Vulnerabilities > CVE-2019-20043 - Improper Privilege Management vulnerability in multiple products

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
NONE
Integrity impact
LOW
Availability impact
NONE
network
low complexity
wordpress
debian
CWE-269
nessus
NVD
Published: 2019-12-27
Updated: 2023-01-20

Summary

In in wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php in WordPress 3.7 to 5.3.0, authenticated users who do not have the rights to publish a post are able to mark posts as sticky or unsticky via the REST API. For example, the contributor role does not have such rights, but this allowed them to bypass that. This has been patched in WordPress 5.3.1, along with all the previous WordPress versions from 3.7 to 5.3 via a minor release.

Vulnerable Configurations

Part Description Count
Application
Wordpress
594
OS
Debian
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • 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.

Nessus

  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4677.NASL
    descriptionSeveral vulnerabilities were discovered in Wordpress, a web blogging tool. They allowed remote attackers to perform various Cross-Side Scripting (XSS) and Cross-Site Request Forgery (CSRF) attacks, create files on the server, disclose private information, create open redirects, poison cache, and bypass authorization access and input sanitation.
    last seen2020-05-12
    modified2020-05-07
    plugin id136373
    published2020-05-07
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136373
    titleDebian DSA-4677-1 : 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-4677. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(136373);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/19");

  script_cve_id("CVE-2019-16217", "CVE-2019-16218", "CVE-2019-16219", "CVE-2019-16220", "CVE-2019-16221", "CVE-2019-16222", "CVE-2019-16223", "CVE-2019-16780", "CVE-2019-16781", "CVE-2019-17669", "CVE-2019-17671", "CVE-2019-17672", "CVE-2019-17673", "CVE-2019-17674", "CVE-2019-17675", "CVE-2019-20041", "CVE-2019-20042", "CVE-2019-20043", "CVE-2019-9787", "CVE-2020-11025", "CVE-2020-11026", "CVE-2020-11027", "CVE-2020-11028", "CVE-2020-11029", "CVE-2020-11030");
  script_xref(name:"DSA", value:"4677");
  script_xref(name:"IAVA", value:"2020-A-0191-S");

  script_name(english:"Debian DSA-4677-1 : 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 allowed remote attackers to perform various Cross-Side
Scripting (XSS) and Cross-Site Request Forgery (CSRF) attacks, create
files on the server, disclose private information, create open
redirects, poison cache, and bypass authorization access and input
sanitation."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=924546"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=939543"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942459"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=946905"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=959391"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/wordpress"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/wordpress"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/buster/wordpress"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2020/dsa-4677"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the wordpress packages.

For the oldstable distribution (stretch), these problems have been
fixed in version 4.7.5+dfsg-2+deb9u6.

For the stable distribution (buster), these problems have been fixed
in version 5.0.4+dfsg1-1+deb10u2."
  );
  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:debian:debian_linux:wordpress");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/07");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 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:"10.0", prefix:"wordpress", reference:"5.0.4+dfsg1-1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"wordpress-l10n", reference:"5.0.4+dfsg1-1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"wordpress-theme-twentynineteen", reference:"5.0.4+dfsg1-1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"wordpress-theme-twentyseventeen", reference:"5.0.4+dfsg1-1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"wordpress-theme-twentysixteen", reference:"5.0.4+dfsg1-1+deb10u2")) flag++;
if (deb_check(release:"9.0", prefix:"wordpress", reference:"4.7.5+dfsg-2+deb9u6")) flag++;
if (deb_check(release:"9.0", prefix:"wordpress-l10n", reference:"4.7.5+dfsg-2+deb9u6")) flag++;
if (deb_check(release:"9.0", prefix:"wordpress-theme-twentyfifteen", reference:"4.7.5+dfsg-2+deb9u6")) flag++;
if (deb_check(release:"9.0", prefix:"wordpress-theme-twentyseventeen", reference:"4.7.5+dfsg-2+deb9u6")) flag++;
if (deb_check(release:"9.0", prefix:"wordpress-theme-twentysixteen", reference:"4.7.5+dfsg-2+deb9u6")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4599.NASL
    descriptionSeveral vulnerabilities were discovered in Wordpress, a web blogging tool. They allowed remote attackers to perform various Cross-Side Scripting (XSS) and Cross-Site Request Forgery (CSRF) attacks, create open redirects, poison cache, and bypass authorization access and input sanitation.
    last seen2020-06-01
    modified2020-06-02
    plugin id132736
    published2020-01-09
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/132736
    titleDebian DSA-4599-1 : 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-4599. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(132736);
  script_version("1.2");
  script_cvs_date("Date: 2020/01/13");

  script_cve_id("CVE-2019-16217", "CVE-2019-16218", "CVE-2019-16219", "CVE-2019-16220", "CVE-2019-16221", "CVE-2019-16222", "CVE-2019-16223", "CVE-2019-16780", "CVE-2019-16781", "CVE-2019-17669", "CVE-2019-17671", "CVE-2019-17672", "CVE-2019-17673", "CVE-2019-17674", "CVE-2019-17675", "CVE-2019-20041", "CVE-2019-20042", "CVE-2019-20043");
  script_xref(name:"DSA", value:"4599");

  script_name(english:"Debian DSA-4599-1 : 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 allowed remote attackers to perform various Cross-Side
Scripting (XSS) and Cross-Site Request Forgery (CSRF) attacks, create
open redirects, poison cache, and bypass authorization access and
input sanitation."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=939543"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942459"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=946905"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/wordpress"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/buster/wordpress"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2020/dsa-4599"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the wordpress packages.

For the stable distribution (buster), these problems have been fixed
in version 5.0.4+dfsg1-1+deb10u1."
  );
  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:debian:debian_linux:wordpress");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/01/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/09");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 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:"10.0", prefix:"wordpress", reference:"5.0.4+dfsg1-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"wordpress-l10n", reference:"5.0.4+dfsg1-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"wordpress-theme-twentynineteen", reference:"5.0.4+dfsg1-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"wordpress-theme-twentyseventeen", reference:"5.0.4+dfsg1-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"wordpress-theme-twentysixteen", reference:"5.0.4+dfsg1-1+deb10u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References