CVE-2022-23517
Inefficient Regular Expression Complexity in rails-html-sanitizer
Impact
## Summary 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. ## Mitigation Upgrade to rails-html-sanitizer `>= 1.4.4`. ## Severity The maintainers have evaluated this as [High Severity 7.5 (CVSS3.1)](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). ## References - [CWE - CWE-1333: Inefficient Regular Expression Complexity (4.9)](https://cwe.mitre.org/data/definitions/1333.html) - https://hackerone.com/reports/1684163 ## Credit This vulnerability was responsibly reported by @ooooooo-q (https://github.com/ooooooo-q).
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | rails-html-sanitizer | < 1.4.4 | 1.4.4 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Rubyonrails | Rails Html Sanitizers | before 1.4.4 |
| Debian | Debian Linux | Version 10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- 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
- https://github.com/advisories/GHSA-5x79-w82f-gw8w
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rails-html-sanitizer/CVE-2022-23517.yml
- https://nvd.nist.gov/vuln/detail/CVE-2022-23517