CVE-2020-26241
Summary
| CVE | CVE-2020-26241 |
|---|
| State | PUBLIC |
|---|
| Assigner | [email protected] |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
|---|
| Published | 2020-11-25 02:15:00 UTC |
|---|
| Updated | 2020-12-03 15:48:00 UTC |
|---|
| Description | 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. |
|---|
NVD Known Affected Configurations (CPE 2.3)
References
| Reference | Source | Link | Tags |
|---|
| Shallow copy in the 0x4 precompile could lead to EVM memory corruption · Advisory · ethereum/go-ethereum · GitHub |
CONFIRM |
github.com |
Third Party Advisory |
| Geth security release | Ethereum Foundation Blog |
MISC |
blog.ethereum.org |
Vendor Advisory |
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 982039 Go (go) Security Update for github.com/ethereum/go-ethereum/core/vm (GHSA-69v6-xc2j-r2jf)
