CVE-2020-11028 - Information Exposure vulnerability in Wordpress

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE

Summary

In affected versions of WordPress, some private posts, which were previously public, can result in unauthenticated disclosure under a specific set of conditions. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).

Vulnerable Configurations

Common Weakness Enumeration (CWE)

CWE-200 - Information Exposure

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

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_DLA-2208.NASL
    descriptionMultiple CVE(s) were discovered in the src:wordpress package. CVE-2020-11026 Files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. CVE-2020-11027 A password reset link emailed to a user does not expire upon changing the user password. Access would be needed to the email account of the user by a malicious party for successful execution. CVE-2020-11028 Some private posts, which were previously public, can result in unauthenticated disclosure under a specific set of conditions. CVE-2020-11029 A vulnerability in the stats() method of class-wp-object-cache.php can be exploited to execute cross-site scripting (XSS) attacks. For Debian 8
    last seen2020-05-15
    modified2020-05-12
    plugin id136484
    published2020-05-12
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136484
    titleDebian DLA-2208-1 : 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-2208-1. The text
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(136484);
      script_version("1.4");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/19");
    
      script_cve_id("CVE-2020-11026", "CVE-2020-11027", "CVE-2020-11028", "CVE-2020-11029");
      script_xref(name:"IAVA", value:"2020-A-0191-S");
    
      script_name(english:"Debian DLA-2208-1 : 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:
    "Multiple CVE(s) were discovered in the src:wordpress package.
    
    CVE-2020-11026
    
    Files with a specially crafted name when uploaded to the Media section
    can lead to script execution upon accessing the file. This requires an
    authenticated user with privileges to upload files.
    
    CVE-2020-11027
    
    A password reset link emailed to a user does not expire upon changing
    the user password. Access would be needed to the email account of the
    user by a malicious party for successful execution.
    
    CVE-2020-11028
    
    Some private posts, which were previously public, can result in
    unauthenticated disclosure under a specific set of conditions.
    
    CVE-2020-11029
    
    A vulnerability in the stats() method of class-wp-object-cache.php can
    be exploited to execute cross-site scripting (XSS) attacks.
    
    For Debian 8 'Jessie', these problems have been fixed in version
    4.1.30+dfsg-0+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/2020/05/msg00011.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:S/C:P/I:P/A:N");
      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:L/UI:N/S:U/C:H/I:H/A:N");
      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:"2020/04/30");
      script_set_attribute(attribute:"patch_publication_date", value:"2020/05/11");
      script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/12");
      script_set_attribute(attribute:"stig_severity", value:"II");
      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:"8.0", prefix:"wordpress", reference:"4.1.30+dfsg-0+deb8u1")) flag++;
    if (deb_check(release:"8.0", prefix:"wordpress-l10n", reference:"4.1.30+dfsg-0+deb8u1")) flag++;
    if (deb_check(release:"8.0", prefix:"wordpress-theme-twentyfifteen", reference:"4.1.30+dfsg-0+deb8u1")) flag++;
    if (deb_check(release:"8.0", prefix:"wordpress-theme-twentyfourteen", reference:"4.1.30+dfsg-0+deb8u1")) flag++;
    if (deb_check(release:"8.0", prefix:"wordpress-theme-twentythirteen", reference:"4.1.30+dfsg-0+deb8u1")) 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");