{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-29511",
        "STATE": "PUBLIC",
        "TITLE": "Memory over-allocation in evm crate"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "evm",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 0.21.1"
                                        },
                                        {
                                            "version_value": "= 0.22.0"
                                        },
                                        {
                                            "version_value": "= 0.23.0"
                                        },
                                        {
                                            "version_value": "= 0.24.0"
                                        },
                                        {
                                            "version_value": "= 0.25.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "rust-blockchain"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "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."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "{\"CWE-770\":\"Allocation of Resources Without Limits or Throttling\"}"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/rust-blockchain/evm/security/advisories/GHSA-4jwq-572w-4388",
                "refsource": "CONFIRM",
                "url": "https://github.com/rust-blockchain/evm/security/advisories/GHSA-4jwq-572w-4388"
            },
            {
                "name": "https://github.com/rust-blockchain/evm/commit/19ade858c430ab13eb562764a870ac9f8506f8dd",
                "refsource": "MISC",
                "url": "https://github.com/rust-blockchain/evm/commit/19ade858c430ab13eb562764a870ac9f8506f8dd"
            },
            {
                "name": "https://crates.io/crates/evm",
                "refsource": "MISC",
                "url": "https://crates.io/crates/evm"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-4jwq-572w-4388",
        "discovery": "UNKNOWN"
    }
}