VDB
CVE-2020-26241
CVE-2020-26241
PUBLISHED
CVSS 6.5 MEDIUM
Reported by GitHub_M · Published November 25, 2020
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.
Risk Scores
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| ethereum | go-ethereum | >= 1.9.7, < 1.9.17 |
| github.com | ethereum/go-ethereum/eth | 0, 0, 0 |
| ethereum | go-ethereum | >= 1.9.7, < 1.9.17, *, * |
| github.com | ethereum/go-ethereum | 1.9.7, 1.9.7, 1.9.7 |
| github.com | ethereum/go-ethereum/core/vm | 0, 0, 0 |
| github.com | ethereum/go-ethereum/cmd/evm | 0, 0, 0 |
Timeline
- Nov 25, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 22, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 25, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 27, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 2, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
References
- x_refsource_MISC
- x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2020-26241 advisory
- https://github.com/advisories/GHSA-69v6-xc2j-r2jf advisory
- https://github.com/ethereum/go-ethereum/commit/295693759e5ded05fec0b2fb39359965b60da785 patch
- https://blog.ethereum.org/2020/11/12/geth_security_release url
- https://github.com/ethereum/go-ethereum url