CVE-2021-22942

2021-08-2009:28:34

redhat.com

access.redhat.com

rubygem-actionpack

host authorization middleware

malicious website

system availability

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS3

6.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

EPSS

0.001

Percentile

47.3%

JSON

A flaw was found in rubygem-actionpack. Specially crafted “X-Forwarded-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. The highest threat from this vulnerability is to system availability.