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From "Uwe Schindler" <...@thetaphi.de>
Subject RE: XSS Issue
Date Tue, 18 Jun 2013 16:17:42 GMT
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%3Cquery%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


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