Vulnerabilities > CVE-2008-4793 - Permissions, Privileges, and Access Controls vulnerability in Drupal

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
drupal
CWE-264
nessus

Summary

The node module API in Drupal 5.x before 5.11 allows remote attackers to bypass node validation and have unspecified other impact via unknown vectors related to contributed modules.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.

Nessus

  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_12EFC567987911DDA5E70030843D3802.NASL
    descriptionThe Drupal Project reports : A logic error in the core upload module validation allowed unprivileged users to attach files to content. Users can view files attached to content which they do not otherwise have access to. If the core upload module is not enabled, your site will not be affected. A deficiency in the user module allowed users who had been blocked by access rules to continue logging into the site under certain conditions. If you do not use the
    last seen2020-06-01
    modified2020-06-02
    plugin id34389
    published2008-10-13
    reporterThis script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/34389
    titleFreeBSD : drupal -- multiple vulnerabilities (12efc567-9879-11dd-a5e7-0030843d3802)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (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(34389);
      script_version("1.14");
      script_cvs_date("Date: 2019/08/02 13:32:39");
    
      script_cve_id("CVE-2008-4791", "CVE-2008-4792", "CVE-2008-4793");
      script_xref(name:"Secunia", value:"32198");
      script_xref(name:"Secunia", value:"32200");
      script_xref(name:"Secunia", value:"32201");
    
      script_name(english:"FreeBSD : drupal -- multiple vulnerabilities (12efc567-9879-11dd-a5e7-0030843d3802)");
      script_summary(english:"Checks for updated packages in pkg_info output");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote FreeBSD host is missing one or more security-related
    updates."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The Drupal Project reports :
    
    A logic error in the core upload module validation allowed
    unprivileged users to attach files to content. Users can view files
    attached to content which they do not otherwise have access to. If the
    core upload module is not enabled, your site will not be affected.
    
    A deficiency in the user module allowed users who had been blocked by
    access rules to continue logging into the site under certain
    conditions. If you do not use the 'access rules' functionality in
    core, your site will not be affected.
    
    The BlogAPI module does not implement correct validation for certain
    content fields, allowing for values to be set for fields which would
    otherwise be inaccessible on an internal Drupal form. We have hardened
    these checks in BlogAPI module for this release, but the security team
    would like to re-iterate that the 'Administer content with BlogAPI'
    permission should only be given to trusted users. If the core BlogAPI
    module is not enabled, your site will not be affected.
    
    A weakness in the node module API allowed for node validation to be
    bypassed in certain circumstances for contributed modules implementing
    the API. Additional checks have been added to ensure that validation
    is performed in all cases. This vulnerability only affects sites using
    one of a very small number of contributed modules, all of which will
    continue to work correctly with the improved API. None of them were
    found vulnerable, so our correction is a preventative measure."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"http://drupal.org/node/318706"
      );
      # https://vuxml.freebsd.org/freebsd/12efc567-9879-11dd-a5e7-0030843d3802.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?0c66e7a4"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      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_cwe_id(264);
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:drupal5");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:drupal6");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2008/10/08");
      script_set_attribute(attribute:"patch_publication_date", value:"2008/10/12");
      script_set_attribute(attribute:"plugin_publication_date", value:"2008/10/13");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2008-2019 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:"drupal5<5.11")) flag++;
    if (pkg_test(save_report:TRUE, pkg:"drupal6<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");
    
  • NASL familyCGI abuses
    NASL idDRUPAL_6_5.NASL
    descriptionThe version of Drupal running on the remote web server is 5.x prior to 5.11 or 6.x prior to 6.5. It is, therefore, affected by the following vulnerabilities: - The validation functionality in the core upload module in Drupal 6.x before 6.5 allows remote, authenticated users to bypass intended access restrictions and attach files to content, related to a logic error. (CVE-2008-4789) - The core upload module in Drupal 5.x before 5.11 allows remote authenticated users to bypass intended access restrictions and read files attached to content via unknown vectors.(CVE-2008-4790) - The user module in Drupal 5.x before 5.11 and 6.x before 6.5 allows remote authenticated users to bypass intended login access rules and successfully login via unknown vectors.(CVE-2008-4791) - The core BlogAPI module in Drupal 5.x before 5.11 and 6.x before 6.5 does not properly validate unspecified content fields of an internal Drupal form, which allows remote, authenticated users to bypass intended access restrictions via modified field values. (CVE-2008-4792) - The node module API in Drupal 5.x before 5.11 allows remote attackers to bypass node validation and have unspecified other impact via unknown vectors related to contributed modules. (CVE-2008-4793) Note that Nessus has not tested for these issues but has instead relied only on the application
    last seen2020-04-01
    modified2020-03-30
    plugin id134979
    published2020-03-30
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134979
    titleDrupal 5.x < 5.11 / 6.x < 6.5 Multiple Vulnerabilities (SA-2008-060)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include('compat.inc');
    
    if (description)
    {
      script_id(134979);
      script_version("1.2");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/31");
    
      script_cve_id(
        "CVE-2008-4789",
        "CVE-2008-4790",
        "CVE-2008-4791",
        "CVE-2008-4792",
        "CVE-2008-4793"
      );
      script_bugtraq_id(
        84731,
        84742,
        84753,
        84778,
        84780
      );
    
      script_name(english:"Drupal 5.x < 5.11 / 6.x < 6.5 Multiple Vulnerabilities (SA-2008-060)");
    
      script_set_attribute(attribute:"synopsis", value:
    "The PHP application running on the remote web server is affected by multiple vulnerabilities.");
      script_set_attribute(attribute:"description", value:
    "The version of Drupal running on the remote web server is 5.x prior to 5.11 or 6.x prior to 6.5. It is, therefore,
    affected by the following vulnerabilities:
    
      - The validation functionality in the core upload module in Drupal 6.x before 6.5 allows remote,
        authenticated users to bypass intended access restrictions and attach files to content, related to a
        logic error. (CVE-2008-4789)
      
      - The core upload module in Drupal 5.x before 5.11 allows remote authenticated users to bypass intended
        access restrictions and read files attached to content via unknown vectors.(CVE-2008-4790)
    
      - The user module in Drupal 5.x before 5.11 and 6.x before 6.5 allows remote authenticated users to bypass
        intended login access rules and successfully login via unknown vectors.(CVE-2008-4791)
    
      - The core BlogAPI module in Drupal 5.x before 5.11 and 6.x before 6.5 does not properly validate
        unspecified content fields of an internal Drupal form, which allows remote, authenticated users to bypass
        intended access restrictions via modified field values. (CVE-2008-4792)
    
      - The node module API in Drupal 5.x before 5.11 allows remote attackers to bypass node validation and have
        unspecified other impact via unknown vectors related to contributed modules. (CVE-2008-4793)
    
    Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
    number.");
      script_set_attribute(attribute:"see_also", value:"https://www.drupal.org/node/318706");
      script_set_attribute(attribute:"see_also", value:"https://www.drupal.org/project/drupal/releases/5.11");
      script_set_attribute(attribute:"see_also", value:"https://www.drupal.org/project/drupal/releases/6.5");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Drupal version 5.11, 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:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2008-4793");
    
      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:"2008/10/08");
      script_set_attribute(attribute:"patch_publication_date", value:"2008/10/08");
      script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/30");
    
      script_set_attribute(attribute:"potential_vulnerability", value:"true");
      script_set_attribute(attribute:"plugin_type", value:"remote");
      script_set_attribute(attribute:"cpe", value:"cpe:/a:drupal:drupal");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"CGI abuses");
    
      script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("drupal_detect.nasl");
      script_require_keys("www/PHP", "installed_sw/Drupal", "Settings/ParanoidReport");
      script_require_ports("Services/www", 80, 443);
    
      exit(0);
    }
    
    include('vcf.inc');
    include('http.inc');
    
    if (report_paranoia < 2) audit(AUDIT_PARANOID);
    
    port = get_http_port(default:80, php:TRUE);
    
    app_info = vcf::get_app_info(app:'Drupal', port:port, webapp:true);
    
    vcf::check_granularity(app_info:app_info, sig_segments:2);
    
    constraints = [
      { 'min_version' : '5.0', 'fixed_version' : '5.11' },
      { 'min_version' : '6.0', 'fixed_version' : '6.5' }
    ];
    
    vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);