PT-2021-6817 · Pillow+6 · Pillow+6

Liyuan Chen · Published 2021-09-03 · Updated 2024-06-15 · CVE-2021-23437

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Pillow versions 5.2.0 through 8.3.2 Pillow versions prior to 8.3.2

Description The issue is related to a Regular Expression Denial of Service (ReDoS) via the getrgb function, which can lead to uncontrolled resource consumption. This allows a remote attacker to cause a denial of service.

Recommendations For Pillow versions 5.2.0 through 8.3.2, update to a version after 8.3.2 to resolve the issue. For Pillow versions prior to 8.3.2, update to a version after 8.3.2 to resolve the issue. As a temporary workaround, consider disabling the getrgb function until a patch is available.

Exploit

Fix

DoS

Resource Exhaustion

Out of bounds Read

Weakness Enumeration

CWE-400

CWE-125

Related Identifiers

ALT-PU-2021-3028

ALT-PU-2023-7942

ALT-PU-2023-8182

BDU:2022-02242

BIT-PILLOW-2021-23437

CVE-2021-23437

DLA-3768-1

GHSA-98VV-PW6R-Q6Q4

MGASA-2021-0448

OESA-2021-1383

OPENSUSE-SU-2024:11209-1

OPENSUSE-SU-2024:13827-1

OPENSUSE-SU-2024_1673-1

PYSEC-2021-317

SNYK-PYTHON-PILLOW-1319443

SUSE-SU-2021:3234-1

SUSE-SU-2021:3235-1

SUSE-SU-2024:1673-1

SUSE-SU-2024:1673-2

USN-5227-1

USN-5227-2

Affected Products

Alt Linux

Astra Linux

Debian

Linuxmint

Pillow

Suse

Ubuntu

References · 93

• 🔥 https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443 · Exploit
• https://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b · Patch
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-23437 · Vendor Advisory
• https://security.gentoo.org/glsa/202211-10 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-23437 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:13827-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:3235-1 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-98vv-pw6r-q6q4 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2021-23437 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-34552 · Vendor Advisory
• https://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-23437 · Security Note