CVE-2021-32816

Regular expression Denial of Service in ProtonMail

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

ProtonMail Web Client is the official AngularJS web client for the ProtonMail secure email service. ProtonMail Web Client before version 3.16.60 has a regular expression denial-of-service vulnerability. This was fixed in commit 6687fb. There is a full report available in the referenced GHSL-2021-027.

ProtonMail Web Client es el cliente web oficial de AngularJS para el servicio de correo electrónico seguro ProtonMail. ProtonMail Web Client versiones anteriores a 3.16.60, presenta una vulnerabilidad de denegación de servicio de expresión regular. Esto fue corregido en el commit 6687fb. Se presenta un reporte completo disponible en el GHSL-2021-027 referenciado

*Credits: N/A

CVSS Scores

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

Privileges Required

None

User Interaction

Required

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
2021-05-14 CVE Published
2024-01-28 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC
https://securitylab.github.com/advisories/GHSL-2021-027-redos-ProtonMail	2024-08-03

URL	Date	SRC
https://github.com/ProtonMail/WebClient/commit/6687fbb867ef872c96cf4fde68cb6e9c58d3fddc	2021-05-24

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Protonmail Search vendor "Protonmail"		Protonmail Search vendor "Protonmail" for product "Protonmail"				< 3.16.60 Search vendor "Protonmail" for product "Protonmail" and version " < 3.16.60"		-		Affected