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Echo: samba: security update to 2:4.17.12+dfsg-0+deb12u1

medium Tenable Self-Hosted Container Security Plugin ID 459930

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2023-4091)

Solution

Update the samba library and its related packages to version 2:4.17.12+dfsg-0+deb12u1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2023-4091

Plugin Details

Severity: Medium

ID: 459930

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:C/A:N

CVSS Score Source: CVE-2023-4091

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/2/2026

Vulnerability Publication Date: 10/10/2023

Reference Information

CVE: CVE-2023-4091

IAVA: 2023-A-0535-S