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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities
NOTICE UPDATED - May, 29th 2024

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CVE-2023-4091 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://access.redhat.com/errata/RHSA-2023:6209 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2023:6744 Third Party Advisory 
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/errata/RHSA-2023:7467
https://access.redhat.com/security/cve/CVE-2023-4091 Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=2241882 Issue Tracking 
https://bugzilla.samba.org/show_bug.cgi?id=15439 Issue Tracking 
https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/ Mailing List 
https://security.netapp.com/advisory/ntap-20231124-0002/
https://www.samba.org/samba/security/CVE-2023-4091.html Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-276 Incorrect Default Permissions cwe source acceptance level NIST   Red Hat, Inc.  

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Change History

10 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-4091
NVD Published Date:
11/03/2023
NVD Last Modified:
04/22/2024
Source:
Red Hat, Inc.