Vulnerabilities > CVE-2016-8870 - Improper Input Validation vulnerability in Joomla Joomla!

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

include("compat.inc");

if (description)
{
  script_id(94355);
  script_version("1.11");
  script_cvs_date("Date: 2019/04/11 17:23:06");

  script_cve_id(
    "CVE-2016-8869",
    "CVE-2016-8870",
    "CVE-2016-9081"
  );
  script_bugtraq_id(
    93883,
    93876,
    93969
  );
  script_xref(name:"EDB-ID", value:"40637");

  script_name(english:"Joomla! 3.4.4 < 3.6.4 Multiple Vulnerabilities");
  script_summary(english:"Checks the version of Joomla!.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP application that is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the Joomla!
installation running on the remote web server is 3.4.4 or later but
prior to 3.6.4. It is, therefore, affected by multiple
vulnerabilities :

  - A privilege escalation vulnerability exists in the
    Joomla! core user registration component due to improper
    processing of unfiltered data. An unauthenticated,
    remote attacker can exploit this, via a specially
    crafted request, to register an account on a Joomla!
    site with elevated privileges. (CVE-2016-8869)

  - A security bypass vulnerability exists in the Joomla!
    core user registration component due to insufficient
    checks on whether user registration is disabled. An
    unauthenticated, remote attacker can exploit this, via a
    specially crafted request, to register an account on a
    Joomla! site even when account registration has been
    disabled. (CVE-2016-8870)

  - A flaw exists in the Joomla! core user modification
    component due to the improper processing of unfiltered
    data. An attacker can exploit this to modify the
    username, password, and user group for existing user
    accounts. (CVE-2016-9081)

Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.");
  # https://www.joomla.org/announcements/release-news/5678-joomla-3-6-4-released.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?deb43b12");
  # https://developer.joomla.org/security-centre/660-20161002-core-elevated-privileges.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?80833723");
  # https://developer.joomla.org/security-centre/659-20161001-core-account-creation.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ba9590d8");
  # https://developer.joomla.org/security-centre/661-20161003-core-account-modifications.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2094b6a9");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Joomla! version 3.6.4 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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/10/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/10/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/10/28");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:joomla:joomla\!");
  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("joomla_detect.nasl");
  script_require_keys("installed_sw/Joomla!", "www/PHP", "Settings/ParanoidReport");
  script_require_ports("Services/www", 80);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("http.inc");
include("install_func.inc");
include("misc_func.inc");

app = "Joomla!";
get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:80, php:TRUE);

install = get_single_install(
  app_name : app,
  port     : port,
  exit_if_unknown_ver : TRUE
);

if (report_paranoia < 2) audit(AUDIT_PARANOID);

dir = install["path"];
install_loc =  build_url(port:port, qs:dir);
version = install['version'];

fix = "3.6.4";

# Pull out the purely numeric version
numeric = eregmatch(string:version, pattern:"^([0-9\.]+)($|[^0-9])");

if (empty_or_null(numeric))
  audit(AUDIT_UNKNOWN_WEB_APP_VER, app, install_loc);

numeric = numeric[1];

parts = split(numeric, sep:".", keep:FALSE);

if (len(parts) < 3) audit(AUDIT_VER_NOT_GRANULAR, app, version);

if (ver_compare(ver:numeric, fix:fix, strict:FALSE) < 0 &&
    ver_compare(ver:numeric, fix:"3.4.4", strict:FALSE) >= 0)
{
  report =
    '\n  URL               : ' +install_loc+
    '\n  Installed version : ' +version+
    '\n  Fixed version     : ' +fix+
    '\n';

  security_report_v4(
    port:port,
    extra:report,
    severity:SECURITY_HOLE);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_loc, version);

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2018 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(96060);
  script_version("3.3");
  script_cvs_date("Date: 2019/04/11 17:23:06");

  script_cve_id("CVE-2016-8869", "CVE-2016-8870", "CVE-2016-9081");

  script_name(english:"FreeBSD : Joomla! -- multiple vulnerabilities (a27d234a-c7f2-11e6-ae1b-002590263bf5)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The JSST and the Joomla! Security Center report : [20161001] - Core -
Account Creation Inadequate checks allows for users to register on a
site when registration has been disabled. [20161002] - Core - Elevated
Privilege Incorrect use of unfiltered data allows for users to
register on a site with elevated privileges. [20161003] - Core -
Account Modifications Incorrect use of unfiltered data allows for
existing user accounts to be modified; to include resetting their
username, password, and user group assignments."
  );
  # https://developer.joomla.org/security-centre/659-20161001-core-account-creation.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?ba9590d8"
  );
  # https://developer.joomla.org/security-centre/660-20161002-core-elevated-privileges.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?80833723"
  );
  # https://developer.joomla.org/security-centre/661-20161003-core-account-modifications.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?2094b6a9"
  );
  # https://www.joomla.org/announcements/release-news/5678-joomla-3-6-4-released.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?deb43b12"
  );
  # https://vuxml.freebsd.org/freebsd/a27d234a-c7f2-11e6-ae1b-002590263bf5.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?eddc58b2"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:joomla3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/10/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/22");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"joomla3>=3.4.4<3.6.4")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:pkg_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");