CVE-2021-32838

Regular Expression Denial of Service in flask-restx

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Flask-RESTX (pypi package flask-restx) is a community driven fork of Flask-RESTPlus. Flask-RESTX before version 0.5.1 is vulnerable to ReDoS (Regular Expression Denial of Service) in email_regex. This is fixed in version 0.5.1.

Flask-RESTX (paquete pypi flask-restx) es un fork impulsado por la comunidad de Flask-RESTPlus. Flask-RESTX versiones anteriores a 0.5.1, es vulnerable a ReDoS (Denegación de Servicio por Expresión Regular) en la función email_regex. Esto ha sido corregido en la versión 0.5.1

*Credits: N/A

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

2021-05-12 CVE Reserved
2021-09-20 CVE Published
2024-06-05 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (7)

URL	Tag	Source
https://github.com/advisories/GHSA-3q6g-vf58-7m4g	Third Party Advisory
https://pypi.org/project/flask-restx	Product

URL	Date	SRC

URL	Date	SRC
https://github.com/python-restx/flask-restx/blob/fd99fe11a88531f5f3441a278f7020589f9d2cc0/flask_restx/inputs.py#L51	2023-11-07
https://github.com/python-restx/flask-restx/commit/bab31e085f355dd73858fd3715f7ed71849656da	2023-11-07
https://github.com/python-restx/flask-restx/issues/372	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5UCTFVDU3677B5OBGK4EF5NMUPJLL6SQ	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QUD6SWZLX52AAZUHDETJ2CDMQGEPGFL3	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Flask-restx Project Search vendor "Flask-restx Project"		Flask-restx Search vendor "Flask-restx Project" for product "Flask-restx"				< 0.5.1 Search vendor "Flask-restx Project" for product "Flask-restx" and version " < 0.5.1"		python		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