Ability to forge per-form CSRF tokens given a global CSRF token
It is possible to possible to, given a global CSRF token such as the one
present in the authenticity_token meta tag, forge a per-form CSRF token for
any action for that session.
Versions Affected: rails < 5.2.5, rails < 6.0.4
Not affected: Applications without existing HTML injection vulnerabilities.
Fixed Versions: rails >= 5.2.4.3, rails >= 6.0.3.1
Impact
Given the ability to extract the global CSRF token, an attacker would be able to
construct a per-form CSRF token for that session.
Workarounds
This is a low-severity security issue. As such, no workaround is necessarily
until such time as the application can be upgraded.
In some cases user supplied information can be inadvertently leaked from
Strong Parameters. Specifically the return value of each, or each_value,
or each_pair will return the underlying "untrusted" hash of data that was
read from the parameters. Applications that use this return value may be
inadvertently use untrusted user input.
Impacted code will look something like this:
def update
# Attacker has included the parameter: `{ is_admin: true }`
User.update(clean_up_params)
</tr></table>
Denial of Service in Action Controller Token Authentication
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
Information Disclosure / Unintended Method Execution in Action Pack
Impact
There is a possible information disclosure / unintended method execution
vulnerability in Action Pack when using the redirect_to or polymorphic_url
helper with untrusted user input.
Vulnerable code will look like this.
redirect_to(params[:some_param])
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.
Possible DoS Vulnerability in Action Controller Token Authentication
There is a possible DoS vulnerability in the Token Authentication logic in
Action Controller. This vulnerability has been assigned the CVE identifier
CVE-2021-22904.
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
Possible Information Disclosure / Unintended Method Execution in Action Pack
There is a possible information disclosure / unintended method execution
vulnerability in Action Pack which has been assigned the CVE identifier
CVE-2021-22885.
There is a possible information disclosure / unintended method execution
vulnerability in Action Pack when using the redirect_to or polymorphic_url
helper with untrusted user input.
In some cases user supplied information can be inadvertently leaked from
Strong Parameters. Specifically the return value of each, or each_value,
or each_pair will return the underlying "untrusted" hash of data that was
read from the parameters. Applications that use this return value may be
inadvertently use untrusted user input.
Impacted code will look something like this:
def update
# Attacker has included the parameter: `{ is_admin: true }`
User.update(clean_up_params)
</tr></table>
Ability to forge per-form CSRF tokens given a global CSRF token
It is possible to possible to, given a global CSRF token such as the one
present in the authenticity_token meta tag, forge a per-form CSRF token for
any action for that session.
Versions Affected: rails < 5.2.5, rails < 6.0.4
Not affected: Applications without existing HTML injection vulnerabilities.
Fixed Versions: rails >= 5.2.4.3, rails >= 6.0.3.1
Impact
Given the ability to extract the global CSRF token, an attacker would be able to
construct a per-form CSRF token for that session.
Workarounds
This is a low-severity security issue. As such, no workaround is necessarily
until such time as the application can be upgraded.
Possible Information Disclosure / Unintended Method Execution in Action Pack
There is a possible information disclosure / unintended method execution
vulnerability in Action Pack which has been assigned the CVE identifier
CVE-2021-22885.
There is a possible information disclosure / unintended method execution
vulnerability in Action Pack when using the redirect_to or polymorphic_url
helper with untrusted user input.
Possible DoS Vulnerability in Action Controller Token Authentication
There is a possible DoS vulnerability in the Token Authentication logic in
Action Controller. This vulnerability has been assigned the CVE identifier
CVE-2021-22904.
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
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Bumps actionpack from 4.2.10 to 6.1.4. This update includes security fixes.
Vulnerabilities fixed
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Release notes
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Changelog
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Commits
8321702
Preparing for 6.1.4 releasee71539c
Update CHANGELOG8877b88
Merge pull request #42153 from kevinsjoberg/ignore-file-fixtures-on-load5b4466d
Merge pull request #41609fab5a81
Merge pull request #42437 from HParker/digest-find-parent-controller-template3bbf3ac
Merge pull request #42244 from hahmed/fix-invalid-statement-compile-errord83a318
Merge pull request #42283 from HParker/named-routes-identifies-false255b5ff
Fix compatibility with psych 4.xd18ada7
Make Rubocop happy adding extra spaces4829fae
Merge branch '6-1-sec' into 6-1-stableDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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