Vulnerabilities > CVE-2018-20148 - Deserialization of Untrusted Data vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
In WordPress before 4.9.9 and 5.x before 5.0.1, contributors could conduct PHP object injection attacks via crafted metadata in a wp.getMediaItem XMLRPC call. This is caused by mishandling of serialized data at phar:// URLs in the wp_get_attachment_thumb_file function in wp-includes/post.php.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Nessus
NASL family CGI abuses NASL id WORDPRESS_5_0_1.NASL description According to its self-reported version number, the WordPress application running on the remote web server is prior to 4.9.9, or 5.x prior to 5.0.1. It is, therefore, affected by multiple vulnerabilities, including cross-site scripting (XSS) vulnerabilities due to improper validation of user-supplied input before returning it to users. last seen 2020-04-30 modified 2018-12-13 plugin id 119615 published 2018-12-13 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119615 title WordPress < 4.9.9 / 5.x < 5.0.1 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(119615); script_version("1.6"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/27"); script_cve_id( "CVE-2018-20147", "CVE-2018-20148", "CVE-2018-20149", "CVE-2018-20150", "CVE-2018-20151", "CVE-2018-20152", "CVE-2018-20153" ); script_name(english:"WordPress < 4.9.9 / 5.x < 5.0.1 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 4.9.9, or 5.x prior to 5.0.1. It is, therefore, affected by multiple vulnerabilities, including cross-site scripting (XSS) vulnerabilities due to improper validation of user-supplied input before returning it to users."); # https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/ script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b90fd4fc"); script_set_attribute(attribute:"solution", value: "Upgrade to WordPress version 4.9.9 or 5.0.1 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-2018-20148"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/13"); script_set_attribute(attribute:"patch_publication_date", value:"2018/12/13"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/13"); 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) 2018-2020 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); # Per https://wordpress.org/download/release-archive/ # only 5.x is currently supported : # "None of these are safe to use, except the latest in the 5.0 series, which is actively maintained." constraints = [ { "fixed_version":"3.7.28", "fixed_display" : "3.7.28 / 5.0.1" }, { "min_version":"3.8", "fixed_version":"3.8.28", "fixed_display" : "3.8.28 / 5.0.1" }, { "min_version":"3.9", "fixed_version":"3.9.26", "fixed_display" : "3.9.26 / 5.0.1" }, { "min_version":"4.0", "fixed_version":"4.0.25", "fixed_display" : "4.0.25 / 5.0.1" }, { "min_version":"4.1", "fixed_version":"4.1.25", "fixed_display" : "4.1.25 / 5.0.1" }, { "min_version":"4.2", "fixed_version":"4.2.22", "fixed_display" : "4.2.22 / 5.0.1" }, { "min_version":"4.3", "fixed_version":"4.3.18", "fixed_display" : "4.3.18 / 5.0.1" }, { "min_version":"4.4", "fixed_version":"4.4.17", "fixed_display" : "4.4.17 / 5.0.1" }, { "min_version":"4.5", "fixed_version":"4.5.16", "fixed_display" : "4.5.16 / 5.0.1" }, { "min_version":"4.6", "fixed_version":"4.6.13", "fixed_display" : "4.6.13 / 5.0.1" }, { "min_version":"4.7", "fixed_version":"4.7.12", "fixed_display" : "4.7.12 / 5.0.1" }, { "min_version":"4.8", "fixed_version":"4.8.8", "fixed_display" : "4.8.8 / 5.0.1" }, { "min_version":"4.9", "fixed_version":"4.9.9", "fixed_display" : "4.9.9 / 5.0.1" }, { "min_version":"5.0", "fixed_version":"5.0.1", "fixed_display" : "5.0.1" } ]; vcf::check_version_and_report( app_info:app_info, constraints:constraints, severity:SECURITY_HOLE, flags:{xss:TRUE} );
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4401.NASL description Several vulnerabilities were discovered in Wordpress, a web blogging tool. They allowed remote attackers to perform various Cross-Side Scripting (XSS) and PHP injections attacks, delete files, leak potentially sensitive data, create posts of unauthorized types, or cause denial-of-service by application crash. last seen 2020-06-01 modified 2020-06-02 plugin id 122551 published 2019-03-04 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122551 title Debian DSA-4401-1 : 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-4401. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(122551); script_version("1.4"); script_cvs_date("Date: 2019/04/10 16:10:16"); script_cve_id("CVE-2018-20147", "CVE-2018-20148", "CVE-2018-20149", "CVE-2018-20150", "CVE-2018-20151", "CVE-2018-20152", "CVE-2018-20153", "CVE-2019-8942"); script_xref(name:"DSA", value:"4401"); script_name(english:"Debian DSA-4401-1 : 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 PHP injections attacks, delete files, leak potentially sensitive data, create posts of unauthorized types, or cause denial-of-service by application crash." ); script_set_attribute( attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916403" ); 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://www.debian.org/security/2019/dsa-4401" ); script_set_attribute( attribute:"solution", value: "Upgrade the wordpress packages. For the stable distribution (stretch), these problems have been fixed in version 4.7.5+dfsg-2+deb9u5." ); 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:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:F/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:"metasploit_name", value:'WordPress Crop-image Shell Upload'); script_set_attribute(attribute:"exploit_framework_metasploit", 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:9.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/14"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/01"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/04"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019 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:"9.0", prefix:"wordpress", reference:"4.7.5+dfsg-2+deb9u5")) flag++; if (deb_check(release:"9.0", prefix:"wordpress-l10n", reference:"4.7.5+dfsg-2+deb9u5")) flag++; if (deb_check(release:"9.0", prefix:"wordpress-theme-twentyfifteen", reference:"4.7.5+dfsg-2+deb9u5")) flag++; if (deb_check(release:"9.0", prefix:"wordpress-theme-twentyseventeen", reference:"4.7.5+dfsg-2+deb9u5")) flag++; if (deb_check(release:"9.0", prefix:"wordpress-theme-twentysixteen", reference:"4.7.5+dfsg-2+deb9u5")) 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 family Debian Local Security Checks NASL id DEBIAN_DLA-1673.NASL description CVE-2018-20147 Authors could modify metadata to bypass intended restrictions on deleting files. CVE-2018-20148 Contributors could conduct PHP object injection attacks via crafted metadata in a wp.getMediaItem XMLRPC call. This is caused by mishandling of serialized data at phar:// URLs in the wp_get_attachment_thumb_file function in wp-includes/post.php. CVE-2018-20149 When the Apache HTTP Server is used, authors could upload crafted files that bypass intended MIME type restrictions, leading to XSS, as demonstrated by a .jpg file without JPEG data. CVE-2018-20150 Crafted URLs could trigger XSS for certain use cases involving plugins. CVE-2018-20151 The user-activation page could be read by a search engine last seen 2020-06-01 modified 2020-06-02 plugin id 122100 published 2019-02-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122100 title Debian DLA-1673-1 : wordpress security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-1673-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(122100); script_version("1.2"); script_cvs_date("Date: 2020/02/13"); script_cve_id("CVE-2018-20147", "CVE-2018-20148", "CVE-2018-20149", "CVE-2018-20150", "CVE-2018-20151", "CVE-2018-20152", "CVE-2018-20153"); script_name(english:"Debian DLA-1673-1 : 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: "CVE-2018-20147 Authors could modify metadata to bypass intended restrictions on deleting files. CVE-2018-20148 Contributors could conduct PHP object injection attacks via crafted metadata in a wp.getMediaItem XMLRPC call. This is caused by mishandling of serialized data at phar:// URLs in the wp_get_attachment_thumb_file function in wp-includes/post.php. CVE-2018-20149 When the Apache HTTP Server is used, authors could upload crafted files that bypass intended MIME type restrictions, leading to XSS, as demonstrated by a .jpg file without JPEG data. CVE-2018-20150 Crafted URLs could trigger XSS for certain use cases involving plugins. CVE-2018-20151 The user-activation page could be read by a search engine's web crawler if an unusual configuration were chosen. The search engine could then index and display a user's e-mail address and (rarely) the password that was generated by default. CVE-2018-20152 Authors could bypass intended restrictions on post types via crafted input. CVE-2018-20153 Contributors could modify new comments made by users with greater privileges, possibly causing XSS. For Debian 8 'Jessie', these problems have been fixed in version 4.1.25+dfsg-1+deb8u1. 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." ); script_set_attribute( attribute:"see_also", value:"https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/jessie/wordpress" ); script_set_attribute(attribute:"solution", value:"Upgrade the affected packages."); 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:"exploitability_ease", value:"No known exploits are available"); 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:"p-cpe:/a:debian:debian_linux:wordpress-theme-twentyfifteen"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:wordpress-theme-twentyfourteen"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:wordpress-theme-twentythirteen"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/14"); script_set_attribute(attribute:"patch_publication_date", value:"2019/02/11"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/12"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 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:"8.0", prefix:"wordpress", reference:"4.1.25+dfsg-1+deb8u1")) flag++; if (deb_check(release:"8.0", prefix:"wordpress-l10n", reference:"4.1.25+dfsg-1+deb8u1")) flag++; if (deb_check(release:"8.0", prefix:"wordpress-theme-twentyfifteen", reference:"4.1.25+dfsg-1+deb8u1")) flag++; if (deb_check(release:"8.0", prefix:"wordpress-theme-twentyfourteen", reference:"4.1.25+dfsg-1+deb8u1")) flag++; if (deb_check(release:"8.0", prefix:"wordpress-theme-twentythirteen", reference:"4.1.25+dfsg-1+deb8u1")) 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
- http://www.securityfocus.com/bid/106220
- http://www.securityfocus.com/bid/106220
- https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-are
- https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-are
- https://codex.wordpress.org/Version_4.9.9
- https://codex.wordpress.org/Version_4.9.9
- https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html
- https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html
- https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/
- https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/
- https://wordpress.org/support/wordpress-version/version-5-0-1/
- https://wordpress.org/support/wordpress-version/version-5-0-1/
- https://wpvulndb.com/vulnerabilities/9171
- https://wpvulndb.com/vulnerabilities/9171
- https://www.debian.org/security/2019/dsa-4401
- https://www.debian.org/security/2019/dsa-4401
- https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/
- https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/
- https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/
- https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/