Fluid Attacks Database

Description

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.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
debian 14	rails	>=0 <2:6.1.7.3+dfsg-1	2:6.1.7.3+dfsg-1
debian 12	rails	>=0 <2:6.1.7.3+dfsg-1	2:6.1.7.3+dfsg-1
debian 13	rails	>=0 <2:6.1.7.3+dfsg-1	2:6.1.7.3+dfsg-1
rubygems	activesupport	>=0 <6.1.7.1 \|\| >=7.0.0 <7.0.4.1	6.1.7.1, 7.0.4.1

Aliases

1. CVE-2023-227962. NVD-2023-227963. OSV-DEBIAN-2023-227964. OSV-2023-227965. GCVE-2023-227966. SECURITY-TRACKER-CVE-2023-22796

References

1. https://github.com/rails/rails/commit/2164d4f6a1bde74b911fe9ba3c8df1b5bf345bf82. https://github.com/rails/rails/commit/a7cda7e6aa5334ab41b1f4b0f671be931be946ef3. https://discuss.rubyonrails.org/t/cve-2023-22796-possible-redos-based-dos-vulnerability-in-active-supports-underscore/821164. https://github.com/rails/rails/releases/tag/v6.1.7.15. https://github.com/rails/rails/releases/tag/v7.0.4.16. https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2023-22796.yml7. https://rubyonrails.org/2023/1/17/Rails-Versions-6-0-6-1-6-1-7-1-7-0-4-1-have-been-released

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