A vulnerability was discovered in Samba, where the flaw...
Moderate severity
Unreviewed
Published
Nov 3, 2023
to the GitHub Advisory Database
•
Updated May 2, 2024
Description
Published by the National Vulnerability Database
Nov 3, 2023
Published to the GitHub Advisory Database
Nov 3, 2023
Last updated
May 2, 2024
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.
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