CVE Vulnerability

CVE-2020-26241

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.

5.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

7.1 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-69v6-xc2j-r2jf Third Party Advisory
https://blog.ethereum.org/2020/11/12/geth_security_release/ Vendor Advisory
Configurations

Configuration 1

cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:*
Information

Published : 2020-11-25 02:15

Updated : 2020-12-03 03:48

NVD link : CVE-2020-26241

Mitre link : CVE-2020-26241

Products Affected
No products.
CWE
CWE-682