NVD Vulnerability Detail

CVE-2020-28037

Summary	is_blog_installed in wp-includes/functions.php in WordPress before 5.5.2 improperly determines whether WordPress is already installed, which might allow an attacker to perform a new installation, leading to remote code execution (as well as a denial of service for the old installation).
Publication Date	Nov. 3, 2020, 6:15 a.m.
Registration Date	Jan. 26, 2021, 11:56 a.m.
Last Update	Nov. 21, 2024, 2:22 p.m.

CVSS3.1 : CRITICAL
スコア	9.8
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
攻撃に必要な特権レベル(PR)	不要
利用者の関与(UI)	不要
影響の想定範囲(S)	変更なし
機密性への影響(C)	高
完全性への影響(I)	高
可用性への影響(A)	高

CVSS2.0 : HIGH
Score	7.5
Vector	AV:N/AC:L/Au:N/C:P/I:P/A:P
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
攻撃前の認証要否(Au)	不要
機密性への影響(C)	低
完全性への影響(I)	低
可用性への影響(A)	低
Get all privileges.	いいえ
Get user privileges	いいえ
Get other privileges	いいえ
User operation required	いいえ

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:a:wordpress:wordpress::::::::					5.5.2

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:fedoraproject:fedora:31:::::::*
cpe:2.3:o:fedoraproject:fedora:32:::::::*
cpe:2.3:o:fedoraproject:fedora:33:::::::*

Configuration3		or higher	or less	more than	less than
cpe:2.3:o:debian:debian_linux:10.0:::::::*

Related information, measures and tools

No	URL	タグ
1	https://github.com/WordPress/wordpress-develop/commit/2ca15d1e5ce70493c5c0c096ca0c76503d6da07c	Patch Third Party Advisory
2	https://github.com/WordPress/wordpress-develop/commit/2ca15d1e5ce70493c5c0c096ca0c76503d6da07c	Patch Third Party Advisory
3	https://lists.debian.org/debian-lts-announce/2020/11/msg00004.html	Mailing List Third Party Advisory
4	https://lists.debian.org/debian-lts-announce/2020/11/msg00004.html	Mailing List Third Party Advisory
5	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/
6	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/
7	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/
8	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/
9	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/
10	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/
11	https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/	Release Notes Vendor Advisory
12	https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/	Release Notes Vendor Advisory
13	https://wpscan.com/vulnerability/10450	Third Party Advisory
14	https://wpscan.com/vulnerability/10450	Third Party Advisory
15	https://www.debian.org/security/2020/dsa-4784	Third Party Advisory
16	https://www.debian.org/security/2020/dsa-4784	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-754	例外的な状態における不適切なチェック	https://cwe.mitre.org/data/definitions/754.html

JVN Vulnerability Information

WordPress の wp-includes/functions.php の is_blog_installed における新しいインストールを実行される脆弱性

Title	WordPress の wp-includes/functions.php の is_blog_installed における新しいインストールを実行される脆弱性
Summary	WordPress の wp-includes/functions.php の is_blog_installed には、すでにインストールされているかどうかを適切に判断しないため、新しいインストールを実行され、リモートでコードを実行される脆弱性が存在します。
Possible impacts	攻撃者により、新しいインストールを実行され、リモートでコードを実行される可能性があります。
Solution	ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date	Oct. 29, 2020, midnight
Registration Date	May 28, 2021, 4:17 p.m.
Last Update	May 28, 2021, 4:17 p.m.

Affected System

WordPress.org

WordPress 5.5.2 未満

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2020-28037	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28037
National Vulnerability Database (NVD)
2	CVE-2020-28037	https://nvd.nist.gov/vuln/detail/CVE-2020-28037

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-20	https://jvndb.jvn.jp/ja/cwe/CWE-20.html

ベンダー情報

No	Name	URL
GitHub
1	Upgrade/install: Improve logic check when determining installation status.	https://github.com/WordPress/wordpress-develop/commit/2ca15d1e5ce70493c5c0c096ca0c76503d6da07c
WordPress.org
2	WordPress 5.5.2 Security and Maintenance Release	https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/

Change Log

No	Changed Details	Date of change
1	[2021年05月28日] 掲載	May 28, 2021, 4:17 p.m.