CVE-2019-19344

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{}

{"affected": [{"affectedData": [{"product": "samba", "vendor": "Red Hat", "versions": [{"status": "affected", "version": "all samba 4.11.x versions before 4.11.5"}, {"status": "affected", "version": "all samba 4.10.x versions before 4.10.12"}, {"status": "affected", "version": "all samba 4.9.x versions before 4.9.18"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "matchCriteriaId": "90EC6BC6-BE25-4A68-852D-B58BCA1A6624", "versionEndExcluding": "4.9.18", "versionStartIncluding": "4.9.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "matchCriteriaId": "B7487A1D-2694-41FC-895C-4679A6595EBE", "versionEndExcluding": "4.10.12", "versionStartIncluding": "4.10.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "matchCriteriaId": "B316BA8C-6822-49AA-8198-52E779B717DF", "versionEndExcluding": "4.11.5", "versionStartIncluding": "4.11.0", 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"85F6D2BF-23EA-4D44-8126-64EA85184D38", "vulnerable": true}, {"criteria": "cpe:2.3:a:synology:skynas:-:*:*:*:*:*:*:*", "matchCriteriaId": "7C997777-BE79-4F77-90D7-E1A71D474D88", "vulnerable": true}, {"criteria": "cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:*", "matchCriteriaId": "D9685B12-824F-42AD-B87C-6E7A78BB7FA5", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "matchCriteriaId": "B620311B-34A3-48A6-82DF-6F078D7A4493", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "There is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x versions before 4.11.5, essentially due to a call to realloc() while other local variables still point at the original buffer."}, {"lang": "es", "value": "Se presenta un problema de uso de la memoria previamente liberada en todas las versiones 4.9.x anteriores a 4.9.18 de samba, todas las versiones 4.10.x anteriores a 4.10.12 de samba y todas las versiones 4.11.x anteriores a 4.11.5 de samba, esencialmente debido a una llamada a la funci\u00f3n realloc() mientras que otras variables locales a\u00fan apuntan al b\u00fafer original."}], "id": "CVE-2019-19344", "lastModified": "2026-06-17T02:26:32.480", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-01-21T18:15:12.937", "references": [{"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00055.html"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19344"}, {"source": "secalert@redhat.com", "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00013.html"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ACZVNMIFQGGXNJPMHAVBN3H2U65FXQY/"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GQ6U65I2K23YJC4FESW477WL55TU3PPT/"}, {"source": "secalert@redhat.com", "url": "https://security.gentoo.org/glsa/202003-52"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20200122-0001/"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4244-1/"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://www.samba.org/samba/security/CVE-2019-19344.html"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://www.synology.com/security/advisory/Synology_SA_20_01"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00055.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19344"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00013.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": 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"https://www.synology.com/security/advisory/Synology_SA_20_01"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Christian Naumer as the original reporter.", "bugzilla": {"description": "samba: Use after free during DNS zone scavenging in Samba AD DC", "id": "1791204", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1791204"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["There is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x versions before 4.11.5, essentially due to a call to realloc() while other local variables still point at the original buffer.", "A flaw was found in samba. An off-by-default feature to tombstone dynamically created DNS records once they have reached their expiry time contains a use-after-free flaw that allows read memory to be saved back into the database. The highest threat from this vulnerability is to system availability."], "mitigation": {"lang": "en:us", "value": "The code in question is not run in the default configuration, so the workaround is simply to not set\ndns zone scavenging = yes"}, "name": "CVE-2019-19344", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "samba4", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:storage:3", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Storage 3"}, {"cpe": "cpe:/o:redhat:rhev_hypervisor:4", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Virtualization 4"}], "public_date": "2020-01-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-19344\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-19344\nhttps://www.samba.org/samba/security/CVE-2019-19344.html"], "statement": "This flaw does not affect the version of samba shipped with Red Hat Enterprise Linux because there is no support for samba as Active Directory Domain Controller.", "threat_severity": "Moderate"}

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