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Advisory details: ruby_advisory_db / gems/activesupport/CVE-2023-22796
Advisory ID ruby_advisory_db/gems/activesupport/CVE-2023-22796
Aliases CVE-2023-22796
GHSA-j6gc-792m-qgm2
Summary ReDoS based DoS vulnerability in Active Support’s underscore There is a possible regular expression based DoS vulnerability in Active Support. This vulnerability has been assigned the CVE identifier CVE-2023-22796. Versions Affected: All Not affected: None Fixed Versions: 6.1.7.1, 7.0.4.1 # Impact 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. This affects String#underscore, ActiveSupport::Inflector.underscore, String#titleize, and any other methods using these. All users running an affected release should either upgrade or use one of the workarounds immediately. # Workarounds There are no feasible workarounds for this issue. Users on Ruby 3.2.0 or greater may be able to reduce the impact by configuring Regexp.timeout.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
There are no known severity scores.
Reference id Reference type URL
https://github.com/rails/rails/releases/tag/v7.0.4.1
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
There are no known vectors.

Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-02-05T21:51:29Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2023/22xxx/CVE-2023-22796.json

Source Advisory: vulnrichment/CVE-2023-22796

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]