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Ruby on Rails: URL Redirection to Untrusted Site ('Open Redirect') (CVE-2021-22881)

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Ruby on Rails: URL Redirection to Untrusted Site ('Open Redirect') (CVE-2021-22881)

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Published
02/11/2021
Created
02/20/2021
Added
02/19/2021
Modified
08/23/2021

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 "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.

Solution(s)

  • ruby-on-rails-upgrade-6_0_3_5
  • ruby-on-rails-upgrade-6_1_2_1

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