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From "NgocND" <ngocnguyend...@vccorp.vn>
Subject unsubscription
Date Wed, 19 Jun 2013 02:54:36 GMT


-----Original Message-----
From: gregory draperi [mailto:gregory.draperi@gmail.com] 
Sent: Tuesday, June 18, 2013 11:27 PM
To: general
Subject: Re: XSS Issue

This is a Cross-Site Request Forgery issue (not a XSS) and should be fixed
by example by adding an impredictible parameter to the request.

I'm going to send to private@lucene.apache.org what I have found.

Best regards,

Grégory

2013/6/18 Uwe Schindler <uwe@thetaphi.de>

> Just to show this without the admin interface: Add these two images to 
> any web page like this:
>
> <img src="
>
http://localhost:8983/solr/collection1/update?stream.body=%3Cdelete%3E%3Cque
ry%3E*:*%3C/query%3E%3C/delete%3E"
> />
> <img src="
> http://localhost:8983/solr/collection1/update?stream.body=%3Ccommit/%3E"
> />
>
> Anybody who visits this web page would nuke the index of his running 
> solr server on the local machine - there is not even the admin web 
> interface involved. Any REST API on earth has this problem, it is not 
> specific to Solr!
>
> Uwe
>
> -----
> Uwe Schindler
> H.-H.-Meier-Allee 63, D-28213 Bremen
> http://www.thetaphi.de
> eMail: uwe@thetaphi.de
>
>
> > -----Original Message-----
> > From: Uwe Schindler [mailto:uwe@thetaphi.de]
> > Sent: Tuesday, June 18, 2013 6:01 PM
> > To: general@lucene.apache.org
> > Cc: 'gregory draperi'
> > Subject: RE: XSS Issue
> >
> > Hi,
> >
> > you can of course send your investigation to 
> > private@lucene.apache.org,
> we
> > greatly appreciate this.
> > An XSS problem in the Solr Admin interface can for sure be solved
> somehow,
> > but would not help to make Solr secure. Without the admin interface 
> > you
> can
> > still add some image into any web page that executes a "delete whole
> index
> > request" on the Solr server.
> >
> > If you want to prevent this, you can add HTTP basic authentication 
> > to
> your
> > web container, as described in the solr wiki.
> >
> > In general: If you have e.g. an EC2 coud of solr servers, add an 
> > extra
> security
> > group to your cloud and limit all access from outside. Then also no
> admin can
> > access this.
> >
> > -----
> > Uwe Schindler
> > H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de
> > eMail: uwe@thetaphi.de
> >
> >
> > > -----Original Message-----
> > > From: gregory draperi [mailto:gregory.draperi@gmail.com]
> > > Sent: Tuesday, June 18, 2013 5:46 PM
> > > To: Uwe Schindler
> > > Cc: general
> > > Subject: Re: XSS Issue
> > >
> > > Yes he can do that but as I said the same problem can occur without
> > > his consent (and without a click) if he's on an arbitrary website
> > > which hosts a HTML IMG pointing to the vulnerable page of the solr
> > > administrator interface (like <IMG
> > > src="http://X.X.X.X/solr/admin/xss_vulnerable_page/> )
> > >
> > > I'm thankful for your quick responses despite I don't understand this
> > > philosophy. I note the point.
> > >
> > > Regards,
> > >
> > > Grégory DRAPERI
> > >
> > >
> > > 2013/6/18 Uwe Schindler <uwe@thetaphi.de>
> > >
> > > > He can also delete his whole index with a single click on a http
> > > > link referring to his Solr server. This is his problem. Never click
> > > > on links from eMail.
> > > > Solr is, as said already, not secured at all. If you want a "secure"
> > > > Solr server, rewrite the whole thing. The same applies to other
> > > > Lucene based products like ElasticSearch that have no "security"
> included.
> > > >
> > > > -----
> > > > Uwe Schindler
> > > > H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de
> > > > eMail: uwe@thetaphi.de
> > > >
> > > >
> > > > > -----Original Message-----
> > > > > From: gregory draperi [mailto:gregory.draperi@gmail.com]
> > > > > Sent: Tuesday, June 18, 2013 5:26 PM
> > > > > To: Uwe Schindler
> > > > > Cc: general
> > > > > Subject: Re: XSS Issue
> > > > >
> > > > > Hi Uwe,
> > > > >
> > > > > Thank you for your quick response.
> > > > >
> > > > > I'm a little bit surprised because XSS is not a problem of making
> > > > > solr
> > > > accessible
> > > > > or not to Internet because this a reflected XSS. If an
> administrator
> > > > receives a
> > > > > mail with a malicious link pointing to the solr administrator
> > > > > interface
> > > > and
> > > > > containing a malicious payload he will execute the JavaScript if
he
> > > > clicks on it.
> > > > >
> > > > > There also others techniques that can be used to make an solr
> > > > administrator
> > > > > executing this link without his consent (HTML IMG TAG pointing to
> > > > > the
> > > > solr
> > > > > administration interface and hosted on a malicious website)  and
> > > > > that
> > > > will
> > > > > bypass network based protection.
> > > > >
> > > > > Regards,
> > > > >
> > > > > Grégory DRAPERI
> > > > >
> > > > >
> > > > > 2013/6/18 Uwe Schindler <uwe@thetaphi.de>
> > > > >
> > > > > > Hi Grégory,
> > > > > >
> > > > > > Solr should be always only listen on private networks, never
make
> > > > > > it accessible to the internet. This is officially documented;
for
> > > > > > more Information about this, see:
> > > > > > http://wiki.apache.org/solr/SolrSecurity
> > > > > > Solr uses HTTP as its programming API and you can do everything
> > > > > > Java allows via HTTP, but HTTP does not mean it must be open
to
> > > > > > the internet. By opening a Solr server to the internet you are
> > > > > > somehow wrapping everything Java allows to the internet, so
it
is
> > > > > > not recommeneded. Solr also has no security features at all;
> > > > > > managing this is all up to the front-end, sitting on internet
or
> insecure
> > > networks.
> > > > > >
> > > > > > There are already some issues open to limit some XSS and similar
> > > > access:
> > > > > > https://issues.apache.org/jira/browse/SOLR-4882
> > > > > >
> > > > > > Uwe
> > > > > >
> > > > > > -----
> > > > > > Uwe Schindler
> > > > > > H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de
> > > > > > eMail: uwe@thetaphi.de
> > > > > >
> > > > > >
> > > > > > > -----Original Message-----
> > > > > > > From: gregory draperi [mailto:gregory.draperi@gmail.com]
> > > > > > > Sent: Tuesday, June 18, 2013 3:13 PM
> > > > > > > To: general@lucene.apache.org
> > > > > > > Subject: XSS Issue
> > > > > > >
> > > > > > > Dear Solr project members,
> > > > > > >
> > > > > > > I think I have found a XSS (Cross-Site Scripting) issue
in the
> 3.6.2
> > > > > > version of
> > > > > > > Solr.
> > > > > > >
> > > > > > > How can I give you more details?
> > > > > > >
> > > > > > > Regards,
> > > > > > >
> > > > > > > --
> > > > > > > Grégory Draperi
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Grégory Draperi
> > > >
> > > >
> > >
> > >
> > > --
> > > Grégory Draperi
>
>


-- 
Grégory Draperi


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