QID 982039

QID 982039: Go (go) Security Update for github.com/ethereum/go-ethereum/core/vm (GHSA-69v6-xc2j-r2jf)

Security update has been released for github.com/ethereum/go-ethereum/core/vm,github.com/ethereum/go-ethereum to fix the vulnerability.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

This is a Consensus vulnerability, which can be used to cause a chain-split where vulnerable nodes reject the canonical chain.

Geths pre-compiled `dataCopy` (at `0x00...04`) contract did a shallow copy on invocation. An attacker could deploy a contract that

- writes `X` to an EVM memory region `R`,
- calls `0x00..04` with `R` as an argument,
- overwrites `R` to `Y`,
- and finally invokes the `RETURNDATACOPY` opcode.

When this contract is invoked, a consensus-compliant node would push `X` on the EVM stack, whereas Geth would push `Y`.

CVSS V3 rated as High - 7.1 severity.

CVSS V2 rated as Medium - 5.5 severity.

Solution

Customers are advised to refer to GHSA-69v6-xc2j-r2jf for updates pertaining to this vulnerability.

Vendor References

GHSA-69v6-xc2j-r2jf - github.com/advisories/GHSA-69v6-xc2j-r2jf

CVEs related to QID 982039

CVE-2020-26241 |

Software Advisories

Advisory ID	Software	Component	Link
GHSA-69v6-xc2j-r2jf	github.com/ethereum/go-ethereum		github.com/advisories/GHSA-69v6-xc2j-r2jf
GHSA-69v6-xc2j-r2jf	github.com/ethereum/go-ethereum/core/vm		github.com/advisories/GHSA-69v6-xc2j-r2jf

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