{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2020-5234",
        "STATE": "PUBLIC",
        "TITLE": "Untrusted data can lead to DoS attack in MessagePack for C# and Unity"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "MessagePack",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.9.3"
                                        },
                                        {
                                            "version_value": ">= 2.0.0, < 2.1.80"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MessagePack.ImmutableCollection",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.9.3"
                                        },
                                        {
                                            "version_value": ">= 2.0.0, < 2.1.80"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MessagePack.ReactiveProperty",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.9.3"
                                        },
                                        {
                                            "version_value": ">= 2.0.0, < 2.1.80"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MessagePack.UnityShims",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.9.3"
                                        },
                                        {
                                            "version_value": "\t >= 2.0.0, < 2.1.80"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "neuecc"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "MessagePack for C# and Unity before version 1.9.3 and 2.1.80 has a vulnerability where untrusted data can lead to DoS attack due to hash collisions and stack overflow. Review the linked GitHub Security Advisory for more information and remediation steps."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-121: Stack-based Buffer Overflow"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/neuecc/MessagePack-CSharp/security/advisories/GHSA-7q36-4xx7-xcxf",
                "refsource": "CONFIRM",
                "url": "https://github.com/neuecc/MessagePack-CSharp/security/advisories/GHSA-7q36-4xx7-xcxf"
            },
            {
                "name": "https://github.com/neuecc/MessagePack-CSharp/commit/56fa86219d01d0a183babbbbcb34abbdea588a02",
                "refsource": "MISC",
                "url": "https://github.com/neuecc/MessagePack-CSharp/commit/56fa86219d01d0a183babbbbcb34abbdea588a02"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-7q36-4xx7-xcxf",
        "discovery": "UNKNOWN"
    }
}