CVE-2018-16860 Information

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 Vector

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

Reference

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 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 https://www.synology.com/security/advisory/Synology_SA_19_23

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.5