CVE-2021-22881

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

El middleware de Autorización de Host en Action Pack versiones anteriores a 6.1.2.1, 6.0.3.5 sufre una vulnerabilidad de redireccionamiento abierto. Los encabezados "Host" especialmente diseñados en combinación con determinados formatos "allowed host" pueden causar que el middleware de Autorización del Host en Action Pack redireccione a los usuarios a un sitio web malicioso. Las aplicaciones afectadas habrán permitido hosts con un punto inicial. Cuando un host permitido contiene un punto inicial, un encabezado "Host" especialmente diseñado puede ser usado para redireccionar hacia un sitio web malicioso

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-06 CVE Reserved
2021-02-11 CVE Published
2024-08-03 CVE Updated
2024-08-03 First Exploit
2024-10-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

CAPEC

References (7)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2021/05/05/2	Mailing List
http://www.openwall.com/lists/oss-security/2021/08/20/1	Mailing List

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2021/12/14/5	2024-08-03
https://hackerone.com/reports/1047447	2024-08-03

URL	Date	SRC
https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization	2023-11-07
https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Rubyonrails Search vendor "Rubyonrails"		Rails Search vendor "Rubyonrails" for product "Rails"				>= 6.0.0 < 6.0.3.5 Search vendor "Rubyonrails" for product "Rails" and version " >= 6.0.0 < 6.0.3.5"		-		Affected
Rubyonrails Search vendor "Rubyonrails"		Rails Search vendor "Rubyonrails" for product "Rails"				>= 6.1.0 < 6.1.2.1 Search vendor "Rubyonrails" for product "Rails" and version " >= 6.1.0 < 6.1.2.1"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected