Vulnerabilities > CVE-2017-9064 - Cross-Site Request Forgery (CSRF) vulnerability in Wordpress

047910
CVSS 6.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
wordpress
debian
CWE-352
nessus
NVD
Published: 2017-05-18
Updated: 2019-03-15

Summary

In WordPress before 4.7.5, a Cross Site Request Forgery (CSRF) vulnerability exists in the filesystem credentials dialog because a nonce is not required for updating credentials.

Vulnerable Configurations

Part Description Count
Application
Wordpress
605
OS
Debian
2

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 familyDebian Local Security Checks
    NASL idDEBIAN_DLA-975.NASL
    descriptionSeveral vulnerabilities were discovered in wordpress, a web blogging tool. The Common Vulnerabilities and Exposures project identifies the following issues. CVE-2017-8295 Potential unauthorized password reset vulnerability. More information are available at : https://exploitbox.io/vuln/WordPress-Exploit-4-7-Unauth-Password-Reset -0day-CVE-2017-8295.html CVE-2017-9061 A cross-site scripting (XSS) vulnerability exists when someone attempts to upload very large files. CVE-2017-9062 Improper handling of post meta data values in the XML-RPC API. CVE-2017-9063 Cross-site scripting (XSS) vulnerability in the customizer. CVE-2017-9064 A Cross Site Request Forgery (CSRF) vulnerability exists in the filesystem credentials dialog. CVE-2017-9065 Lack of capability checks for post meta data in the XML-RPC API. For Debian 7
    last seen2020-03-17
    modified2017-06-05
    plugin id100602
    published2017-06-05
    reporterThis script is Copyright (C) 2017-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/100602
    titleDebian DLA-975-1 : wordpress security update
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-975-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(100602);
  script_version("3.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2017-8295", "CVE-2017-9061", "CVE-2017-9062", "CVE-2017-9063", "CVE-2017-9064", "CVE-2017-9065");

  script_name(english:"Debian DLA-975-1 : wordpress security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Several vulnerabilities were discovered in wordpress, a web blogging
tool. The Common Vulnerabilities and Exposures project identifies the
following issues.

CVE-2017-8295

Potential unauthorized password reset vulnerability. More information
are available at :

https://exploitbox.io/vuln/WordPress-Exploit-4-7-Unauth-Password-Reset
-0day-CVE-2017-8295.html

CVE-2017-9061

A cross-site scripting (XSS) vulnerability exists when someone
attempts to upload very large files.

CVE-2017-9062

Improper handling of post meta data values in the XML-RPC API.

CVE-2017-9063

Cross-site scripting (XSS) vulnerability in the customizer.

CVE-2017-9064

A Cross Site Request Forgery (CSRF) vulnerability exists in the
filesystem credentials dialog.

CVE-2017-9065

Lack of capability checks for post meta data in the XML-RPC API.

For Debian 7 'Wheezy', these problems have been fixed in version
3.6.1+dfsg-1~deb7u15.

We recommend that you upgrade your wordpress packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  # https://exploitbox.io/vuln/WordPress-Exploit-4-7-Unauth-Password-Reset-0day-CVE-2017-8295.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?5a4aa4f1"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2017/06/msg00004.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/wordpress"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected wordpress, and wordpress-l10n packages."
  );
  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:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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:debian:debian_linux:wordpress");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:wordpress-l10n");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/06/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/05");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 Tenable Network Security, Inc.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"7.0", prefix:"wordpress", reference:"3.6.1+dfsg-1~deb7u15")) flag++;
if (deb_check(release:"7.0", prefix:"wordpress-l10n", reference:"3.6.1+dfsg-1~deb7u15")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3870.NASL
    descriptionSeveral vulnerabilities were discovered in wordpress, a web blogging tool. They would allow remote attackers to force password resets, and perform various cross-site scripting and cross-site request forgery attacks.
    last seen2020-06-01
    modified2020-06-02
    plugin id100561
    published2017-06-01
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100561
    titleDebian DSA-3870-1 : wordpress - security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-3870. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(100561);
  script_version("3.11");
  script_cvs_date("Date: 2018/11/10 11:49:38");

  script_cve_id("CVE-2017-8295", "CVE-2017-9061", "CVE-2017-9062", "CVE-2017-9063", "CVE-2017-9064", "CVE-2017-9065");
  script_xref(name:"DSA", value:"3870");

  script_name(english:"Debian DSA-3870-1 : wordpress - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Several vulnerabilities were discovered in wordpress, a web blogging
tool. They would allow remote attackers to force password resets, and
perform various cross-site scripting and cross-site request forgery
attacks."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=862053"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=862816"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/wordpress"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2017/dsa-3870"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the wordpress packages.

For the stable distribution (jessie), these problems have been fixed
in version 4.1+dfsg-1+deb8u14.

For the upcoming stable (stretch) and unstable (sid) distributions,
these problems have been fixed in version 4.7.5+dfsg-1."
  );
  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:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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:debian:debian_linux:wordpress");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/06/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/01");
  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:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"wordpress", reference:"4.1+dfsg-1+deb8u14")) flag++;
if (deb_check(release:"8.0", prefix:"wordpress-l10n", reference:"4.1+dfsg-1+deb8u14")) flag++;
if (deb_check(release:"8.0", prefix:"wordpress-theme-twentyfifteen", reference:"4.1+dfsg-1+deb8u14")) flag++;
if (deb_check(release:"8.0", prefix:"wordpress-theme-twentyfourteen", reference:"4.1+dfsg-1+deb8u14")) flag++;
if (deb_check(release:"8.0", prefix:"wordpress-theme-twentythirteen", reference:"4.1+dfsg-1+deb8u14")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyCGI abuses
    NASL idWORDPRESS_4_7_5.NASL
    descriptionAccording to its self-reported version number, the WordPress application running on the remote web server is prior to 4.7.5. It is, therefore, affected by multiple vulnerabilities : - A DOM-based cross-site scripting (XSS) vulnerability exists in the uploadSizeError() function within file wp-includes/js/plupload/handlers.js when handling overly large file uploads due to improper validation of user-supplied input to file names before returning it in error messages. An unauthenticated, remote attacker can exploit this, via a specially crafted request, to execute arbitrary script code in a user
    last seen2020-06-01
    modified2020-06-02
    plugin id100298
    published2017-05-19
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100298
    titleWordPress < 4.7.5 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(100298);
  script_version("1.8");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id(
    "CVE-2017-9061",
    "CVE-2017-9062",
    "CVE-2017-9063",
    "CVE-2017-9064",
    "CVE-2017-9065",
    "CVE-2017-9066"
  );
  script_bugtraq_id(98509);

  script_name(english:"WordPress < 4.7.5 Multiple Vulnerabilities");
  script_summary(english:"Checks the version of WordPress.");

  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:
"According to its self-reported version number, the WordPress
application running on the remote web server is prior to 4.7.5.
It is, therefore, affected by multiple vulnerabilities :

  - A DOM-based cross-site scripting (XSS) vulnerability
    exists in the uploadSizeError() function within file
    wp-includes/js/plupload/handlers.js when handling overly
    large file uploads due to improper validation of
    user-supplied input to file names before returning it in
    error messages. An unauthenticated, remote attacker can
    exploit this, via a specially crafted request, to
    execute arbitrary script code in a user's browser
    session. (CVE-2017-9061)

  - A flaw exists in the set_custom_fields() function within
    file wp-includes/class-wp-xmlrpc-server.php when
    accessing post meta data due to improper validation of
    user-supplied input. An authenticated, remote attacker
    can exploit this to gain unauthorized access to meta
    data. (CVE-2017-9062)

  - A stored cross-site scripting (XSS) vulnerability exists
    within file wp-admin/customize.php script due to
    improper validation of user-supplied input to the blog
    name before returning it to users. An authenticated,
    remote attacker can exploit this, via a specially
    crafted request, to execute arbitrary script code in a
    user's browser session. (CVE-2017-9063)

  - A cross-site request forgery (XSRF) vulnerability exists
    in the request_filesystem_credentials() function within
    file /wp-admin/includes/file.php due to a failure to
    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 disclose the user credentials. (CVE-2017-9064)

  - A flaw exists in the XML-RPC API, specifically within
    file wp-includes/class-wp-xmlrpc-server.php in the
    _insert_post() function, when handling post meta data
    due to a lack of capability checks. An unauthenticated,
    remote attacker can exploit this to manipulate posts
    without having the required capabilities.
    (CVE-2017-9065)

  - A flaw exists in the WP_Http::request() function within
    file wp-includes/class-http.php due to improper
    validation of user-supplied iput. An unauthenticated,
    remote attacker can exploit this to redirect the user to
    a URL of the attacker's choosing. (CVE-2017-9066)

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://wordpress.org/news/2017/05/wordpress-4-7-5/");
  script_set_attribute(attribute:"see_also", value:"https://codex.wordpress.org/Version_4.7.5");
  script_set_attribute(attribute:"solution", value:
"Upgrade to WordPress version 4.7.5 or later.");
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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-2017-9064");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/04/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/05/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/19");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:wordpress:wordpress");
  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("wordpress_detect.nasl");
  script_require_keys("www/PHP", "installed_sw/WordPress", "Settings/ParanoidReport");
  script_require_ports("Services/www", 80, 443);

  exit(0);
}

include("vcf.inc");
include("http.inc");

if (report_paranoia < 2) audit(AUDIT_PARANOID);

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

app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);
vcf::check_granularity(app_info:app_info, sig_segments:2);

constraints = [
  { "min_version":"2.5", "fixed_version":"3.7.21", "fixed_display" : "3.7.21 / 4.7.5" },
  { "min_version":"3.8", "fixed_version":"3.8.21", "fixed_display" : "3.8.21 / 4.7.5" },
  { "min_version":"3.9", "fixed_version":"3.9.19", "fixed_display" : "3.9.19 / 4.7.5" },
  { "min_version":"4.0", "fixed_version":"4.0.18", "fixed_display" : "4.0.18 / 4.7.5" },
  { "min_version":"4.1", "fixed_version":"4.1.18", "fixed_display" : "4.1.18 / 4.7.5" },
  { "min_version":"4.2", "fixed_version":"4.2.15", "fixed_display" : "4.2.15 / 4.7.5" },
  { "min_version":"4.3", "fixed_version":"4.3.11", "fixed_display" : "4.3.11 / 4.7.5" },
  { "min_version":"4.4", "fixed_version":"4.4.10", "fixed_display" : "4.4.10 / 4.7.5" },
  { "min_version":"4.5", "fixed_version":"4.5.9", "fixed_display" : "4.5.9 / 4.7.5" },
  { "min_version":"4.6", "fixed_version":"4.6.6", "fixed_display" : "4.6.6 / 4.7.5" },
  { "min_version":"4.7", "fixed_version":"4.7.5", "fixed_display" : "4.7.5" }
];

vcf::check_version_and_report(
  app_info:app_info,
  constraints:constraints,
  severity:SECURITY_WARNING,
  flags:{xss:TRUE,xsrf:TRUE}
);

References