CVE-2021-42073

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-42073", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2024-08-04T03:22:26.062Z", "dateReserved": "2021-10-07T00:00:00.000Z", "datePublished": "2021-11-08T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2023-11-13T21:54:34.614Z"}, "descriptions": [{"lang": "en", "value": "An issue was discovered in Barrier before 2.4.0. An attacker can enter an active session state with the barriers component (aka the server-side implementation of Barrier) simply by supplying a client label that identifies a valid client configuration. This label is \"Unnamed\" by default but could instead be guessed from hostnames or other publicly available information. In the active session state, an attacker can capture input device events from the server, and also modify the clipboard content on the server."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"name": "[oss-security] 20211102 Barrier \"software KVM switch\" multiple remote security issues", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2021/11/02/4"}, {"url": "https://github.com/debauchee/barrier/releases/tag/v2.4.0"}, {"url": "https://github.com/debauchee/barrier/commit/b5adc93e2bd74cb094f91ff595c07f321a489f3e"}, {"url": "https://github.com/debauchee/barrier/commit/229abab99f39f11624e5651f819e7f1f8eddedcc"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T03:22:26.062Z"}, "title": "CVE Program Container", "references": [{"name": "[oss-security] 20211102 Barrier \"software KVM switch\" multiple remote security issues", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/11/02/4"}, {"url": "https://github.com/debauchee/barrier/releases/tag/v2.4.0", "tags": ["x_transferred"]}, {"url": "https://github.com/debauchee/barrier/commit/b5adc93e2bd74cb094f91ff595c07f321a489f3e", "tags": ["x_transferred"]}, {"url": "https://github.com/debauchee/barrier/commit/229abab99f39f11624e5651f819e7f1f8eddedcc", "tags": ["x_transferred"]}]}]}}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:barrier_project:barrier:*:*:*:*:*:*:*:*", "matchCriteriaId": "89241378-037D-48B8-8090-1DBA03515503", "versionEndExcluding": "2.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Barrier before 2.4.0. An attacker can enter an active session state with the barriers component (aka the server-side implementation of Barrier) simply by supplying a client label that identifies a valid client configuration. This label is \"Unnamed\" by default but could instead be guessed from hostnames or other publicly available information. In the active session state, an attacker can capture input device events from the server, and also modify the clipboard content on the server."}, {"lang": "es", "value": "Se ha detectado un problema en Barrier versiones anteriores a 2.4.0. Un atacante puede entrar en un estado de sesi\u00f3n activo con el componente de barreras (tambi\u00e9n se conoce como la implementaci\u00f3n del lado del servidor de Barrier) simplemente proporcionando una etiqueta de cliente que identifique una configuraci\u00f3n de cliente v\u00e1lida. Esta etiqueta es \"Unnamed\" por defecto, pero podr\u00eda adivinarse a partir de nombres de host u otra informaci\u00f3n disponible p\u00fablicamente. En el estado de sesi\u00f3n activa, un atacante puede capturar eventos de dispositivos de entrada del servidor, y tambi\u00e9n modificar el contenido del portapapeles en el servidor"}], "id": "CVE-2021-42073", "lastModified": "2026-06-17T04:09:15.847", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-11-08T04:15:08.500", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/11/02/4"}, {"source": "cve@mitre.org", "url": "https://github.com/debauchee/barrier/commit/229abab99f39f11624e5651f819e7f1f8eddedcc"}, {"source": "cve@mitre.org", "url": "https://github.com/debauchee/barrier/commit/b5adc93e2bd74cb094f91ff595c07f321a489f3e"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/debauchee/barrier/releases/tag/v2.4.0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/11/02/4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/debauchee/barrier/commit/229abab99f39f11624e5651f819e7f1f8eddedcc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/debauchee/barrier/commit/b5adc93e2bd74cb094f91ff595c07f321a489f3e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/debauchee/barrier/releases/tag/v2.4.0"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-384"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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