SPIP 3.1.1/3.1.2 – File Enumeration / Path Traversal

• Exploit Database
• 124 阅读

• 作者： Sysdream
  日期： 2016-10-20
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/40596/
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  ## SPIP 3.1.1/3.1.2 File Enumeration / Path Traversal (CVE-2016-7982)   ### Product Description   SPIP is a publishing system for the Internet, which put importance on collaborative working, multilingual environments and ease of use. It is free software, distributed under the GNU/GPL licence.   ### Vulnerability Description   The <code>valider_xml</code> file can be used to enumerate files on the system.   **Access Vector**: remote   **Security Risk**: medium   **Vulnerability**: CWE-538   **CVSS Base Score**: 4.9 (Medium)   **CVE-ID**: CVE-2016-7982   ### Proof of Concept   Enumerating <code>.ini</code> files inside <code>/etc</code> (SPIP 3.1.1) :   http://spip-dev.srv/ecrire/?exec=valider_xml&var_url=/etc&ext=ini&recur=2   Bypassing SPIP 3.1.2 protection using PHP Wrappers :   http://spip-dev.srv/ecrire/?exec=valider_xml&var_url=file:///etc&ext=ini&recur=2   ### Vulnerable code   if (is_dir($url)) { $dir = (substr($url, -1, 1) === &apos;/&apos;) ? $url : "$url/"; $ext = !preg_match(&apos;/^[.*\w]+$/&apos;, $req_ext) ? &apos;php&apos; : $req_ext; $files = preg_files($dir, "$ext$", $limit, $rec); if (!$files and $ext !== &apos;html&apos;) { $files = preg_files($dir, &apos;html$&apos;, $limit, $rec); if ($files) { $ext = &apos;html&apos;; } } if ($files) { $res = valider_dir($files, $ext, $url); list($err, $res) = valider_resultats($res, $ext === &apos;html&apos;);   File names are stored in <code>$res</code> and displayed by <code>echo</code> on line 146 :   echo "<h1>", $titre, &apos;<br>&apos;, $bandeau, &apos;</h1>&apos;, "<div style=&apos;text-align: center&apos;>", $onfocus, "</div>", $res, fin_page();       ### Timeline (dd/mm/yyyy)   * 15/09/2016 : Initial discovery * 26/09/2016 : Contact with SPIP Team * 27/09/2016 : Answer from SPIP Team, sent advisory details * 27/09/2016 : Incorrect fixes for Path Traversal * 27/09/2016 : New proof of concept for bypassing Path Traversal sent. * 27/09/2016 : Bad fix for Path Traversal (23185) * 28/09/2016 : New proof of concept for bypassing fixes for Path Traversal on Windows systems. * 28/09/2016 : Fixes issued Path Traversal (23200) * 30/09/2016 : SPIP 3.1.3 Released   ### Fixes   * https://core.spip.net/projects/spip/repository/revisions/23207 * https://core.spip.net/projects/spip/repository/revisions/23208 * https://core.spip.net/projects/spip/repository/revisions/23206 * https://core.spip.net/projects/spip/repository/revisions/23202 * https://core.spip.net/projects/spip/repository/revisions/23201 * https://core.spip.net/projects/spip/repository/revisions/23200 * https://core.spip.net/projects/spip/repository/revisions/23191 * https://core.spip.net/projects/spip/repository/revisions/23190 * https://core.spip.net/projects/spip/repository/revisions/23193 * https://core.spip.net/projects/spip/repository/revisions/23188 * https://core.spip.net/projects/spip/repository/revisions/23187 * https://core.spip.net/projects/spip/repository/revisions/23185 * https://core.spip.net/projects/spip/repository/revisions/23182 * https://core.spip.net/projects/spip/repository/revisions/23184     ### Affected versions   * Version <= 3.1.2   ### Credits   * Nicolas CHATELAIN, Sysdream (n.chatelain -at- sysdream -dot- com)     -- SYSDREAM Labs <labs@sysdream.com> GPG : 47D1 E124 C43E F992 2A2E 1551 8EB4 8CD9 D5B2 59A1 * Website: https://sysdream.com/ * Twitter: @sysdream