CVE-2020-26240

Erroneous Proof of Work calculation in geth

Description

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. An ethash mining DAG generation flaw in Geth before version 1.9.24 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. This issue is fixed as of 1.9.24

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.27%
Vendor Advisory ethereum.org
Affected: ethereum go-ethereum
Published at:
Updated at:

References

Link Tags
https://blog.ethereum.org/2020/11/12/geth_security_release/ vendor advisory
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-v592-xf75-856p third party advisory
https://github.com/ethereum/go-ethereum/pull/21793 third party advisory patch
https://github.com/ethereum/go-ethereum/commit/d990df909d7839640143344e79356754384dcdd0 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2020-26240?
CVE-2020-26240 has been scored as a medium severity vulnerability.
How to fix CVE-2020-26240?
To fix CVE-2020-26240, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-26240 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-26240 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-26240?
CVE-2020-26240 affects ethereum go-ethereum.
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