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Inefficient Regular Expression Complexity

CVE-2022-23517

High
7.5/10

Summary

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Certain configurations of rails-html-sanitizer prior to 1.4.4 use an Inefficient Regular Expression that is susceptible to excessive backtracking when attempting to sanitize certain "SVG" attributes. This may lead to a denial of service through CPU resource consumption.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-1333 - Inefficient Regular Expression Complexity

The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.

References

Advisory Timeline

  • Published