Vulnerabilities > CVE-2016-9838 - Improper Access Control vulnerability in Joomla Joomla!

#
# (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(96059);
  script_version("3.5");
  script_cvs_date("Date: 2019/04/11 17:23:06");

  script_cve_id("CVE-2016-9836", "CVE-2016-9837", "CVE-2016-9838");

  script_name(english:"FreeBSD : Joomla! -- multiple vulnerabilities (624b45c0-c7f3-11e6-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 : [20161201] - Core -
Elevated Privileges Incorrect use of unfiltered data stored to the
session on a form validation failure allows for existing user accounts
to be modified; to include resetting their username, password, and
user group assignments. [20161202] - Core - Shell Upload Inadequate
filesystem checks allowed files with alternative PHP file extensions
to be uploaded. [20161203] - Core - Information Disclosure Inadequate
ACL checks in the Beez3 com_content article layout override enables a
user to view restricted content."
  );
  # https://developer.joomla.org/security-centre/664-20161201-core-elevated-privileges.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?7934a324"
  );
  # https://developer.joomla.org/security-centre/665-20161202-core-shell-upload.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?6c4c5a5e"
  );
  # https://developer.joomla.org/security-centre/666-20161203-core-information-disclosure.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?a397aea4"
  );
  # https://www.joomla.org/announcements/release-news/5693-joomla-3-6-5-released.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?3ca7356f"
  );
  # https://vuxml.freebsd.org/freebsd/624b45c0-c7f3-11e6-ae1b-002590263bf5.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?4b66e4e1"
  );
  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:POC/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:P/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:"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:"2016/12/06");
  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>=1.6.0<3.6.5")) 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");

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

include("compat.inc");

if (description)
{
  script_id(95916);
  script_version("1.8");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id("CVE-2016-9836", "CVE-2016-9837", "CVE-2016-9838");
  script_bugtraq_id(94663, 94892, 94893);

  script_name(english:"Joomla! < 3.6.5 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 prior to 3.6.5. It
is, therefore, affected by multiple vulnerabilities :

  - A flaw exists in the JFilterInput::isFileSafe() function
    due to improper validation of file types and extensions
    of uploaded files before placing them in a
    user-accessible path. An unauthenticated, remote
    attacker can exploit this issue, by uploading a
    specially crafted file using an alternative PHP
    extension and then requesting it, to execute arbitrary
    code with the privileges of the web service. Note that
    this issue affects versions 3.0.0 to 3.6.4.
    (CVE-2016-9836)

  - An information disclosure vulnerability exists in the
    Beez3 com_content article layout override due to
    inadequate access control list (ACL) checks. An
    authenticated, remote attacker can exploit this to
    disclose restricted content. Note that this issue
    affects versions 3.0.0 to 3.6.4. (CVE-2016-9837)

  - A privilege escalation vulnerability exists due to
    improper validation of form data before storing it in
    the session. An authenticated, remote attacker can
    exploit this, via a specially crafted request, to modify
    existing user accounts, such as resetting credentials or
    group assignments. (CVE-2016-9838)

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/5693-joomla-3-6-5-released.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3ca7356f");
  # https://developer.joomla.org/security-centre/664-20161201-core-elevated-privileges.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7934a324");
  # https://developer.joomla.org/security-centre/665-20161202-core-shell-upload.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6c4c5a5e");
  # https://developer.joomla.org/security-centre/666-20161203-core-information-disclosure.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a397aea4");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Joomla! version 3.6.5 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:U/RC:ND");
  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:U/RC:X");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-9836");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/10/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/16");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:joomla:joomla\!");
  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 = "3.6.5";

# 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);

# Version 1.6.0 - 3.6.4 vulnerable to privilege escalation
# https://developer.joomla.org/security-centre/664-20161201-core-elevated-privileges.html
if (ver_compare(ver:numeric, minver:"1.6.0", fix:fix, 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);