CVE-2021-22904

Public Exploit

Description

The actionpack ruby gem before 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6 suffers from a possible denial of service vulnerability in the Token Authentication logic in Action Controller due to a too permissive regular expression. Impacted code uses `authenticate_or_request_with_http_token` or `authenticate_with_http_token` for request authentication.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 5.41% Top 15%
Vendor Advisory rubyonrails.org
Affected: n/a https://github.com/rails/rails
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/1101125 third party advisory permissions required
https://discuss.rubyonrails.org/t/cve-2021-22904-possible-dos-vulnerability-in-action-controller-token-authentication/77869 patch exploit vendor advisory mitigation
https://security.netapp.com/advisory/ntap-20210805-0009/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-22904?
CVE-2021-22904 has been scored as a high severity vulnerability.
How to fix CVE-2021-22904?
To fix CVE-2021-22904, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22904 being actively exploited in the wild?
It is possible that CVE-2021-22904 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22904?
CVE-2021-22904 affects n/a https://github.com/rails/rails.
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