cve-2023-4091
Vulnerability from cvelistv5
Published
2023-11-03 07:56
Modified
2024-09-16 14:31
Severity
Summary
Samba: smb clients can truncate files with read-only permissions
Show details on NVD website


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The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba\u0027s permissions.\"},{\"lang\":\"es\",\"value\":\"Se descubri\u00f3 una vulnerabilidad en Samba, donde la falla permite a los clientes SMB truncar archivos, incluso con permisos de solo lectura cuando el m\u00f3dulo Samba VFS \\\"acl_xattr\\\" est\u00e1 configurado con \\\"acl_xattr:ignore system acls = yes\\\". El protocolo SMB permite abrir archivos cuando el cliente solicita acceso de solo lectura, pero luego trunca impl\u00edcitamente el archivo abierto a 0 bytes si el cliente especifica una solicitud de disposici\u00f3n de creaci\u00f3n de SOBRESCRITURA separada. El problema surge en configuraciones que omiten las comprobaciones de permisos del sistema de archivos del kernel y dependen \u00fanicamente de los permisos de Samba.\"}],\"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:H/A:N\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6},{\"source\":\"secalert@redhat.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-276\"}]},{\"source\":\"secalert@redhat.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-276\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.17.12\",\"matchCriteriaId\":\"1C9913F9-D46D-4CE3-AA78-E50D32779971\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.18.0\",\"versionEndExcluding\":\"4.18.8\",\"matchCriteriaId\":\"8A33312F-1523-4647-83DA-6DD6231906F9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.0\",\"versionEndExcluding\":\"4.19.1\",\"matchCriteriaId\":\"DE496104-DDB5-4709-8026-C83E99B0C865\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"379A5883-F6DF-41F5-9403-8D17F6605737\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F4CFF558-3C47-480D-A2F0-BABF26042943\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DDA3E5A-8754-4C48-9A27-E2415F8A6000\"}]}]}],\"references\":[{\"url\":\"https://access.redhat.com/errata/RHSA-2023:6209\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2023:6744\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2023:7371\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2023:7408\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2023:7464\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2023:7467\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://access.redhat.com/security/cve/CVE-2023-4091\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2241882\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://bugzilla.samba.org/show_bug.cgi?id=15439\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://www.samba.org/samba/security/CVE-2023-4091.html\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Vendor Advisory\"]}]}}"
  }
}


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