CVE-2021-3689

Use of Predictable Algorithm in Random Number Generator in yiisoft/yii2

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator

yii2 es vulnerable al Uso de un Algoritmo Predecible en el Generador de Números Aleatorios

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-07 CVE Reserved
2021-08-10 CVE Published
2024-04-25 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-330: Use of Insufficiently Random Values
CWE-1241: Use of Predictable Algorithm in Random Number Generator

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC
https://huntr.dev/bounties/50aad1d4-eb00-4573-b8a4-dbe38e2c229f	2024-08-03

URL	Date	SRC
https://github.com/yiisoft/yii2/commit/13f27e4d920a05d53236139e8b07007acd046a46	2022-04-25

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Yiiframework Search vendor "Yiiframework"		Yii Search vendor "Yiiframework" for product "Yii"				>= 2.0.0 < 2.0.43 Search vendor "Yiiframework" for product "Yii" and version " >= 2.0.0 < 2.0.43"		-		Affected