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openvasCopyright (C) 2015 Greenbone Networks GmbHOPENVAS:1361412562310105354
HistorySep 14, 2015 - 12:00 a.m.

Greenbone Security Assistant (GSA) Default Credentials

2015-09-1400:00:00
Copyright (C) 2015 Greenbone Networks GmbH
plugins.openvas.org
1158

The remote Greenbone Security Assistant is installed/configured
in a way that it has account(s) with default passwords enabled.

###############################################################################
# OpenVAS Vulnerability Test
#
# Greenbone Security Assistant (GSA) Default Credentials
#
# Authors:
# Michael Meyer <[email protected]>
#
# Copyright:
# Copyright (C) 2015 Greenbone Networks GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################

CPE = "cpe:/a:greenbone:greenbone_security_assistant";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105354");
  script_version("2020-04-12T08:18:11+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:"2020-04-12 08:18:11 +0000 (Sun, 12 Apr 2020)");
  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");
  script_category(ACT_ATTACK);
  script_family("Default Accounts");
  script_copyright("Copyright (C) 2015 Greenbone Networks GmbH");
  script_dependencies("gb_gsa_detect.nasl", "gb_default_credentials_options.nasl");
  script_require_ports("Services/www", 80, 443, 9392);
  script_mandatory_keys("greenbone_security_assistant/detected");
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_tag(name:"summary", value:"The remote Greenbone Security Assistant 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:"Try to login with default credentials.");

  script_tag(name:"insight", value:"It was possible to login with default credentials: admin/admin,
  sadmin/changeme, observer/observer or admin/openvas");

  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_security_assistant/" + port + "/gmp" ) ) {
  url = dir + "/gmp";
  is_omp = FALSE;
} else {
  url = dir + "/omp";
  is_omp = TRUE;
}

creds = make_array( "admin", "admin", # OpenVAS Virtual Appliance
                    "sadmin", "changeme", # Docker image from https://github.com/falegk/openvas_pg#usage
                    "Admin", "openvas", # nb: The username is "admin" but the uppercase "A" is used here to have a different array index. Docker image from https://github.com/mikesplain/openvas-docker#usage
                    "observer", "observer", # The ones below might be used from time to time out there.
                    "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 comment 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 and 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 );