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Debian: CVE-2023-4091: samba -- security update

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Debian: CVE-2023-4091: samba -- security update

Severity
7
CVSS
(AV:N/AC:L/Au:S/C:N/I:C/A:N)
Published
10/19/2023
Created
10/20/2023
Added
10/19/2023
Modified
01/30/2025

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.

Solution(s)

  • debian-upgrade-samba

References

  • https://attackerkb.com/topics/cve-2023-4091
  • CVE - 2023-4091
  • DSA-5525-1
  • 查看数 703
  • 已创建
  • 最后回复

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