cvelist/2020/15xxx/CVE-2020-15091.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2020-15091",
        "STATE": "PUBLIC",
        "TITLE": "Denial of Service in TenderMint"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "tendermint",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": ">= 0.33.0, < 0.33.6"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "tendermint"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "TenderMint from version 0.33.0 and before version 0.33.6 allows block proposers to include signatures for the wrong block. This may happen naturally if you start a network, have it run for some time and restart it (**without changing chainID**). A malicious block proposer (even with a minimal amount of stake) can use this vulnerability to completely halt the network. This issue is fixed in Tendermint 0.33.6 which checks all the signatures are for the block with 2/3+ majority before creating a commit."
            }
        ]
    },
    "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-347\":\"Improper Verification of Cryptographic Signature\"}"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3",
                "refsource": "CONFIRM",
                "url": "https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3"
            },
            {
                "name": "https://github.com/tendermint/tendermint/issues/4926",
                "refsource": "MISC",
                "url": "https://github.com/tendermint/tendermint/issues/4926"
            },
            {
                "name": "https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340",
                "refsource": "MISC",
                "url": "https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-6jqj-f58p-mrw3",
        "discovery": "UNKNOWN"
    }
}