PT-2021-17671 · Pillow+9 · Pillow+9

CVE-2021-27922 · Published 2021-03-03 · Updated 2025-08-15

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: Pillow versions prior to 8.1.1

Description: The issue allows attackers to cause a denial of service due to memory consumption. This occurs because the reported size of a contained image is not properly checked for an ICNS container, leading to potentially very large attempted memory allocations.

Recommendations: For versions prior to 8.1.1, update to version 8.1.1 or later to resolve the issue. As a temporary workaround, consider restricting the processing of ICNS containers to minimize the risk of exploitation.

Fix

DoS

Resource Exhaustion

RCE

Weakness Enumeration

CWE-400

CWE-20

Related Identifiers

ALSA-2021:4149

ALT-PU-2021-1491

ALT-PU-2021-1617

BIT-PILLOW-2021-27922

CESA-2021_4149

CVE-2021-27922

GHSA-3WVG-MJ6G-M9CV

OESA-2021-1127

OESA-2021-1146

OPENSUSE-SU-2021:1134-1

OPENSUSE-SU-2021_1134-1

OPENSUSE-SU-2024_1673-1

PYSEC-2021-41

RHSA-2021:4149

RHSA-2021_4149

RLSA-2021:4149

SUSE-SU-2021:1938-1

SUSE-SU-2021:1939-1

SUSE-SU-2021:1940-1

SUSE-SU-2024:1673-1

SUSE-SU-2024:1673-2

USN-4763-1

Affected Products

Alt Linux

Almalinux

Astra Linux

Centos

Linuxmint

Pillow

Red Hat

Rocky Linux

Suse

Ubuntu

References · 135

• https://security.gentoo.org/glsa/202107-33 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-27923 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27922 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2021:1938-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-27922 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZ · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZ · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-25292 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27923 · Security Note
• https://osv.dev/vulnerability/BIT-pillow-2021-27922 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2021:4149 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1673-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4763-1 · Vendor Advisory
• https://pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQQY6472RX4J2SUJENWDZAWKTJJGP2ML · Vendor Advisory