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.
Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2020-11-25 02:15

Updated : 2024-02-28 18:08


NVD link : CVE-2020-26241

Mitre link : CVE-2020-26241

CVE.ORG link : CVE-2020-26241


JSON object : View

Products Affected

ethereum

  • go_ethereum
CWE
CWE-682

Incorrect Calculation