Joomla! Core Two-factor Authentication Bypass Vulnerability (Nov 2017)

# SPDX-FileCopyrightText: 2017 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:joomla:joomla";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.811897");
  script_version("2026-04-30T06:27:06+0000");
  script_cve_id("CVE-2017-16634");
  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:"severity_vector", value:"CVSS:3.0/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:"2017-11-28 17:20:00 +0000 (Tue, 28 Nov 2017)");
  script_tag(name:"creation_date", value:"2017-11-08 10:36:51 +0530 (Wed, 08 Nov 2017)");
  script_name("Joomla! Core Two-factor Authentication Bypass Vulnerability (Nov 2017)");

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

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"The flaw exists due to an error related to
  2-factor-authentication method.");

  script_tag(name:"impact", value:"Successfully exploiting this issue will allow
  remote attackers to bypass certain security restrictions and perform unauthorized
  actions, this may aid in launching further attacks.");

  script_tag(name:"affected", value:"Joomla core version 3.2.0 through 3.8.1");

  script_tag(name:"solution", value:"Upgrade to Joomla version 3.8.2 or later.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"remote_banner");
  script_xref(name:"URL", value:"https://developer.joomla.org/security-centre/713-20171102-core-2-factor-authentication-bypass.html");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/101701");
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_category(ACT_GATHER_INFO);
  script_family("Web application abuses");
  script_dependencies("joomla_http_detect.nasl");
  script_mandatory_keys("joomla/detected");
  exit(0);
}

include("version_func.inc");
include("host_details.inc");

if(!jPort = get_app_port(cpe:CPE)){
  exit(0);
}

if(!jVer = get_app_version(cpe:CPE, port:jPort)){
  exit(0);
}

if(jVer =~ "^(3\.)")
{
  if(version_in_range(version:jVer, test_version:"3.2.0", test_version2:"3.8.1"))
  {
    report = report_fixed_ver( installed_version:jVer, fixed_version:"3.8.2");
    security_message( data:report, port:jPort);
    exit(0);
  }
}
exit(0);