CVE-2021-30481

Severity Score

9.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Valve Steam through 2021-04-10, when a Source engine game is installed, allows remote authenticated users to execute arbitrary code because of a buffer overflow that occurs for a Steam invite after one click.

Valve Steam hasta el 10-04-2021, cuando un juego del motor de Origen es instalado, permite a usuarios autenticados remotos ejecutar código arbitrario debido a un desbordamiento del búfer que ocurre para una invitación de Steam después de un clic

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-10 CVE Reserved
2021-04-10 CVE Published
2021-04-20 First Exploit
2024-03-02 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CAPEC

References (5)

URL	Tag	Source
https://news.ycombinator.com/item?id=26762170	Issue Tracking
https://twitter.com/floesen_/status/1337107178096881666	Third Party Advisory

URL	Date	SRC
https://github.com/floesen/CVE-2021-30481	2021-04-20
https://twitter.com/the_secret_club/status/1380868759129296900	2024-08-03
https://www.youtube.com/watch?v=rNQn--9xR1Q	2024-08-03

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Valvesoftware Search vendor "Valvesoftware"		Steam Client Search vendor "Valvesoftware" for product "Steam Client"				<= 2021-04-10 Search vendor "Valvesoftware" for product "Steam Client" and version " <= 2021-04-10"		-		Affected