CVE-2021-21236
Description
CairoSVG is a Python (pypi) package. CairoSVG is an SVG converter based on Cairo. In CairoSVG before version 2.5.1, there is a regular expression denial of service (REDoS) vulnerability. When processing SVG files, the python package CairoSVG uses two regular expressions which are vulnerable to Regular Expression Denial of Service (REDoS). If an attacker provides a malicious SVG, it can make cairosvg get stuck processing the file for a very long time. This is fixed in version 2.5.1. See Referenced GitHub advisory for more information.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 2.5.1-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2.5.0-1.1 |
| sid | Fixed | 2.5.0-1.1 |
| forky | Fixed | 2.5.0-1.1 |
| bullseye | Fixed | 2.5.0-1.1 |
| bookworm | Fixed | 2.5.0-1.1 |
References
- https://security.archlinux.org/ASA-202101-12
- https://security-tracker.debian.org/tracker/CVE-2021-21236
- https://github.com/Kozea/CairoSVG/security/advisories/GHSA-hq37-853p-g5cf
- https://nvd.nist.gov/vuln/detail/CVE-2021-21236
- https://github.com/Kozea/CairoSVG/commit/cfc9175e590531d90384aa88845052de53d94bf3
- https://github.com/Kozea/CairoSVG
- https://github.com/Kozea/CairoSVG/releases/tag/2.5.1
- https://github.com/pypa/advisory-database/tree/main/vulns/cairosvg/PYSEC-2021-5.yaml
- https://pypi.org/project/CairoSVG
- https://pypi.org/project/CairoSVG/
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.