Vulnerabilities > CVE-2018-15882 - Unrestricted Upload of File with Dangerous Type vulnerability in Joomla Joomla!

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
joomla
CWE-434
critical
nessus

Summary

An issue was discovered in Joomla! before 3.8.12. Inadequate checks in the InputFilter class could allow specifically prepared phar files to pass the upload filter.

Vulnerable Configurations

Part Description Count
Application
Joomla
302

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing Functionality Not Properly Constrained by ACLs
    In applications, particularly web applications, access to functionality is mitigated by the authorization framework, whose job it is to map ACLs to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application or can run queries for data that he is otherwise not supposed to.
  • Privilege Abuse
    An adversary is able to exploit features of the target that should be reserved for privileged users or administrators but are exposed to use by lower or non-privileged accounts. Access to sensitive information and functionality must be controlled to ensure that only authorized users are able to access these resources. If access control mechanisms are absent or misconfigured, a user may be able to access resources that are intended only for higher level users. An adversary may be able to exploit this to utilize a less trusted account to gain information and perform activities reserved for more trusted accounts. This attack differs from privilege escalation and other privilege stealing attacks in that the adversary never actually escalates their privileges but instead is able to use a lesser degree of privilege to access resources that should be (but are not) reserved for higher privilege accounts. Likewise, the adversary does not exploit trust or subvert systems - all control functionality is working as configured but the configuration does not adequately protect sensitive resources at an appropriate level.

Nessus

  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_BF2B9C56B93E11E8B2A8A4BADB296695.NASL
    descriptionJSST reports: Multiple low-priority Vulnerabilities Inadequate checks in the InputFilter class could allow specifically prepared PHAR files to pass the upload filter. Inadequate output filtering on the user profile page could lead to a stored XSS attack. Inadequate checks regarding disabled fields can lead to an ACL violation.
    last seen2020-06-01
    modified2020-06-02
    plugin id117511
    published2018-09-17
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/117511
    titleFreeBSD : joomla3 -- vulnerabilitiesw (bf2b9c56-b93e-11e8-b2a8-a4badb296695)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from the FreeBSD VuXML database :
    #
    # Copyright 2003-2019 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(117511);
      script_version("1.5");
      script_cvs_date("Date: 2019/10/11 10:17:50");
    
      script_cve_id("CVE-2018-15860", "CVE-2018-15880", "CVE-2018-15881", "CVE-2018-15882");
    
      script_name(english:"FreeBSD : joomla3 -- vulnerabilitiesw (bf2b9c56-b93e-11e8-b2a8-a4badb296695)");
      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:
    "JSST reports: Multiple low-priority Vulnerabilities
    
    Inadequate checks in the InputFilter class could allow specifically
    prepared PHAR files to pass the upload filter.
    
    Inadequate output filtering on the user profile page could lead to a
    stored XSS attack.
    
    Inadequate checks regarding disabled fields can lead to an ACL
    violation."
      );
      # https://developer.joomla.org/security-centre/743-20180801-core-hardening-the-inputfilter-for-phar-stubs.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?1f83f6ac"
      );
      # https://developer.joomla.org/security-centre/744-20180802-core-stored-xss-vulnerability-in-the-frontend-profile.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?8540ce43"
      );
      # https://developer.joomla.org/security-centre/745-20180803-core-acl-violation-in-custom-fields.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?e75ac96b"
      );
      # https://vuxml.freebsd.org/freebsd/bf2b9c56-b93e-11e8-b2a8-a4badb296695.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?aa355326"
      );
      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_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
    
      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:"2018/08/23");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/09/15");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/17");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2019 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<3.8.12")) 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");
    
  • NASL familyCGI abuses
    NASL idJOOMLA_3812.NASL
    descriptionAccording to its self-reported version number, the Joomla! installation running on the remote web server is prior to 3.8.12. It is, therefore, affected by malicious file upload and stored cross-site scripting vulnerabilities. Additionally, versions 3.7.0 through 3.8.11 are affected by an access control list violation vulnerability. Note that Nessus has not attempted to exploit these issues but has instead relied only on the application
    last seen2020-06-01
    modified2020-06-02
    plugin id112160
    published2018-08-28
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/112160
    titleJoomla! < 3.8.12 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(112160);
      script_version("1.6");
      script_cvs_date("Date: 2019/11/04");
    
      script_cve_id("CVE-2018-15880", "CVE-2018-15881", "CVE-2018-15882");
      script_bugtraq_id(105161, 105164, 105166);
    
      script_name(english:"Joomla! < 3.8.12 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 3.8.12. It
    is, therefore, affected by malicious file upload and stored cross-site
    scripting vulnerabilities. Additionally, versions 3.7.0 through 3.8.11
    are affected by an access control list violation vulnerability.
    
    Note that Nessus has not attempted to exploit these issues but has
    instead relied only on the application's self-reported version number.");
      # https://www.joomla.org/announcements/release-news/5743-joomla-3-8-12-release.html
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b0792312");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Joomla! version 3.8.12 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-2018-15882");
    
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/07/10");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/08/28");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/28");
    
      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) 2018-2019 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("http.inc");
    include("vcf.inc");
    
    port = get_http_port(default:80, php:TRUE);
    
    if (report_paranoia < 2) audit(AUDIT_PARANOID);
    
    app_info = vcf::get_app_info(app:"Joomla!", port:port, webapp:TRUE);
    
    vcf::check_granularity(app_info:app_info, sig_segments:3);
    
    constraints = [
      { "min_version" : "1.5.0", "fixed_version" : "3.8.12" }
    ];
    
    vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE, flags:{xss:TRUE});