CVE-2021-23437
HIGH7.5EPSS 0.23%Regular Expression Denial of Service (ReDoS)
Published: 9/7/2021Modified: 4/28/2026
Description
The package pillow 5.2.0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.
Affected packages (8)
- Alpine/py3-pillowfrom 0, < 7.1.2-r2
- Alpine/py-pillowfrom 0, < 6.2.1-r1
- Bitnami/pillow>= 5.2.0, < 8.3.2
- Debian/pillowfrom 0, < 8.1.2+dfsg-0.3+deb11u3
- Debian/pillowfrom 0, < 8.1.2+dfsg-0.3+deb11u3
- Debian/pillowfrom 0, < 5.4.1-2+deb10u5
- PyPI/pillow>= 5.2.0, < 8.3.2
- PyPI/pillowfrom 0, < 9e08eb8f78fdfd2f476e1b20b7cf38683754866b | from 0, < 8.3.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (17)
- ADVISORYhttps://github.com/advisories/GHSA-98vv-pw6r-q6q4
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-23437
- ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2021-23437
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-23437
- PATCHhttps://github.com/python-pillow/Pillow
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-317.yaml
- WEBhttps://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b
- WEBhttps://lists.debian.org/debian-lts-announce/2024/03/msg00021.html
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C/
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT/
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT
- WEBhttps://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html
- WEBhttps://security.gentoo.org/glsa/202211-10
- WEBhttps://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443