CVE-2020-26264

LES Server DoS via GetProofsV2

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.25 a denial-of-service vulnerability can make a LES server crash via malicious GetProofsV2 request from a connected LES client. This vulnerability only concerns users explicitly enabling les server; disabling les prevents the exploit. The vulnerability was patched in version 1.9.25.

Go Ethereum, o "Geth", es la implementación oficial de Golang del protocolo Ethereum. En Geth versiones anteriores a 1.9.25, una vulnerabilidad de Denegación de Servicio puede hacer a un servidor LES bloquearse por medio de una petición GetProofsV2 maliciosa de un cliente LES conectado. Esta vulnerabilidad solo afecta a usuarios que habilitan explícitamente el servidor de archivos; deshabilitar archivos evita la explotación. La vulnerabilidad fue parcheada en versión 1.9.25

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-10-01 CVE Reserved
2020-12-11 CVE Published
2023-08-14 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (4)

URL	Tag	Source
https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25	Third Party Advisory
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46	2020-12-14
https://github.com/ethereum/go-ethereum/pull/21896	2020-12-14

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"				< 1.9.25 Search vendor "Ethereum" for product "Go Ethereum" and version " < 1.9.25"		-		Affected