{"containers": {"cna": {"affected": [{"product": "Geyser", "vendor": "GeyserMC", "versions": [{"status": "affected", "version": "<= 1.4.1-SNAPSHOT"}]}], "descriptions": [{"lang": "en", "value": "Geyser is a bridge between Minecraft: Bedrock Edition and Minecraft: Java Edition. Versions of Geyser prior to 1.4.2-SNAPSHOT allow anyone that can connect to the server to forge a LoginPacket with manipulated JWT token allowing impersonation as any user. Version 1.4.2-SNAPSHOT contains a patch for the issue. There are no known workarounds aside from upgrading."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "description": "CWE-287: Improper Authentication", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-08-30T23:00:12.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/GeyserMC/Geyser/security/advisories/GHSA-h77f-xxx7-4858"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6"}, {"tags": ["x_refsource_MISC"], "url": "https://updates.playhive.com/weekend-maintenance-disclosure-2kJMaY"}], "source": {"advisory": "GHSA-h77f-xxx7-4858", "discovery": "UNKNOWN"}, "title": "User impersonation due to incorrect handling of the login JWT", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-39177", "STATE": "PUBLIC", "TITLE": "User impersonation due to incorrect handling of the login JWT"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Geyser", "version": {"version_data": [{"version_value": "<= 1.4.1-SNAPSHOT"}]}}]}, "vendor_name": "GeyserMC"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Geyser is a bridge between Minecraft: Bedrock Edition and Minecraft: Java Edition. Versions of Geyser prior to 1.4.2-SNAPSHOT allow anyone that can connect to the server to forge a LoginPacket with manipulated JWT token allowing impersonation as any user. Version 1.4.2-SNAPSHOT contains a patch for the issue. There are no known workarounds aside from upgrading."}]}, "impact": {"cvss": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-287: Improper Authentication"}]}]}, "references": {"reference_data": [{"name": "https://github.com/GeyserMC/Geyser/security/advisories/GHSA-h77f-xxx7-4858", "refsource": "CONFIRM", "url": "https://github.com/GeyserMC/Geyser/security/advisories/GHSA-h77f-xxx7-4858"}, {"name": "https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6", "refsource": "MISC", "url": "https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6"}, {"name": "https://updates.playhive.com/weekend-maintenance-disclosure-2kJMaY", "refsource": "MISC", "url": "https://updates.playhive.com/weekend-maintenance-disclosure-2kJMaY"}]}, "source": {"advisory": "GHSA-h77f-xxx7-4858", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T01:58:18.223Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/GeyserMC/Geyser/security/advisories/GHSA-h77f-xxx7-4858"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://updates.playhive.com/weekend-maintenance-disclosure-2kJMaY"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2021-39177", "datePublished": "2021-08-30T23:00:12.000Z", "dateReserved": "2021-08-16T00:00:00.000Z", "dateUpdated": "2024-08-04T01:58:18.223Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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