CVE-2023-22796
CVE-2023-22796 is a high-severity vulnerability in Activesupport Project Activesupport with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1333.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 2% (75th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-1333
- Affected product: Activesupport Project Activesupport
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2023-22796?
- 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.
- How severe is CVE-2023-22796?
- CVE-2023-22796 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2023-22796 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-22796?
- CVE-2023-22796 affects Activesupport Project Activesupport. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-22796?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2023-22796 published?
- CVE-2023-22796 was published on 2023-02-09 and last updated on 2026-06-17.
References
- https://discuss.rubyonrails.org/t/cve-2023-22796-possible-redos-based-dos-vulnerability-in-active-supports-underscore/82116
- https://security.netapp.com/advisory/ntap-20240202-0009/
- https://www.debian.org/security/2023/dsa-5372
Affected products (1)
- cpe:2.3:a:activesupport_project:activesupport:*:*:*:*:*:ruby:*:*
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