CVE-2023-4091
- Source
- https://cve.org/CVERecord?id=CVE-2023-4091
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-4091.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2023-4091
- Downstream
- Related
- Published
- 2023-11-03T08:15:08.197Z
- Modified
- 2026-03-15T22:47:30.232622Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- 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 "aclxattr" is configured with "aclxattr: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.
- References
-
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/
- https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
- https://www.samba.org/samba/security/CVE-2023-4091.html
- https://security.netapp.com/advisory/ntap-20231124-0002/
- https://access.redhat.com/errata/RHSA-2023:6209
- https://access.redhat.com/errata/RHSA-2023:6744
- https://access.redhat.com/errata/RHSA-2023:7371
- https://access.redhat.com/errata/RHSA-2023:7408
- https://access.redhat.com/errata/RHSA-2023:7464
- https://access.redhat.com/security/cve/CVE-2023-4091
- https://access.redhat.com/errata/RHSA-2023:7467
- https://bugzilla.redhat.com/show_bug.cgi?id=2241882
- https://bugzilla.samba.org/show_bug.cgi?id=15439
Affected packages
Git / github.com/samba-team/samba
Affected ranges
- Type
- GIT
- Repo
- https://github.com/samba-team/samba
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroducedFixedIntroducedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedLast affected
- Database specific
{ "versions": [ { "introduced": "0" }, { "fixed": "4.17.12" }, { "introduced": "4.18.0" }, { "fixed": "4.18.8" }, { "introduced": "4.19.0" }, { "fixed": "4.19.1" }, { "introduced": "0" }, { "last_affected": "3.0" } ] }
Database specific
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "39"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "8.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "9.0"
}
]
}
]
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-4091.json"