NVD Vulnerability Detail

CVE-2021-22881

Summary	The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted `Host` headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted `Host` header can be used to redirect to a malicious website.
Publication Date	Feb. 12, 2021, 3:15 a.m.
Registration Date	Feb. 12, 2021, 10:02 a.m.
Last Update	Nov. 21, 2024, 2:50 p.m.

CVSS3.1 : MEDIUM
スコア	6.1
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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)	要
影響の想定範囲(S)	変更あり
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)	なし

CVSS2.0 : MEDIUM
Score	5.8
Vector	AV:N/AC:M/Au:N/C:P/I:P/A:N
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	中
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)	なし
Get all privileges.	いいえ
Get user privileges	いいえ
Get other privileges	いいえ
User operation required	はい

Affected software configurations

Configuration1	or higher	or less	more than	less than
cpe:2.3:a:rubyonrails:rails::::::::	6.1.0			6.1.2.1
cpe:2.3:a:rubyonrails:rails::::::::	6.0.0			6.0.3.5

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

Related information, measures and tools

No	URL	タグ
1	http://www.openwall.com/lists/oss-security/2021/05/05/2	Mailing List Mitigation Third Party Advisory
2	http://www.openwall.com/lists/oss-security/2021/05/05/2	Mailing List Mitigation Third Party Advisory
3	http://www.openwall.com/lists/oss-security/2021/08/20/1	Mailing List Mitigation Third Party Advisory
4	http://www.openwall.com/lists/oss-security/2021/08/20/1	Mailing List Mitigation Third Party Advisory
5	http://www.openwall.com/lists/oss-security/2021/12/14/5	Exploit Mailing List Patch
6	http://www.openwall.com/lists/oss-security/2021/12/14/5	Exploit Mailing List Patch
7	https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/	Patch Third Party Advisory
8	https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/	Patch Third Party Advisory
9	https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130	Mitigation Patch Vendor Advisory
10	https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130	Mitigation Patch Vendor Advisory
11	https://hackerone.com/reports/1047447	Exploit Patch Third Party Advisory
12	https://hackerone.com/reports/1047447	Exploit Patch Third Party Advisory
13	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/
14	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-601	オープンリダイレクト	https://cwe.mitre.org/data/definitions/601.html

JVN Vulnerability Information

Action Pack におけるオープンリダイレクトの脆弱性

Title	Action Pack におけるオープンリダイレクトの脆弱性
Summary	Action Pack には、オープンリダイレクトの脆弱性が存在します。
Possible impacts	情報を取得される、および情報を改ざん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	Feb. 10, 2021, midnight
Registration Date	Nov. 4, 2021, 3:05 p.m.
Last Update	Nov. 4, 2021, 3:05 p.m.

Affected System

Fedora Project

Fedora

Ruby on Rails project

Rails 6.0.3.5 未満

Rails 6.1.2.1 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-2021-22881	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22881
National Vulnerability Database (NVD)
2	CVE-2021-22881	https://nvd.nist.gov/vuln/detail/CVE-2021-22881

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-601	https://cwe.mitre.org/data/definitions/601.html

ベンダー情報

No	Name	URL
Benjamin Bouchet
1	[CVE-2021-22881] Faille de securite dans le middleware HostAuthorization	https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/
Fedora Update Notification
2	FEDORA-2021-b571fca1b8	https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/
Rails weblog
3	[CVE-2021-22881] Possible Open Redirect in Host Authorization Middleware	https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130

その他

No	Name	URL
関連文書
1	HostAuthorization middleware does not stuitably sanitize the Host / X-Forwarded-For header allowing redirection.	https://hackerone.com/reports/1047447
2	[CVE-2021-22903] Possible Open Redirect Vulnerability in Action Pack	http://www.openwall.com/lists/oss-security/2021/05/05/2
3	[CVE-2021-22942] Possible Open Redirect in Host Authorization Middleware	http://www.openwall.com/lists/oss-security/2021/08/20/1

Change Log

No	Changed Details	Date of change
1	[2021年11月04日] 掲載	Nov. 4, 2021, 3:05 p.m.