CVE-2021-28678
MEDIUM5.5EPSS 0.11%Insufficient Verification of Data Authenticity in Pillow
Published: 6/8/2021Modified: 4/28/2026
Description
An issue was discovered in Pillow before 8.2.0. For BLP data, BlpImagePlugin did not properly check that reads (after jumping to file offsets) returned data. This could lead to a DoS where the decoder could be run a large number of times on empty data.
Affected packages (5)
- Alpine/py3-pillowfrom 0, < 8.2.0-r0
- Bitnami/pillowfrom 0, < 8.2.0
- Debian/pillowfrom 0, < 8.1.2+dfsg-0.2
- PyPI/pillow>= 5.1.0, < 8.2.0
- PyPI/pillowfrom 0, < 8.2.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
References (13)
- ADVISORYhttps://github.com/advisories/GHSA-hjfx-8p6c-g7gx
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-28678
- ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2021-28678
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-28678
- PATCHhttps://github.com/python-pillow/Pillow
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-94.yaml
- WEBhttps://github.com/python-pillow/Pillow/pull/5377
- WEBhttps://github.com/python-pillow/Pillow/pull/5377/commits/496245aa4365d0827390bd0b6fbd11287453b3a1
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
- WEBhttps://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28678-fix-blp-dos
- WEBhttps://security.gentoo.org/glsa/202107-33