gsd-2023-4091
Vulnerability from gsd
Modified
2023-12-13 01:20
Details
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.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2023-4091",
"id": "GSD-2023-4091"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2023-4091"
],
"details": "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\u0027s permissions.",
"id": "GSD-2023-4091",
"modified": "2023-12-13T01:20:26.766955Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2023-4091",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Red Hat Enterprise Linux 8",
"version": {
"version_data": [
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"defaultStatus": "affected",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.18.6-2.el8_9",
"versionType": "rpm"
}
]
}
},
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"defaultStatus": "affected",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.18.6-2.el8_9",
"versionType": "rpm"
}
]
}
}
]
}
},
{
"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": {
"defaultStatus": "affected",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.15.5-13.el8_6",
"versionType": "rpm"
}
]
}
}
]
}
},
{
"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": {
"defaultStatus": "affected",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.17.5-4.el8_8",
"versionType": "rpm"
}
]
}
}
]
}
},
{
"product_name": "Red Hat Enterprise Linux 9",
"version": {
"version_data": [
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"defaultStatus": "affected",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.18.6-101.el9_3",
"versionType": "rpm"
}
]
}
},
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"defaultStatus": "affected",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.18.6-101.el9_3",
"versionType": "rpm"
}
]
}
}
]
}
},
{
"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": {
"defaultStatus": "affected",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.15.5-111.el9_0",
"versionType": "rpm"
}
]
}
}
]
}
},
{
"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": {
"defaultStatus": "affected",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.17.5-104.el9_2",
"versionType": "rpm"
}
]
}
}
]
}
},
{
"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": {
"defaultStatus": "affected",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.15.5-13.el8_6",
"versionType": "rpm"
}
]
}
}
]
}
},
{
"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"
}
}
]
}
}
]
},
"vendor_name": "Red Hat"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"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\u0027s permissions."
}
]
},
"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"
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"cweId": "CWE-276",
"lang": "eng",
"value": "Incorrect Default Permissions"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://access.redhat.com/errata/RHSA-2023:6209",
"refsource": "MISC",
"url": "https://access.redhat.com/errata/RHSA-2023:6209"
},
{
"name": "https://access.redhat.com/errata/RHSA-2023:6744",
"refsource": "MISC",
"url": "https://access.redhat.com/errata/RHSA-2023:6744"
},
{
"name": "https://access.redhat.com/errata/RHSA-2023:7371",
"refsource": "MISC",
"url": "https://access.redhat.com/errata/RHSA-2023:7371"
},
{
"name": "https://access.redhat.com/errata/RHSA-2023:7408",
"refsource": "MISC",
"url": "https://access.redhat.com/errata/RHSA-2023:7408"
},
{
"name": "https://access.redhat.com/errata/RHSA-2023:7464",
"refsource": "MISC",
"url": "https://access.redhat.com/errata/RHSA-2023:7464"
},
{
"name": "https://access.redhat.com/errata/RHSA-2023:7467",
"refsource": "MISC",
"url": "https://access.redhat.com/errata/RHSA-2023:7467"
},
{
"name": "https://access.redhat.com/security/cve/CVE-2023-4091",
"refsource": "MISC",
"url": "https://access.redhat.com/security/cve/CVE-2023-4091"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=2241882",
"refsource": "MISC",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2241882"
},
{
"name": "https://bugzilla.samba.org/show_bug.cgi?id=15439",
"refsource": "MISC",
"url": "https://bugzilla.samba.org/show_bug.cgi?id=15439"
},
{
"name": "https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html",
"refsource": "MISC",
"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html"
},
{
"name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/",
"refsource": "MISC",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/"
},
{
"name": "https://security.netapp.com/advisory/ntap-20231124-0002/",
"refsource": "MISC",
"url": "https://security.netapp.com/advisory/ntap-20231124-0002/"
},
{
"name": "https://www.samba.org/samba/security/CVE-2023-4091.html",
"refsource": "MISC",
"url": "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~~~"
}
]
},
"nvd.nist.gov": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1C9913F9-D46D-4CE3-AA78-E50D32779971",
"versionEndExcluding": "4.17.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"matchCriteriaId": "8A33312F-1523-4647-83DA-6DD6231906F9",
"versionEndExcluding": "4.18.8",
"versionStartIncluding": "4.18.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"matchCriteriaId": "DE496104-DDB5-4709-8026-C83E99B0C865",
"versionEndExcluding": "4.19.1",
"versionStartIncluding": "4.19.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*",
"matchCriteriaId": "B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"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",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"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\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."
}
],
"id": "CVE-2023-4091",
"lastModified": "2024-04-22T16:15:13.120",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"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"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"cvssData": {
"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"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "secalert@redhat.com",
"type": "Secondary"
}
]
},
"published": "2023-11-03T08:15:08.197",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"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",
"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",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/security/cve/CVE-2023-4091"
},
{
"source": "secalert@redhat.com",
"tags": [
"Issue Tracking"
],
"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",
"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/"
},
{
"source": "secalert@redhat.com",
"url": "https://security.netapp.com/advisory/ntap-20231124-0002/"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "https://www.samba.org/samba/security/CVE-2023-4091.html"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "secalert@redhat.com",
"type": "Secondary"
}
]
}
}
}
}
Loading...
Loading...
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.