CVE-2019-15802

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The firmware hashes and encrypts passwords using a hardcoded cryptographic key in sal_util_str_encrypt() in libsal.so.0.0. The parameters (salt, IV, and key data) are used to encrypt and decrypt all passwords using AES256 in CBC mode. With the parameters known, all previously encrypted passwords can be decrypted. This includes the passwords that are part of configuration backups or otherwise embedded as part of the firmware."}, {"lang": "es", "value": "Se descubri\u00f3 un problema en los dispositivos Zyxel GS1900 con firmware anterior a la versi\u00f3n 2.50 (AAHH.0) C0. El firmware codifica y cifra las contrase\u00f1as con una clave criptogr\u00e1fica codificada en sal_util_str_encrypt () en libsal.so.0.0. Los par\u00e1metros (sal, IV y datos clave) se utilizan para cifrar y descifrar todas las contrase\u00f1as utilizando AES256 en modo CBC. Con los par\u00e1metros conocidos, se pueden descifrar todas las contrase\u00f1as previamente encriptadas. Esto incluye las contrase\u00f1as que forman parte de las copias de seguridad de la configuraci\u00f3n o que est\u00e1n integradas como parte del firmware."}], "id": "CVE-2019-15802", "lastModified": "2026-06-17T02:21:06.283", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-11-14T21:15:11.797", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-798"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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