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Vulnerability record · CVE-2018-16860 · published 31 July 2019

CVE-2018-16860: Samba vulnerability

Samba · Samba

A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.

7.5 CVSS 3.0 High EPSS 2.5% · top 16.0% CWE-358 · CWE-358
7.5CVSS 3.0 base score, v2 6.0
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
34References
17 Jun 2026Last modified by NVD

Description

A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.

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

Affected products

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

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html
http://seclists.org/fulldisclosure/2019/Aug/11
http://seclists.org/fulldisclosure/2019/Aug/13
http://seclists.org/fulldisclosure/2019/Aug/14
http://seclists.org/fulldisclosure/2019/Aug/15
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16860 Issue TrackingThird Party Advisory
https://seclists.org/bugtraq/2019/Aug/21
https://seclists.org/bugtraq/2019/Aug/22
https://seclists.org/bugtraq/2019/Aug/23
https://seclists.org/bugtraq/2019/Aug/25
https://security.gentoo.org/glsa/202003-52
https://support.apple.com/HT210346
https://support.apple.com/HT210348
https://support.apple.com/HT210351
https://support.apple.com/HT210353
https://www.samba.org/samba/security/CVE-2018-16860.html MitigationVendor Advisory
https://www.synology.com/security/advisory/Synology_SA_19_23
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html
http://seclists.org/fulldisclosure/2019/Aug/11
http://seclists.org/fulldisclosure/2019/Aug/13
http://seclists.org/fulldisclosure/2019/Aug/14
http://seclists.org/fulldisclosure/2019/Aug/15
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16860 Issue TrackingThird Party Advisory
https://seclists.org/bugtraq/2019/Aug/21
https://seclists.org/bugtraq/2019/Aug/22
https://seclists.org/bugtraq/2019/Aug/23
https://seclists.org/bugtraq/2019/Aug/25
https://security.gentoo.org/glsa/202003-52
https://support.apple.com/HT210346
https://support.apple.com/HT210348
https://support.apple.com/HT210351
https://support.apple.com/HT210353
https://www.samba.org/samba/security/CVE-2018-16860.html MitigationVendor Advisory
https://www.synology.com/security/advisory/Synology_SA_19_23

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Source: NIST National Vulnerability Database (record CVE-2018-16860), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.