5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.002 Low
EPSS
Percentile
60.8%
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.
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
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.
The fixed releases are available at the normal locations.
The following monkey patch placed in an initializer can be used to work around
the issue:
module ActionController::HttpAuthentication::Token
AUTHN_PAIR_DELIMITERS = /(?:,|;|\t)/
end
CPE | Name | Operator | Version |
---|---|---|---|
actionpack | lt | 4.0.0 | |
actionpack | le | 5.2.4.5 | |
actionpack | ge | 5.2.5.0 | |
actionpack | le | 5.2.5 | |
actionpack | ge | 5.3.0 | |
actionpack | le | 6.0.3.6 | |
actionpack | ge | 6.0.4.0 | |
actionpack | lt | 6.1.3.2 |
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.002 Low
EPSS
Percentile
60.8%