CVE-2021-28678

MEDIUM

Python Pillow < 8.2.0 - Data Authenticity Bypass

Title source: rule

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.

References (4)

[Patch, Third Party Advisory] https://github.com/python-pillow/Pillow/pull/5377

[Release Notes, Vendor Advisory] https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28678-fix-blp-dos

[Third Party Advisory] https://security.gentoo.org/glsa/202107-33

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/

Scores

CVSS v3 5.5

EPSS 0.0011

EPSS Percentile 29.4%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Classification

CWE

CWE-345

Status published

Affected Products (3)

python/pillow < 8.2.0

fedoraproject/fedora

pypi/Pillow < 8.2.0PyPI

Timeline

Published Jun 02, 2021

Tracked Since Feb 18, 2026