CVE-2020-26241

Published: Nov 25, 2020 Last Modified: Nov 21, 2024 EU-VD ID: EUVD-2021-1275 Aliases: GHSA-69v6-xc2j-r2jf
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: high
Availability: none
MEDIUM 5,5
Source: [email protected]
Access Vector: network
Access Complexity: low
Authentication: single
Confidentiality: none
Integrity: partial
Availability: partial

Description

AI Translation Available

Go Ethereum, or 'Geth', is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth before version 1.9.17 which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth's pre-compiled dataCopy (at 0x00...04) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls 0x00..04 with R as an argument, then overwrites R to Y, and finally invokes the RETURNDATACOPY opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed in version 1.9.17.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0030
Percentile
0,5th
Updated

EPSS Score Trend (Last 91 Days)

682

Incorrect Calculation

Draft
Abstraction: Pillar Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality Access Control
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Other) Execute Unauthorized Code Or Commands Gain Privileges Or Assume Identity Bypass Protection Mechanism
Applicable Platforms
All platforms may be affected
Likelihood of Exploit: High
View CWE Details
Application

Go Ethereum by Ethereum

Product Information
Vendor Ethereum
Product Go Ethereum
Version Range Affected
To 1.9.17 (exclusive)
cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://blog.ethereum.org/2020/11/12/geth_security_release/
Vendor Advisory
https://blog.ethereum.org/2020/11/12/geth_security_release/
https://github.com/ethereum/go-ethereum/security/advisories…
Third Party Advisory
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-69v6-xc2j-r2jf
https://blog.ethereum.org/2020/11/12/geth_security_release/
Vendor Advisory
https://blog.ethereum.org/2020/11/12/geth_security_release/
https://github.com/ethereum/go-ethereum/security/advisories…
Third Party Advisory
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-69v6-xc2j-r2jf