CVE-2021-29511 Information

Description

evm is a pure Rust implementation of Ethereum Virtual Machine. Prior to the patch when executing specific EVM opcodes related to memory operations that use evm_core::Memory::copy_large the evm crate can over-allocate memory when it is not needed making it possible for an attacker to perform denial-of-service attack. The flaw was corrected in commit 19ade85. Users should upgrade to ==0.21.1 ==0.23.1 ==0.24.1 ==0.25.1 >=0.26.1. There are no workarounds. Please upgrade your evm crate version.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/rust-blockchain/evm/commit/19ade858c430ab13eb562764a870ac9f8506f8dd https://github.com/rust-blockchain/evm/security/advisories/GHSA-4jwq-572w-4388 https://crates.io/crates/evm

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5