Greenbone Security Assistant (GSA) Default Credentials (HTTP)

# SPDX-FileCopyrightText: 2015 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:/a:greenbone:greenbone_security_assistant";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105354");
  script_version("2024-07-10T05:05:27+0000");
  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:"2024-07-10 05:05:27 +0000 (Wed, 10 Jul 2024)");
  script_tag(name:"creation_date", value:"2015-09-14 14:47:11 +0200 (Mon, 14 Sep 2015)");
  script_name("Greenbone Security Assistant (GSA) Default Credentials (HTTP)");
  script_category(ACT_ATTACK);
  script_family("Default Accounts");
  script_copyright("Copyright (C) 2015 Greenbone AG");
  script_dependencies("gb_greenbone_gsa_http_detect.nasl", "gb_default_credentials_options.nasl");
  script_require_ports("Services/www", 80, 443, 9392);
  script_mandatory_keys("greenbone/gsa/http/detected");
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_tag(name:"summary", value:"The remote Greenbone Security Assistant (GSA) is installed /
  configured in a way that it has account(s) with default passwords enabled.");

  script_tag(name:"impact", value:"This issue may be exploited by a remote attacker to gain access
  to sensitive information or modify system configuration.");

  script_tag(name:"vuldetect", value:"Tries to login with known default credentials via the HTTP
  protocol.");

  script_tag(name:"solution", value:"Change the password of the mentioned account(s).");

  script_tag(name:"qod_type", value:"exploit");
  script_tag(name:"solution_type", value:"Workaround");

  exit(0);
}

if(get_kb_item("default_credentials/disable_default_account_checks"))
  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, service:"www" ) )
  exit( 0 );

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

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

if( get_kb_item( "greenbone/gsa/" + port + "/gmp" ) ) {
  url = dir + "/gmp";
  is_omp = FALSE;
} else {
  url = dir + "/omp";
  is_omp = TRUE;
}

# nb:
# - Keep this list in sync with 2019/greenbone/gb_openvasmd_gvmd_omp_gmp_default_credentials.nasl
# - We might want to use a list and a separator between the credentials (like e.g. #---#) in the
#   future so that we don't need the "Admin", "aDmin" and similar handling below
creds = make_array(

  # OpenVAS Virtual Appliance
  "admin", "admin",

  # Docker image from https://github.com/falegk/openvas_pg#usage
  "sadmin", "changeme",

  # Docker image from https://github.com/mikesplain/openvas-docker#usage
  # nb: The username is "admin" but the uppercase "A" is used here to have a different array index
  "Admin", "openvas",

  # Docker image from:
  # - https://github.com/Secure-Compliance-Solutions-LLC/GVM-Docker
  # - https://github.com/onvio/gvm-openvas-scanner/blob/main/README.md#usage
  # nb: The username is "admin" but the uppercase "D" is used here to have a different array index
  "aDmin", "adminpassword",

  # Created by the following install script: https://github.com/itiligent/Easy-OpenVAS-Builder
  # nb: The username is "admin" but the uppercase "M" is used here to have a different array index
  "adMin", "password",

  # Created by the following install script: https://github.com/yu210148/gvm_install
  "gvmadmin", "StrongPass",

  # The ones below might be used from time to time out there
  "observer", "observer",
  "webadmin", "webadmin",
  "gmp", "gmp",
  "omp", "omp"
);

report = 'It was possible to login using the following credentials (username:password):\n';

foreach username( keys( creds ) ) {

  password = creds[username];
  username = tolower( username ); # nb: See comments above
  bound = rand();

  post_data = '-----------------------------' + bound + '\r\n' +
              'Content-Disposition: form-data; name="cmd"\r\n' +
              '\r\n' +
              'login\r\n' +
              '-----------------------------' + bound + '\r\n';

  if( is_omp ) {
    post_data += 'Content-Disposition: form-data; name="text"\r\n' +
                 '\r\n' +
                 '/omp?r=1\r\n' +
                 '-----------------------------' + bound + '\r\n';
  }

  post_data += 'Content-Disposition: form-data; name="login"\r\n' +
               '\r\n' +
               username + '\r\n' +
               '-----------------------------' + bound + '\r\n' +
               'Content-Disposition: form-data; name="password"\r\n' +
               '\r\n' +
               password + '\r\n' +
               '-----------------------------' + bound + '--\r\n';

  referer_url = "/login";
  if( is_omp )
    referer_url += "/login.html";

  headers = make_array( "Content-Type", "multipart/form-data; boundary=---------------------------" + bound );

  req = http_post_put_req( port:port, url:url, data:post_data, add_headers:headers, referer_url:referer_url, accept_header:"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8" );
  buf = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );
  if( ! buf )
    continue;

  if( is_omp ) {
    if( buf !~ "^HTTP/1\.[01] 303" )
      continue;

    token = eregmatch( pattern:'token=([^\r\n "]+)', string:buf );
    if( isnull( token[1] ) )
      continue;

  } else {
    if( buf !~ "^HTTP/1\.[01] 200" || buf =~ "Authentication required" )
      continue;

    # nb: Currently not required but we're verifying it anyway for a maybe later use.
    token = eregmatch( pattern:"<token>([^<]+)</token>", string:buf );
    if( isnull( token[1] ) )
      continue;
  }

  cookie = eregmatch( pattern:'Set-Cookie: ([^\r\n]+)', string:buf );
  if( isnull( cookie[1] ) )
    continue;

  if( is_omp ) {
    url += "?r=1&token=" + token[1];

    if( http_vuln_check( port:port, url:url, pattern:">Logged in as", extra_check:make_list( ">Tasks<", ">Targets<", ">Logout<" ), cookie:cookie[1] ) ) {
      vuln    = TRUE;
      report += '\n' + username + ":" + password;
    }
  } else {
    # nb: For /gmp we already know that we have logged in. In this case we don't need to do a second request like for /omp.
    if( '<help_response status="200" status_text="OK">' >< buf || buf =~ "<role>.+</role>" || buf =~ "<session>.+</session>" ) {
      vuln    = TRUE;
      report += '\n' + username + ":" + password;
    }
  }
}

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

exit( 99 );