vulnerability
Alpine Linux: CVE-2023-4091: Incorrect Default Permissions
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:L/Au:S/C:N/I:C/A:N) | Nov 3, 2023 | Mar 26, 2024 | Oct 2, 2024 |
Severity
7
CVSS
(AV:N/AC:L/Au:S/C:N/I:C/A:N)
Published
Nov 3, 2023
Added
Mar 26, 2024
Modified
Oct 2, 2024
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
alpine-linux-upgrade-samba
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