ethereum/go-ethereum · Security
Erroneous Proof of Work calculation in geth
- GHSA ID
- GHSA-v592-xf75-856p
- CVE ID
- CVE-2020-26240
- Severity
- medium
- Published
- Updated
- CVSS
- 5.3 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- CVSS v3
- 5.3 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Description
Impact
An ethash mining DAG generation flaw in Geth could cause miners to erroneously calculate PoW in an upcoming epoch (estimated early January, 2021). This happened on the ETC chain on 2020-11-06. This issue is relevant only for miners, non-mining nodes are unaffected.
Patches
This issue is also fixed as of 1.9.24. Thanks to @slavikus for bringing the issue to our attention and writing the fix.
Workarounds
This PR implements a patch: https://github.com/ethereum/go-ethereum/pull/21793
References
https://blog.ethereum.org/2020/11/12/geth_security_release/
For more information
If you have any questions or comments about this advisory:
- Open an issue in go-ethereum
- Email us at [email protected]
CWEs
- CWE-682 · Incorrect Calculation
References
- https://github.com/ethereum/go-ethereum/security/advisories/GHSA-v592-xf75-856p ↗
- https://nvd.nist.gov/vuln/detail/CVE-2020-26240 ↗
- https://github.com/ethereum/go-ethereum/pull/21793 ↗
- https://github.com/ethereum/go-ethereum/commit/d990df909d7839640143344e79356754384dcdd0 ↗
- https://blog.ethereum.org/2020/11/12/geth_security_release ↗
- https://github.com/advisories/GHSA-v592-xf75-856p ↗