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CVE-2023-22796

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Date: February 8, 2023

A regular expression based DoS vulnerability in Active Support <6.1.7.1 and <7.0.4.1. A specially crafted string passed to the underscore method 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.

Language: Ruby

Severity Score

Related Resources (12)

https://github.com/rails/rails/commit/2164d4f6a1bde74b911fe9ba3c8df1b5bf345bf8
https://security.netapp.com/advisory/ntap-20240202-0009/
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2023-22796.yml
https://www.debian.org/security/2023/dsa-5372
https://github.com/rails/rails
https://nvd.nist.gov/vuln/detail/CVE-2023-22796
https://rubyonrails.org/2023/1/17/Rails-Versions-6-0-6-1-6-1-7-1-7-0-4-1-have-been-released
https://github.com/rails/rails/releases/tag/v7.0.4.1
https://discuss.rubyonrails.org/t/cve-2023-22796-possible-redos-based-dos-vulnerability-in-active-supports-underscore/82116
https://github.com/rails/rails/releases/tag/v6.1.7.1
https://github.com/rails/rails/commit/a7cda7e6aa5334ab41b1f4b0f671be931be946ef
https://www.mend.io/vulnerability-database/CVE-2023-22796

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Inefficient Regular Expression Complexity

CWE-1333

Top Fix

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Upgrade to version activesupport - 6.1.7.1,7.0.4.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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