CVE-2023-4091

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Summary

CVECVE-2023-4091
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-11-03 08:15:00 UTC
Updated2023-11-13 17:52:00 UTC
DescriptionA 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.

Risk And Classification

Problem Types: CWE-276

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 39 All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux Eus 9.0 All All All
Application Redhat Storage 3.0 All All All
Application Samba Samba All All All All

References

ReferenceSourceLinkTags
2241882 – (CVE-2023-4091) CVE-2023-4091 samba: SMB clients can truncate files with read-only permissions MISC bugzilla.redhat.com
15439 – (CVE-2023-4091) [SECURITY] CVE-2023-4091: Client can truncate file with read-only permissions MISC bugzilla.samba.org
[SECURITY] Fedora 39 Update: samba-4.19.2-1.fc39 - package-announce - Fedora Mailing-Lists MISC lists.fedoraproject.org
Red Hat MISC access.redhat.com
cve-details MISC access.redhat.com
Red Hat access.redhat.com
Samba - Security Announcement Archive MISC www.samba.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 161070 Oracle Enterprise Linux Security Update for samba (ELSA-2023-6744)
  • 161196 Oracle Enterprise Linux Security Update for samba (ELSA-2023-7467)
  • 199820 Ubuntu Security Notification for Samba Vulnerabilities (USN-6425-1)
  • 199907 Ubuntu Security Notification for Samba Vulnerabilities (USN-6425-3)
  • 242260 Red Hat Update for samba (RHSA-2023:6209)
  • 242318 Red Hat Update for samba (RHSA-2023:6744)
  • 242484 Red Hat Update for samba (RHSA-2023:7408)
  • 242507 Red Hat Update for samba (RHSA-2023:7467)
  • 242508 Red Hat Update for samba (RHSA-2023:7464)
  • 284612 Fedora Security Update for samba (FEDORA-2023-7eb8cbf1a5)
  • 284682 Fedora Security Update for samba (FEDORA-2023-fff0c857d6)
  • 285191 Fedora Security Update for samba (FEDORA-2023-8c9251e479)
  • 356630 Amazon Linux Security Advisory for samba : ALAS2023-2023-416
  • 356750 Amazon Linux Security Advisory for samba : ALAS2-2023-2367
  • 356781 Amazon Linux Security Advisory for samba : ALAS-2023-1896
  • 503395 Alpine Linux Security Update for samba
  • 505937 Alpine Linux Security Update for samba
  • 6000310 Debian Security Update for samba (DSA 5525-1)
  • 6000543 Debian Security Update for samba (DSA 5647-1)
  • 673360 EulerOS Security Update for samba (EulerOS-SA-2024-1097)
  • 673397 EulerOS Security Update for samba (EulerOS-SA-2023-3349)
  • 673574 EulerOS Security Update for samba (EulerOS-SA-2023-3286)
  • 673584 EulerOS Security Update for samba (EulerOS-SA-2024-1163)
  • 673680 EulerOS Security Update for samba (EulerOS-SA-2023-3258)
  • 673775 EulerOS Security Update for samba (EulerOS-SA-2024-1073)
  • 673833 EulerOS Security Update for samba (EulerOS-SA-2023-3317)
  • 673964 EulerOS Security Update for samba (EulerOS-SA-2024-1297)
  • 710873 Gentoo Linux Samba Multiple Vulnerabilities (GLSA 202402-28)
  • 755062 SUSE Enterprise Linux Security Update for samba (SUSE-SU-2023:4040-1)
  • 755069 SUSE Enterprise Linux Security Update for samba (SUSE-SU-2023:4046-1)
  • 755081 SUSE Enterprise Linux Security Update for samba (SUSE-SU-2023:4059-1)
  • 755106 SUSE Enterprise Linux Security Update for samba (SUSE-SU-2023:4096-1)
  • 941395 AlmaLinux Security Update for samba (ALSA-2023:6744)
  • 941422 AlmaLinux Security Update for samba (ALSA-2023:7467)
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