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CVE-2021-29511— Memory over-allocation in evm crate

Quick assessment

Affected
rust-blockchain evm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rust是Mozilla基金会的一款通用、编译型编程语言。 Rust 存在安全漏洞。攻击者可通过该漏洞使程序拒绝服务。

CVSS 6.5 · Medium EPSS 1.28% · P68

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-29511

Vulnerability Information
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Vulnerability Title
Memory over-allocation in evm crate
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Rust 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rust是Mozilla基金会的一款通用、编译型编程语言。 Rust 存在安全漏洞。攻击者可通过该漏洞使程序拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rust-blockchain evm < 0.21.1 -

II. Public POCs for CVE-2021-29511

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III. Intelligence Information for CVE-2021-29511

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Patches & Fixes for CVE-2021-29511 (1)

Vendor Advisories for CVE-2021-29511 (1)

Vendor Pages for CVE-2021-29511 (1)

IV. Related Vulnerabilities

Same product: evm
Same vendor: rust-blockchain
Same weakness: CWE-770

V. Comments for CVE-2021-29511

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