CVE-2018-16853 describes a denial-of-service vulnerability in Samba versions 4.7.0 and later, specifically when configured as an Active Directory Domain Controller using the non-default MIT Kerberos build. An authenticated user within the Samba AD domain can crash the KDC. This vulnerability has a CVSS score of 5.9 (Medium), indicating a network-based attack with high impact on availability, but requiring high attack complexity. There is no known active exploitation, public exploit code, or significant community discussion surrounding this CVE. The Samba Team now considers the MIT Kerberos build experimental and will not issue patches for it, instead releasing updates (4.7.12, 4.8.7, 4.9.3) to prevent this configuration unless explicitly enabled.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.7.0, < 4.7.12CPE matchmatch criteria | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | ||
>= 4.8.0, < 4.8.7CPE matchmatch criteria | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | ||
>= 4.9.0, < 4.9.3CPE matchmatch criteria | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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