| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1067177 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| black (PTS) | bullseye | 20.8b1-4 | vulnerable |
| bookworm | 23.1.0-1 | vulnerable |
| sid, trixie | 24.10.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| black | source | (unstable) | 24.4.0-1 | | | 1067177 |
Notes
[bookworm] - black <ignored> (Minor issue)
[bullseye] - black <no-dsa> (Minor issue)
[buster] - black <postponed> (Minor issue; can be fixed in next update)
https://security.snyk.io/vuln/SNYK-PYTHON-BLACK-6256273
https://github.com/psf/black/releases/tag/24.3.0
https://github.com/psf/black/commit/f00093672628d212b8965a8993cee8bedf5fe9b8 (24.3.0)