ghsa-f6jj-3gjw-frjm
Vulnerability from github
Published
2023-11-03 09:32
Modified
2024-04-22 18:30
Severity
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.
{
"affected": [],
"aliases": [
"CVE-2023-4091"
],
"database_specific": {
"cwe_ids": [
"CWE-276"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-11-03T08:15:08Z",
"severity": "MODERATE"
},
"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": "GHSA-f6jj-3gjw-frjm",
"modified": "2024-04-22T18:30:47Z",
"published": "2023-11-03T09:32:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4091"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:6209"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:6744"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:7371"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:7408"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:7464"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:7467"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2023-4091"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2241882"
},
{
"type": "WEB",
"url": "https://bugzilla.samba.org/show_bug.cgi?id=15439"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20231124-0002"
},
{
"type": "WEB",
"url": "https://www.samba.org/samba/security/CVE-2023-4091.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
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