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.
References
Link | Resource |
---|---|
https://blog.ethereum.org/2020/11/12/geth_security_release/ | Vendor Advisory |
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-69v6-xc2j-r2jf | Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2020-11-25T01:25:20
Updated: 2020-11-25T01:25:20
Reserved: 2020-10-01T00:00:00
Link: CVE-2020-26241
JSON object: View
NVD Information
Status : Analyzed
Published: 2020-11-25T02:15:11.047
Modified: 2020-12-03T15:48:38.977
Link: CVE-2020-26241
JSON object: View
Redhat Information
No data.
CWE