{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-21T03:09:58.453","vulnerabilities":[{"cve":{"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 versión 4.3.0 antes de las versiones 4.7.12, 4.8.7 y 4.9.3, es vulnerable a una denegación de servicio (DoS). Cuando se configura para aceptar la autenticación por smartcard, el KDC de Samba llamará a talloc_free() dos veces en la misma memoria si la entidad de seguridad en un certificado firmado de forma válida no coincide con la entidad en AS-REQ. Esto solo es posible tras la autenticación con un certificado de confianza. talloc es resistente a corrupción de una doble liberación (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"]}]}}]}