CVE-2018-16860

MEDIUM

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.

References

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://www.samba.org/samba/security/CVE-2018-16860.html

Details

Source: MITRE

Published: 2019-07-31

Updated: 2019-08-14

Type: CWE-358

Risk Information

CVSS v2.0

Base Score: 6

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

Impact Score: 6.4

Exploitability Score: 6.8

Severity: MEDIUM

CVSS v3.0

Base Score: 7.5

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

Impact Score: 5.9

Exploitability Score: 1.6

Severity: HIGH