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.

Classification

CVE ID: CVE-2023-22796

CVSS Base Severity: LOW

CVSS Base Score: 0.0

Affected Products

Vendor: n/a

Product: https://github.com/rails/rails

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.16% (probability of being exploited)

EPSS Percentile: 53.3% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://discuss.rubyonrails.org/t/cve-2023-22796-possible-redos-based-dos-vulnerability-in-active-supports-underscore/82116
https://www.debian.org/security/2023/dsa-5372
https://security.netapp.com/advisory/ntap-20240202-0009/

Timeline