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Vulnerability record · CVE-2016-2125 · published 31 October 2018

CVE-2016-2125: Samba improper authentication vulnerability

Samba · Samba

It was found that Samba before versions 4.5.3, 4.4.8, 4.3.13 always requested forwardable tickets when using Kerberos authentication. A service to which Samba authenticated using Kerberos could subsequently use the ticket to impersonate Samba to other services or domain users.

6.5 CVSS 3.1 Medium EPSS 9.2% · top 4.8% CWE-287 · Improper authenticationCWE-20 · Improper input validation
6.5CVSS 3.1 base score, v2 3.3
9.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

It was found that Samba before versions 4.5.3, 4.4.8, 4.3.13 always requested forwardable tickets when using Kerberos authentication. A service to which Samba authenticated using Kerberos could subsequently use the ticket to impersonate Samba to other services or domain users.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://rhn.redhat.com/errata/RHSA-2017-0494.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0495.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0662.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0744.html Third Party Advisory
http://www.securityfocus.com/bid/94988 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037494 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2017:1265 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2125 Issue TrackingMitigationThird Party Advisory
https://www.samba.org/samba/security/CVE-2016-2125.html MitigationPatchVendor Advisory
http://rhn.redhat.com/errata/RHSA-2017-0494.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0495.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0662.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0744.html Third Party Advisory
http://www.securityfocus.com/bid/94988 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037494 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2017:1265 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2125 Issue TrackingMitigationThird Party Advisory
https://www.samba.org/samba/security/CVE-2016-2125.html MitigationPatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2016-2125), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.