:
> > > On Wed, 17 Dec 2008, Steffen Joeris wrote:
> > > > The patch for CVE-2007-2739 seems incomplete as it doesn't escape "&".
> > > > I recommend removing the replace call and using htmlspecialchars()
> > > > instead.
> > >
> > > This counts for a new CVE, so use CVE-2008-5623
> > >
> > > Will there be more details available, or should I just write the
> > > description up based on the oss-security post?  Which versions are
> > > affected?
> >
> > Please enlighten me why it is incomplete. As far as I know
> > you can't perform an XSS with & only (I'm not a webappsec
> > expert though). But the reason it behaves different from
> > htmlspecialchars should not make this patch incomplete.
> Afaik you can use & to specify values like ../foo.php&value=bar
> Thus the patch looked incomplete to me and should be extended to escape & as 
> well.

I see no problem with specifying GET variables here unless 
this is some kind of CSRF which I don't see in this case.

Cheers
Nico
-- 
Nico Golde - http://www.ngolde.de - nion@...ber.ccc.de - GPG: 0x73647CFF
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