Buffer overflow in Evm Project
CVE-2021-29511
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.
EPSS: 0.013 (67.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Evm_project Evm — versions 0.22.0, 0.23.0, 0.24.0
- Rust-blockchain Evm — versions < 0.21.1, = 0.22.0, = 0.23.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-29511?
- CVE-2021-29511 is a medium-severity vulnerability in Evm Project, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2021-05-12.
- How severe is CVE-2021-29511?
- Medium severity. CVSS v3 base score is 6.5 out of 10.