A flaw was found in the way samba before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication even when NTLMv1 was explicitly disabled. A man-in-the-middle attacker could use this flaw to read the credential and other details passed between the samba server and client.
http://www.securityfocus.com/bid/105084
https://access.redhat.com/errata/RHSA-2018:2612
https://access.redhat.com/errata/RHSA-2018:2613
https://access.redhat.com/errata/RHSA-2018:3056
https://access.redhat.com/security/cve/cve-2018-1139
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1139
https://security.netapp.com/advisory/ntap-20180814-0001/
Source: MITRE
Published: 2018-08-22
Updated: 2019-10-09
Type: CWE-522
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 8.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.2
Severity: HIGH