CVE-2021-22881 Information

Description

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 llowed 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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Reference

https://hackerone.com/reports/1047447 https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130 https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/ http://www.openwall.com/lists/oss-security/2021/05/05/2 http://www.openwall.com/lists/oss-security/2021/08/20/1 http://www.openwall.com/lists/oss-security/2021/12/14/5

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

6.1