CVE-2021-34600

{"containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "CompasX", "vendor": "Telenot Electronic GmbH", "versions": [{"lessThan": "32.0", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "X41 D-SEC GmbH, Markus Vervier, Yasar Klawohn"}], "datePublic": "2022-01-17T23:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Telenot CompasX versions prior to 32.0 use a weak seed for random number generation leading to predictable AES keys used in the NFC tags used for local authorization of users. This may lead to total loss of trustworthiness of the installation.</p>"}], "value": "Telenot CompasX versions prior to 32.0 use a weak seed for random number generation leading to predictable AES keys used in the NFC tags used for local authorization of users. This may lead to total loss of trustworthiness of the installation."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-335", "description": "CWE-335 Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "270ccfa6-a436-4e77-922e-914ec3a9685c", "shortName": "CERTVDE", "dateUpdated": "2023-08-09T10:43:57.672Z"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://www.x41-dsec.de/lab/advisories/x41-2021-003-telenot-complex-insecure-keygen/"}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Update to CompasX versions &gt;= 32.0</p>"}], "value": "Update to CompasX versions >= 32.0"}], "source": {"defect": ["CERT@VDE#64025"], "discovery": "EXTERNAL"}, "title": "Telenot complex: Insecure AES Key Generation", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>It is strongly recommended to raise the security level during the time window until the AES keys can be changed to securely generated ones. The complex alarm systems supports alternative authentication factors that can be combined with the Desfire NFC tag authentication. An example for such an additional factor is a requirement for a valid PIN entry on the complex alarm system in addition to a successful Desfire authentication to disarm the alarm.</p>"}], "value": "It is strongly recommended to raise the security level during the time window until the AES keys can be changed to securely generated ones. The complex alarm systems supports alternative authentication factors that can be combined with the Desfire NFC tag authentication. 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The complex alarm systems supports alternative authentication factors that can be combined with the Desfire NFC tag authentication. An example for such an additional factor is a requirement for a valid PIN entry on the complex alarm system in addition to a successful Desfire authentication to disarm the alarm."}]}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T00:19:47.434Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.x41-dsec.de/lab/advisories/x41-2021-003-telenot-complex-insecure-keygen/"}]}]}, "cveMetadata": {"assignerOrgId": "270ccfa6-a436-4e77-922e-914ec3a9685c", "assignerShortName": "CERTVDE", "cveId": "CVE-2021-34600", "datePublished": "2022-01-20T11:40:11.195Z", "dateReserved": "2021-06-10T00:00:00.000Z", "dateUpdated": "2024-09-16T19:04:37.485Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "CompasX", "vendor": "Telenot Electronic GmbH", "versions": [{"lessThan": "32.0", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "info@cert.vde.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:telenot:compasx:*:*:*:*:*:*:*:*", "matchCriteriaId": "F1FA52CE-8A90-48A1-A922-26DCF9C0BC5D", "versionEndExcluding": "32.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Telenot CompasX versions prior to 32.0 use a weak seed for random number generation leading to predictable AES keys used in the NFC tags used for local authorization of users. This may lead to total loss of trustworthiness of the installation."}, {"lang": "es", "value": "Las versiones de Telenot CompasX anteriores a la 32.0 utilizan una semilla d\u00e9bil para la generaci\u00f3n de n\u00fameros aleatorios, lo que hace que las claves AES utilizadas en las etiquetas NFC para la autorizaci\u00f3n local de los usuarios sean predecibles. Esto puede llevar a la p\u00e9rdida total de la fiabilidad de la instalaci\u00f3n"}], "id": "CVE-2021-34600", "lastModified": "2026-06-17T03:56:12.897", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.9, "confidentialityImpact": "COMPLETE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "info@cert.vde.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Secondary"}]}, "published": "2022-01-20T12:15:08.240", "references": [{"source": "info@cert.vde.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://www.x41-dsec.de/lab/advisories/x41-2021-003-telenot-complex-insecure-keygen/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://www.x41-dsec.de/lab/advisories/x41-2021-003-telenot-complex-insecure-keygen/"}], "sourceIdentifier": "info@cert.vde.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-335"}], "source": "info@cert.vde.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-335"}], "source": "nvd@nist.gov", "type": "Secondary"}]}

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