ManageEngine Applications Manager REST API SQLi

#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(144793);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/08");

  script_cve_id("CVE-2020-15394");

  script_name(english:"ManageEngine Applications Manager REST API SQLi");

  script_set_attribute(attribute:"synopsis", value:
"The remote web application is affected by a SQL injection
vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote host is running a version of ManageEngine Applications
Manager that is affected by a SQL injection vulnerability due to
improper validation of user-supplied input to the 'APIServlet'
servlet. An unauthenticated, remote attacker can exploit this, via a
specially crafted HTTP message to execute arbitrary SQL statements.");
  # https://www.manageengine.com/products/applications_manager/security-updates/security-updates-cve-2020-15394.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?87166a26");
  script_set_attribute(attribute:"solution", value:
"Upgrade to ManageEngine Applications Manager build 14740 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-15394");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/09/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/09/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/01/07");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:zohocorp:manageengine_applications_manager");
  script_end_attributes();

  script_category(ACT_ATTACK);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("manageengine_applications_manager_detect.nasl");
  script_require_keys("installed_sw/ManageEngine Applications Manager");
  script_require_ports("Services/www", 9090);

  exit(0);
}

include('http.inc');
include('install_func.inc');

app = 'ManageEngine Applications Manager';

# Exit if app is not detected on host
get_install_count(app_name:app, exit_if_zero:TRUE);

# Exit if app is not detected on this http port
port = get_http_port(default:9090);
install = get_single_install(
  app_name : app,
  port     : port
);

id = '123456789';
data = 'resourceIds=' + id;
url  = '/AppManager/json/ApmAdminServices/checkResourceID';

res = http_send_recv3(
  method : 'POST',
  port   : port,
  item   : url,
  data   : data,
  content_type : 'application/x-www-form-urlencoded',
  exit_on_fail : TRUE
);

# Patched server requires authentication for the url
if ('provide API Key' >< res[2])
{
  dir = install['path'];
  dir = dir - '/index.do';
  install_url = build_url(port:port, qs:dir);
  audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url);
}
# Vulnerable server doesn't require authentication for the url and
# further processes the request. The supplied resourceIds are
# reflected back in the response.
else if(id >< res[2])
{
  extra = 'Nessus was able to detect the issue by sending the' +
    ' following HTTP request to the remote host : ' +
    '\n' +
    '\n' +
    http_last_sent_request();
  security_report_v4(
    port        : port,
    severity    : SECURITY_HOLE,
    extra       : extra,
    sqli        : TRUE
  );
}
# Unexpected
else
  audit(AUDIT_RESP_BAD, port, 'an HTTP request. Response: \n' + res[2]);