CVE-2018-20421

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Go Ethereum (aka geth) 1.8.19 allows attackers to cause a denial of service (memory consumption) by rewriting the length of a dynamic array in memory, and then writing data to a single memory location with a large index number, as demonstrated by use of "assembly { mstore }" followed by a "c[0xC800000] = 0xFF" assignment.

Go Ethereum (también conocido como geth) 1.8.19 permite que los atacantes provoquen una denegación de servicio (consumo de memoria) mediante la reescritura de la longitud de un array dinámico en la memoria y, a continuación, la escritura de datos a una única ubicación de memoria con un número de índice largo. Esto queda demostrado por el uso de "assembly { mstore }", seguido por una asignación "c[0xC800000] = 0xFF".

*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

2018-12-23 CVE Reserved
2018-12-24 CVE Published
2024-09-17 CVE Updated
2024-09-17 First Exploit
2024-11-02 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://github.com/ethereum/go-ethereum/issues/18289	2024-09-17

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
Ethereum Search vendor "Ethereum"		Go Ethereum Search vendor "Ethereum" for product "Go Ethereum"				1.8.19 Search vendor "Ethereum" for product "Go Ethereum" and version "1.8.19"		-		Affected