UpHeron
All vulnerabilities

Servers and applications

CVE-2023-4091

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…

Severity
Medium 6.5
Published
3 Nov 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.17.12, 4.18.8, 4.19.1
Sources
NVD

Affected software

SoftwareAffected versions
SambaServers and applications · cpe:a:samba:samba
  • Every version before 4.17.12
  • From 4.18.0 before 4.18.8
  • From 4.19.0 before 4.19.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-4091
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-4091