CVE-2020-26240

Erroneous Proof of Work calculation in geth

Severity Score

7.5

*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. An ethash mining DAG generation flaw in Geth before version 1.9.24 could cause miners to erroneously calculate PoW in an upcoming epoch (estimated early January, 2021). This happened on the ETC chain on 2020-11-06. This issue is relevant only for miners, non-mining nodes are unaffected. This issue is fixed as of 1.9.24

Go Ethereum, o "Geth", es la implementación oficial de Golang del protocolo Ethereum. Un fallo de generación DAG de minería ethash en Geth versiones anteriores a 1.9.24, podría causar a unos mineros calcular erróneamente PoW en una época próxima (estimada a principios de enero de 2021). Esto sucedió en la cadena ETC el 06-11-2020. Este problema es relevante solo para mineros, los nodos que no son mineros no están afectados. Este problema es corregido desde la versión 1.9.24

*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

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

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

2020-10-01 CVE Reserved
2020-11-25 CVE Published
2024-08-04 CVE Updated
2024-09-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-682: Incorrect Calculation

CAPEC

References (4)

URL	Tag	Source
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-v592-xf75-856p	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/ethereum/go-ethereum/commit/d990df909d7839640143344e79356754384dcdd0	2020-12-03
https://github.com/ethereum/go-ethereum/pull/21793	2020-12-03

URL	Date	SRC
https://blog.ethereum.org/2020/11/12/geth_security_release	2020-12-03

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"				< 1.9.24 Search vendor "Ethereum" for product "Go Ethereum" and version " < 1.9.24"		-		Affected