{ "id": "CVE-2018-16841", "sourceIdentifier": "secalert@redhat.com", "published": "2018-11-28T14:29:00.347", "lastModified": "2024-11-21T03:53:25.367", "vulnStatus": "Modified", "cveTags": [], "descriptions": [ { "lang": "en", "value": "Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba's KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process." }, { "lang": "es", "value": "Samba, desde la versi\u00f3n 4.3.0 antes de las versiones 4.7.12, 4.8.7 y 4.9.3, es vulnerable a una denegaci\u00f3n de servicio (DoS). Cuando se configura para aceptar la autenticaci\u00f3n por smartcard, el KDC de Samba llamar\u00e1 a talloc_free() dos veces en la misma memoria si la entidad de seguridad en un certificado firmado de forma v\u00e1lida no coincide con la entidad en AS-REQ. Esto solo es posible tras la autenticaci\u00f3n con un certificado de confianza. talloc es resistente a corrupci\u00f3n de una doble liberaci\u00f3n (double free) con talloc_free() y llama directamente a abort(), terminando el proceso KDC." } ], "metrics": { "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH" }, "exploitabilityScore": 2.8, "impactScore": 3.6 } ], "cvssMetricV30": [ { "source": "secalert@redhat.com", "type": "Secondary", "cvssData": { "version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H", "baseScore": 5.7, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH" }, "exploitabilityScore": 2.1, "impactScore": 3.6 } ], "cvssMetricV2": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "2.0", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "baseScore": 4.0, "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "PARTIAL" }, "baseSeverity": "MEDIUM", "exploitabilityScore": 8.0, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false } ] }, "weaknesses": [ { "source": "secalert@redhat.com", "type": "Secondary", "description": [ { "lang": "en", "value": "CWE-416" } ] }, { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "CWE-415" } ] } ], "configurations": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3.0", "versionEndExcluding": "4.7.12", "matchCriteriaId": "AFD5FEE5-66AE-4A6D-9ACC-0D1DBDCC3542" }, { "vulnerable": true, "criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8.0", "versionEndExcluding": "4.8.7", "matchCriteriaId": "952E46DC-D32E-4695-B835-19D07898713A" }, { "vulnerable": true, "criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.0", "versionEndExcluding": "4.9.3", "matchCriteriaId": "6711DD48-1D71-4F14-A071-8A3F08D84162" } ] } ] }, { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*", "matchCriteriaId": "8D305F7A-D159-4716-AB26-5E38BB5CD991" }, { "vulnerable": true, "criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "matchCriteriaId": "B5A6F2F3-4894-4392-8296-3B8DD2679084" }, { "vulnerable": true, "criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B" }, { "vulnerable": true, "criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D" }, { "vulnerable": true, "criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*", "matchCriteriaId": "07C312A0-CD2C-4B9C-B064-6409B25C278F" } ] } ] }, { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252" } ] } ] } ], "references": [ { "url": "http://www.securityfocus.com/bid/106023", "source": "secalert@redhat.com", "tags": [ "Third Party Advisory", "VDB Entry" ] }, { "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841", "source": "secalert@redhat.com", "tags": [ "Issue Tracking", "Third Party Advisory" ] }, { "url": "https://security.gentoo.org/glsa/202003-52", "source": "secalert@redhat.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://security.netapp.com/advisory/ntap-20181127-0001/", "source": "secalert@redhat.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://usn.ubuntu.com/3827-1/", "source": "secalert@redhat.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://usn.ubuntu.com/3827-2/", "source": "secalert@redhat.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://www.debian.org/security/2018/dsa-4345", "source": "secalert@redhat.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://www.samba.org/samba/security/CVE-2018-16841.html", "source": "secalert@redhat.com", "tags": [ "Patch", "Vendor Advisory" ] }, { "url": "http://www.securityfocus.com/bid/106023", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Third Party Advisory", "VDB Entry" ] }, { "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Issue Tracking", "Third Party Advisory" ] }, { "url": "https://security.gentoo.org/glsa/202003-52", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Third Party Advisory" ] }, { "url": "https://security.netapp.com/advisory/ntap-20181127-0001/", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Third Party Advisory" ] }, { "url": "https://usn.ubuntu.com/3827-1/", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Third Party Advisory" ] }, { "url": "https://usn.ubuntu.com/3827-2/", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Third Party Advisory" ] }, { "url": "https://www.debian.org/security/2018/dsa-4345", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Third Party Advisory" ] }, { "url": "https://www.samba.org/samba/security/CVE-2018-16841.html", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Patch", "Vendor Advisory" ] } ] }