Samba 4.x < 4.8.12 / 4.9.x < 4.9.8 / 4.10.x < 4.10.3 Man in the Middle Vulnerability (CVE-2018-16860)

high Nessus Plugin ID 125388


The remote Samba server is potentially affected by a man in the middle vulnerability.


The version of Samba running on the remote host is 4.x prior to 4.8.12, 4.9.x prior to 4.9.8 or 4.10.x prior to 4.10.3. It is, therefore, affected by a man in the middle vulnerability in the Heimdal KDC due to an design error. An authenticated, remote attacker can exploit this, via replacing the user name on intercepted requests to the KDC, to bypass security restrictions.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Upgrade to Samba version 4.8.12 / 4.9.8 / 4.10.3 or later.

See Also

Plugin Details

Severity: High

ID: 125388

File Name: samba_4_10_3.nasl

Version: 1.4

Type: remote

Family: Misc.

Published: 5/24/2019

Updated: 10/30/2019

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS Score Source: CVE-2018-16860


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/a:samba:samba, p-cpe:/a:heimdal_project:heimdal

Required KB Items: SMB/NativeLanManager, SMB/samba, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 5/14/2019

Vulnerability Publication Date: 9/11/2018

Reference Information

CVE: CVE-2018-16860

BID: 108332