cve/2024/CVE-2024-21503.md

CVE-2024-21503

Description

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.

POC

Reference

• https://security.snyk.io/vuln/SNYK-PYTHON-BLACK-6256273
• https://security.snyk.io/vuln/SNYK-PYTHON-BLACK-6256273

Github

• https://github.com/NaInSec/CVE-LIST
• https://github.com/fkie-cad/nvd-json-data-feeds