Home/CVE/A regular expression based DoS vulnerability in Action Dispatch <6.0.6.1,< 6.1.7.1, and <7.0.4.1. Specially crafted cook
CVE

CVE-2023-22792

A regular expression based DoS vulnerability in Action Dispatch <6.0.6.1,< 6.1.7.1, and <7.0.4.1. Specially crafted cook

A regular expression based DoS vulnerability in Action Dispatch <6.0.6.1,< 6.1.7.1, and <7.0.4.1. Specially crafted cookies, in combination with a specially crafted X_FORWARDED_HOST header can cause the regular expression engine to enter a state of catastrophic backtracking. 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.

HIGH · CVSS 7.5 EPSS 0.02264
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-1333Inefficient Regular Expression Complexity
CWE-400Uncontrolled Resource Consumption
▤

Affected Products & Versions

3
rubyonrails rails>= 3.0.0 and < 6.0.6.1
rubyonrails rails>= 6.1.0 and < 6.1.7.1
rubyonrails rails>= 7.0.0 and < 7.0.4.1
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
RubyGems actionpack LOW fixed in 5.2.8.15
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumRuby on Rails Framework Exceptions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · support@hackerone.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Feb 2023 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

6
suse-csafopenSUSE-SU-2025:15110-1
suse-csafopenSUSE-SU-2024:14067-1
suse-csafopenSUSE-SU-2024:12765-1
rhsaRHSA-2023:6818Important
suse-csafSUSE-SU-2023:0442-1
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://discuss.rubyonrails.org/t/cve-2023-22792-possible-redos-based-dos-vulnerability-in-action-dispatch/82115PatchVendor Advisory
https://security.netapp.com/advisory/ntap-20240202-0007/
https://www.debian.org/security/2023/dsa-5372
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