high
7.5
CWE
400
Advisory Published
Advisory Published
Updated

CVE-2021-22904

First published: Wed May 05 2021(Updated: )

There is a possible DoS vulnerability in the Token Authentication logic in Action Controller. Versions Affected: >= 4.0.0 Not affected: < 4.0.0 Fixed Versions: 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6 Impact ------ Impacted code uses `authenticate_or_request_with_http_token` or `authenticate_with_http_token` for request authentication. Impacted code will look something like this: ``` class PostsController < ApplicationController before_action :authenticate private def authenticate authenticate_or_request_with_http_token do |token, options| # ... end end end ``` All users running an affected release should either upgrade or use one of the workarounds immediately. Releases -------- The fixed releases are available at the normal locations. Workarounds ----------- The following monkey patch placed in an initializer can be used to work around the issue: ```ruby module ActionController::HttpAuthentication::Token AUTHN_PAIR_DELIMITERS = /(?:,|;|\t)/ end ``` Patches ------- To aid users who aren't able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset. * 5-2-http-authentication-dos.patch - Patch for 5.2 series * 6-0-http-authentication-dos.patch - Patch for 6.0 series * 6-1-http-authentication-dos.patch - Patch for 6.1 series Please note that only the 6.1.Z, 6.0.Z, and 5.2.Z series are supported at present. Users of earlier unsupported releases are advised to upgrade as soon as possible as we cannot guarantee the continued availability of security fixes for unsupported releases. Credits ------- Thank you to https://hackerone.com/wonda_tea_coffee for reporting this issue!

Credit: support@hackerone.com support@hackerone.com

Affected SoftwareAffected VersionHow to fix
redhat/tfm-rubygem-rails<0:6.0.3.7-1.el7
0:6.0.3.7-1.el7
rubygems/actionpack>=4.0.0<=5.2.4.5
5.2.4.6
rubygems/actionpack>=5.2.5<5.2.6
5.2.6
rubygems/actionpack>=6.1.0<=6.1.3.1
6.1.3.2
rubygems/actionpack>=6.0.0<=6.0.3.6
6.0.3.7
Rubyonrails Rails<5.2.4.6
Rubyonrails Rails>=5.2.5<5.2.6
Rubyonrails Rails>=6.0.0<6.0.3.7
Rubyonrails Rails>=6.1.0<6.1.3.2
debian/rails
2:5.2.2.1+dfsg-1+deb10u3
2:5.2.2.1+dfsg-1+deb10u5
2:6.0.3.7+dfsg-2+deb11u2
2:6.1.7.3+dfsg-1
2:6.1.7.3+dfsg-2

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Parent vulnerabilities

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Frequently Asked Questions

  • What is the vulnerability ID of this flaw?

    The vulnerability ID of this flaw is CVE-2021-22904.

  • What is the severity of CVE-2021-22904?

    The severity of CVE-2021-22904 is high (7.5).

  • Which versions of Actionpack are affected by CVE-2021-22904?

    Versions >= 4.0.0 of Actionpack are affected by CVE-2021-22904.

  • How can I fix CVE-2021-22904?

    You can fix CVE-2021-22904 by updating to one of the fixed versions: 6.1.3.2, 6.0.3.7, 5.2.4.6, or 5.2.6.

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