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 |
Configurations
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