Vulnerabilities > CVE-2017-6379 - Cross-Site Request Forgery (CSRF) vulnerability in Drupal
Attack vector
NETWORK Attack complexity
HIGH Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Some administrative paths in Drupal 8.2.x before 8.2.7 did not include protection for CSRF. This would allow an attacker to disable some blocks on a site. This issue is mitigated by the fact that users would have to know the block ID.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 12 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- JSON Hijacking (aka JavaScript Hijacking) An attacker targets a system that uses JavaScript Object Notation (JSON) as a transport mechanism between the client and the server (common in Web 2.0 systems using AJAX) to steal possibly confidential information transmitted from the server back to the client inside the JSON object by taking advantage of the loophole in the browser's Same Origin Policy that does not prohibit JavaScript from one website to be included and executed in the context of another website. An attacker gets the victim to visit his or her malicious page that contains a script tag whose source points to the vulnerable system with a URL that requests a response from the server containing a JSON object with possibly confidential information. The malicious page also contains malicious code to capture the JSON object returned by the server before any other processing on it can take place, typically by overriding the JavaScript function used to create new objects. This hook allows the malicious code to get access to the creation of each object and transmit the possibly sensitive contents of the captured JSON object to the attackers' server. There is nothing in the browser's security model to prevent the attackers' malicious JavaScript code (originating from attacker's domain) to set up an environment (as described above) to intercept a JSON object response (coming from the vulnerable target system's domain), read its contents and transmit to the attackers' controlled site. The same origin policy protects the domain object model (DOM), but not the JSON.
- Cross-Domain Search Timing An attacker initiates cross domain HTTP / GET requests and times the server responses. The timing of these responses may leak important information on what is happening on the server. Browser's same origin policy prevents the attacker from directly reading the server responses (in the absence of any other weaknesses), but does not prevent the attacker from timing the responses to requests that the attacker issued cross domain. For GET requests an attacker could for instance leverage the "img" tag in conjunction with "onload() / onerror()" javascript events. For the POST requests, an attacker could leverage the "iframe" element and leverage the "onload()" event. There is nothing in the current browser security model that prevents an attacker to use these methods to time responses to the attackers' cross domain requests. The timing for these responses leaks information. For instance, if a victim has an active session with their online e-mail account, an attacker could issue search requests in the victim's mailbox. While the attacker is not able to view the responses, based on the timings of the responses, the attacker could ask yes / no questions as to the content of victim's e-mails, who the victim e-mailed, when, etc. This is but one example; There are other scenarios where an attacker could infer potentially sensitive information from cross domain requests by timing the responses while asking the right questions that leak information.
- Cross Site Identification An attacker harvests identifying information about a victim via an active session that the victim's browser has with a social networking site. A victim may have the social networking site open in one tab or perhaps is simply using the "remember me" feature to keep his or her session with the social networking site active. An attacker induces a payload to execute in the victim's browser that transparently to the victim initiates a request to the social networking site (e.g., via available social network site APIs) to retrieve identifying information about a victim. While some of this information may be public, the attacker is able to harvest this information in context and may use it for further attacks on the user (e.g., spear phishing). In one example of an attack, an attacker may post a malicious posting that contains an image with an embedded link. The link actually requests identifying information from the social networking site. A victim who views the malicious posting in his or her browser will have sent identifying information to the attacker, as long as the victim had an active session with the social networking site. There are many other ways in which the attacker may get the payload to execute in the victim's browser mainly by finding a way to hide it in some reputable site that the victim visits. The attacker could also send the link to the victim in an e-mail and trick the victim into clicking on the link. This attack is basically a cross site request forgery attack with two main differences. First, there is no action that is performed on behalf of the user aside from harvesting information. So standard CSRF protection may not work in this situation. Second, what is important in this attack pattern is the nature of the data being harvested, which is identifying information that can be obtained and used in context. This real time harvesting of identifying information can be used as a prelude for launching real time targeted social engineering attacks on the victim.
- Cross Site Request Forgery (aka Session Riding) An attacker crafts malicious web links and distributes them (via web pages, email, etc.), typically in a targeted manner, hoping to induce users to click on the link and execute the malicious action against some third-party application. If successful, the action embedded in the malicious link will be processed and accepted by the targeted application with the users' privilege level. This type of attack leverages the persistence and implicit trust placed in user session cookies by many web applications today. In such an architecture, once the user authenticates to an application and a session cookie is created on the user's system, all following transactions for that session are authenticated using that cookie including potential actions initiated by an attacker and simply "riding" the existing session cookie.
Nessus
NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_2730C6680B1C11E78D526CF0497DB129.NASL description Drupal Security Team reports : CVE-2017-6377: Editor module incorrectly checks access to inline private files CVE-2017-6379: Some admin paths were not protected with a CSRF token CVE-2017-6381: Remote code execution last seen 2020-06-01 modified 2020-06-02 plugin id 97808 published 2017-03-20 reporter This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/97808 title FreeBSD : drupal8 -- multiple vulnerabilities (2730c668-0b1c-11e7-8d52-6cf0497db129) code # # (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(97808); script_version("3.8"); script_cvs_date("Date: 2018/12/19 13:21:18"); script_cve_id("CVE-2017-6377", "CVE-2017-6379", "CVE-2017-6381"); script_name(english:"FreeBSD : drupal8 -- multiple vulnerabilities (2730c668-0b1c-11e7-8d52-6cf0497db129)"); 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: "Drupal Security Team reports : CVE-2017-6377: Editor module incorrectly checks access to inline private files CVE-2017-6379: Some admin paths were not protected with a CSRF token CVE-2017-6381: Remote code execution" ); # https://www.drupal.org/SA-2017-001 script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?aba24102" ); # https://vuxml.freebsd.org/freebsd/2730c668-0b1c-11e7-8d52-6cf0497db129.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?06b93036" ); script_set_attribute(attribute:"solution", value:"Update the affected package."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/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:drupal8"); script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd"); script_set_attribute(attribute:"vuln_publication_date", value:"2017/03/15"); script_set_attribute(attribute:"patch_publication_date", value:"2017/03/17"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/20"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2017-2018 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:"drupal8<8.2.7")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");NASL family CGI abuses NASL id DRUPAL_8_2_7.NASL description The version of Drupal running on the remote web server is 8.x prior to 8.2.7. It is, therefore, affected by the multiple vulnerabilities : - A security bypass vulnerability exists in the editor module due to a failure to properly check access restrictions when adding private files with a configured text editor (e.g. CKEDITOR). An unauthenticated, remote attacker can exploit this to bypass access restrictions and disclose arbitrary files. (CVE-2017-6377) - A cross-site request forgery (XSRF) vulnerability exists as HTTP requests do not require multiple steps, explicit confirmation, or a unique token when performing certain sensitive actions. An unauthenticated, remote attacker can exploit this, by convincing a user to follow a specially crafted link, to cause the user to disable some blocks on sites or perform additional unintended actions. (CVE-2017-6379) - An unspecified flaw exists in the PHPUnit component that allows an unauthenticated, remote attacker to execute arbitrary code. Note that this vulnerability may only impact versions prior to 8.2.2. (CVE-2017-6381) Note that Nessus has not tested for these issues but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 97942 published 2017-03-24 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/97942 title Drupal 8.x < 8.2.7 Multiple Vulnerabilities (SA-2017-001) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(97942); script_version("1.7"); script_cvs_date("Date: 2019/11/13"); script_cve_id("CVE-2017-6377", "CVE-2017-6379", "CVE-2017-6381"); script_bugtraq_id(96919); script_name(english:"Drupal 8.x < 8.2.7 Multiple Vulnerabilities (SA-2017-001)"); script_summary(english:"Checks the version of Drupal."); script_set_attribute(attribute:"synopsis", value: "A 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 8.x prior to 8.2.7. It is, therefore, affected by the multiple vulnerabilities : - A security bypass vulnerability exists in the editor module due to a failure to properly check access restrictions when adding private files with a configured text editor (e.g. CKEDITOR). An unauthenticated, remote attacker can exploit this to bypass access restrictions and disclose arbitrary files. (CVE-2017-6377) - A cross-site request forgery (XSRF) vulnerability exists as HTTP requests do not require multiple steps, explicit confirmation, or a unique token when performing certain sensitive actions. An unauthenticated, remote attacker can exploit this, by convincing a user to follow a specially crafted link, to cause the user to disable some blocks on sites or perform additional unintended actions. (CVE-2017-6379) - An unspecified flaw exists in the PHPUnit component that allows an unauthenticated, remote attacker to execute arbitrary code. Note that this vulnerability may only impact versions prior to 8.2.2. (CVE-2017-6381) 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/SA-2017-001"); script_set_attribute(attribute:"see_also", value:"https://www.drupal.org/project/drupal/releases/8.2.7"); script_set_attribute(attribute:"solution", value: "Upgrade to Drupal version 8.2.7 or later. Additionally, as a workaround for CVE-2017-6381, remove the /vendor/phpunit directory."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:ND"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/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:X"); 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:"2017/03/15"); script_set_attribute(attribute:"patch_publication_date", value:"2017/03/15"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/24"); 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) 2017-2019 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("audit.inc"); include("global_settings.inc"); include("misc_func.inc"); include("http.inc"); include("install_func.inc"); app = "Drupal"; get_install_count(app_name:app, exit_if_zero:TRUE); if (report_paranoia < 2) audit(AUDIT_PARANOID); port = get_http_port(default:80, php:TRUE); install = get_single_install( app_name : app, port : port, exit_if_unknown_ver : TRUE ); dir = install['path']; version = install['version']; url = build_url(qs:dir, port:port); fix = NULL; if (version == "8") audit(AUDIT_VER_NOT_GRANULAR, app, port, version); if (ver_compare(ver:version, minver:"8.0", fix:"8.2.7", strict:FALSE) < 0) fix = "8.2.7"; if (isnull(fix)) audit(AUDIT_WEB_APP_NOT_AFFECTED, app, url, version); security_report_v4( port:port, severity:SECURITY_WARNING, xsrf:TRUE, extra: '\n URL : ' + url + '\n Installed version : ' + version + '\n Fixed version : ' + fix + '\n' );