CVE-2023-22795

Description

A regular expression based DoS vulnerability in Action Dispatch <6.1.7.1 and <7.0.4.1 related to the If-None-Match header. A specially crafted HTTP If-None-Match header can cause the regular expression engine to enter a state of catastrophic backtracking, when on a version of Ruby below 3.2.0. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability All users running an affected release should either upgrade or use one of the workarounds immediately.

Categories

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.76% Top 30%
Vendor Advisory debian.org Vendor Advisory rubyonrails.org
Affected: n/a https://github.com/rails/rails
Published at:
Updated at:

References

Link Tags
https://discuss.rubyonrails.org/t/cve-2023-22795-possible-redos-based-dos-vulnerability-in-action-dispatch/82118 patch vendor advisory
https://www.debian.org/security/2023/dsa-5372 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20240202-0010/

Frequently Asked Questions

What is the severity of CVE-2023-22795?
CVE-2023-22795 has been scored as a high severity vulnerability.
How to fix CVE-2023-22795?
To fix CVE-2023-22795, 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-2023-22795 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-22795 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-22795?
CVE-2023-22795 affects n/a https://github.com/rails/rails.
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