SB2021082435 - Buffer overflow in go-ethereum

Description

This security bulletin contains information about 1 vulnerability.

1) Buffer overflow (CVE-ID: CVE-2021-39137)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to cause a consensus error.

The vulnerability exists due to memory corruption in the Geth EVM when processing a maliciously crafted transaction. A remote attacker can send a maliciously crafted transaction to cause a consensus error.

Successful exploitation can cause vulnerable nodes to compute a different stateRoot and reject the canonical chain, potentially splitting the chain into two forks.

Remediation

Install update from vendor's website.

References

• https://github.com/ethereum/go-ethereum/security/advisories/GHSA-9856-9gg9-qcmq
• https://github.com/advisories/GHSA-9856-9gg9-qcmq