Versions of the package black before 24.3.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the lines_with_leading_tabs_expanded function in the strings.py file. An attacker could exploit this vulnerability by crafting a malicious input that causes a denial of service. Exploiting this vulnerability is possible when running Black on untrusted input, or if you habitually put thousands of leading tab characters in your docstrings.
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 |
|---|---|---|---|
| Red Hat Ansible Automation Platform 2.4 for RHEL 8 | RedHat | python3x-black-0:22.8.0-2.el8ap | * |
| Red Hat Ansible Automation Platform 2.4 for RHEL 9 | RedHat | python-black-0:22.8.0-2.el9ap | * |
| Black | Ubuntu | focal | * |
| Black | Ubuntu | mantic | * |
| Black | Ubuntu | oracular | * |
| Black | Ubuntu | plucky | * |
| Black | Ubuntu | questing | * |
Potential Mitigations
Related Attack Patterns
References
- https://github.com/psf/black/commit/f00093672628d212b8965a8993cee8bedf5fe9b8
- https://github.com/psf/black/releases/tag/24.3.0
- https://security.snyk.io/vuln/SNYK-PYTHON-BLACK-6256273
- https://github.com/psf/black/commit/f00093672628d212b8965a8993cee8bedf5fe9b8
- https://github.com/psf/black/releases/tag/24.3.0
- https://security.snyk.io/vuln/SNYK-PYTHON-BLACK-6256273