rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Certain configurations of rails-html-sanitizer < 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. This issue has been patched in version 1.4.4.
Weakness
The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Rails_html_sanitizers | Rubyonrails | * | 1.4.4 (excluding) |
| Red Hat Satellite 6.13 for RHEL 8 | RedHat | satellite:el8/rubygem-rails-html-sanitizer-0:1.4.4-1.el8sat | * |
| Ruby-rails-html-sanitizer | Ubuntu | bionic | * |
| Ruby-rails-html-sanitizer | Ubuntu | esm-apps/xenial | * |
| Ruby-rails-html-sanitizer | Ubuntu | focal | * |
| Ruby-rails-html-sanitizer | Ubuntu | kinetic | * |
| Ruby-rails-html-sanitizer | Ubuntu | lunar | * |
| Ruby-rails-html-sanitizer | Ubuntu | mantic | * |
| Ruby-rails-html-sanitizer | Ubuntu | oracular | * |
| Ruby-rails-html-sanitizer | Ubuntu | plucky | * |
| Ruby-rails-html-sanitizer | Ubuntu | trusty | * |
| Ruby-rails-html-sanitizer | Ubuntu | xenial | * |
Potential Mitigations
Related Attack Patterns
References
- https://github.com/rails/rails-html-sanitizer/commit/56c61c0cebd1e493e8ad7bca2a0191609a4a6979
- https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-5x79-w82f-gw8w
- https://hackerone.com/reports/1684163
- https://lists.debian.org/debian-lts-announce/2023/09/msg00012.html
- https://github.com/rails/rails-html-sanitizer/commit/56c61c0cebd1e493e8ad7bca2a0191609a4a6979
- https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-5x79-w82f-gw8w
- https://hackerone.com/reports/1684163
- https://lists.debian.org/debian-lts-announce/2023/09/msg00012.html
- https://lists.debian.org/debian-lts-announce/2024/09/msg00045.html