Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
GHSA-69v6-xc2j-r2jf
No affected components available
Impact
This is a Consensus vulnerability, 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
Xto an EVM memory regionR, - calls
0x00..04withRas an argument, - overwrites
RtoY, - and finally invokes the
RETURNDATACOPYopcode.
When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y.
Patches
No standalone patches have been made.
Workarounds
Upgrade to 1.9.17 or higher.
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 security@ethereum.org
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
Browse More
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard