CVE-2021-23437
low
CVSS v3
—
CVSS v4 NEW
—
VIR risk
2.5
Description
The package pillow from 0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.
Predictions
Exploit likelihood
30%
Patch ETA
—
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
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 8.3.2-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 8.3.2-1 |
| sid | Fixed | 8.3.2-1 |
| forky | Fixed | 8.3.2-1 |
| bullseye | Fixed | 8.1.2+dfsg-0.3+deb11u3 |
| bookworm | Fixed | 8.3.2-1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-23437
- https://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b
- https://github.com/advisories/GHSA-98vv-pw6r-q6q4
- https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-317.yaml
- https://github.com/python-pillow/Pillow
- https://lists.debian.org/debian-lts-announce/2024/03/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT
- https://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html
- https://security.gentoo.org/glsa/202211-10
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443
- https://www.suse.com/security/cve/CVE-2021-23437.html
- https://security-tracker.debian.org/tracker/CVE-2021-23437
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.