CVE-2021-23437

Regular Expression Denial of Service (ReDoS)

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The package pillow 5.2.0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.

El paquete pillow versiones desde la versión 5.2.0 y anteriores a 8.3.2, son vulnerables a una Denegación de Servicio por Expresión Regular (ReDoS) por medio de la función getrgb

*Credits: Liyuan Chen

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-08 CVE Reserved
2021-09-03 CVE Published
2024-05-19 EPSS Updated
2024-09-16 CVE Updated
2024-09-16 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (7)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2024/03/msg00021.html	Mailing List

URL	Date	SRC
https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443	2024-09-16

URL	Date	SRC
https://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b	2024-03-22

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C	2024-03-22
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT	2024-03-22
https://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html	2024-03-22
https://security.gentoo.org/glsa/202211-10	2024-03-22

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Python Search vendor "Python"		Pillow Search vendor "Python" for product "Pillow"				>= 5.2.0 < 8.3.2 Search vendor "Python" for product "Pillow" and version " >= 5.2.0 < 8.3.2"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected