{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2023-4091", "ASSIGNER": "secalert@redhat.com", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module \"acl_xattr\" is configured with \"acl_xattr:ignore system acls = yes\". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "Incorrect Default Permissions", "cweId": "CWE-276" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Red Hat", "product": { "product_data": [ { "product_name": "Red Hat Enterprise Linux 8", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:4.18.6-2.el8_9", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:4.18.6-2.el8_9", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:4.15.5-13.el8_6", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:4.17.5-4.el8_8", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Enterprise Linux 9", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:4.18.6-101.el9_3", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:4.18.6-101.el9_3", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Enterprise Linux 9.0 Extended Update Support", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:4.15.5-111.el9_0", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:4.17.5-104.el9_2", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "0:4.15.5-13.el8_6", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Enterprise Linux 6", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "unknown" } }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "unknown" } } ] } }, { "product_name": "Red Hat Enterprise Linux 7", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "unknown" } } ] } }, { "product_name": "Red Hat Storage 3", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://access.redhat.com/errata/RHSA-2023:6209", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:6209" }, { "url": "https://access.redhat.com/errata/RHSA-2023:6744", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:6744" }, { "url": "https://access.redhat.com/errata/RHSA-2023:7371", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:7371" }, { "url": "https://access.redhat.com/errata/RHSA-2023:7408", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:7408" }, { "url": "https://access.redhat.com/errata/RHSA-2023:7464", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:7464" }, { "url": "https://access.redhat.com/errata/RHSA-2023:7467", "refsource": "MISC", "name": "https://access.redhat.com/errata/RHSA-2023:7467" }, { "url": "https://access.redhat.com/security/cve/CVE-2023-4091", "refsource": "MISC", "name": "https://access.redhat.com/security/cve/CVE-2023-4091" }, { "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2241882", "refsource": "MISC", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2241882" }, { "url": "https://bugzilla.samba.org/show_bug.cgi?id=15439", "refsource": "MISC", "name": "https://bugzilla.samba.org/show_bug.cgi?id=15439" }, { "url": "https://www.samba.org/samba/security/CVE-2023-4091.html", "refsource": "MISC", "name": "https://www.samba.org/samba/security/CVE-2023-4091.html" } ] }, "work_around": [ { "lang": "en", "value": "The vulnerability is most commonly associated with the \"acl_xattr\" module and can be mitigated by setting:\n~~~\n\"acl_xattr:ignore system acls = no\"\n~~~" } ], "impact": { "cvss": [ { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "version": "3.1" } ] } }