CVE-2021-39137 Consensus flaw during block processing in go-ethereum

What is CVE-2021-39137?

CVE-2021-39137 is a medium-severity vulnerability in go-ethereum, published on 24 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

go-ethereum is the official Go implementation of the Ethereum protocol. In affected versions a consensus-vulnerability in go-ethereum (Geth) could cause a chain split, where vulnerable versions refuse to accept the canonical chain. Further details about the vulnerability will be disclosed at a later date. A patch is included in the upcoming `v1.10.8` release. No workaround are available.

Weakness: CWE-436

Which versions are affected by CVE-2021-39137?

3 open source packages ship an affected version, including github.com/ethereum/go-ethereum. It affects 1 product.

Products include Ethereum Go Ethereum.

How do I fix CVE-2021-39137?

Upgrade github.com/ethereum/go-ethereum to 1.10.8 or later.

Is CVE-2021-39137 being exploited?

There is no known exploitation of CVE-2021-39137 in the wild and no public exploit code.

Other vulnerabilities in go-ethereum

• CVE-2026-26314 Go Ethereum affected by DoS via malicious p2p message High 8.7
• CVE-2023-42319 go-ethereum vulnerable to denial of service via crafted GraphQL query High 7.5
• CVE-2023-40591 Denial of service via malicious p2p message in go-ethereum High 7.5
• CVE-2021-42219 Denial of service in go-ethereum High 7.5
• CVE-2022-23327 Denial of Service in Go-Ethereum High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9856-9gg9-qcmq, GO-2022-0254.