CVE-2023-4091

CVSS V2 None CVSS V3 None
Description
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.
Overview
  • CVE ID
  • CVE-2023-4091
  • Assigner
  • redhat
  • Vulnerability Status
  • PUBLISHED
  • Published Version
  • 2023-11-03T07:56:35.611Z
  • Last Modified Date
  • 2024-06-04T17:27:11.711Z
Weakness Enumerations
CWE URL
CWE-276 http://cwe.mitre.org/data/definitions/276.html
References
Reference URL Reference Tags
https://access.redhat.com/errata/RHSA-2023:6209 vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:6744 vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7371 vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7408 vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7464 vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7467 vendor-advisory x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2023-4091 vdb-entry x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2241882 issue-tracking x_refsource_REDHAT
https://bugzilla.samba.org/show_bug.cgi?id=15439
https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/
https://security.netapp.com/advisory/ntap-20231124-0002/
https://www.samba.org/samba/security/CVE-2023-4091.html
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2023-4091
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4091
History
Created Old Value New Value Data Type Notes
2024-06-24 19:52:46 Added to TrackCVE