CVE-2018-16851 is a denial-of-service vulnerability affecting Samba versions 4.0.0 through 4.7.11, 4.8.6, and 4.9.2, specifically impacting its Active Directory Domain Controller (AD DC) LDAP service. An authenticated attacker can trigger a NULL pointer dereference by sending an LDAP search request that causes the LDAP entry cache to exceed 256MB, leading to the termination of the Samba process. This vulnerability has a CVSS score of 6.5 (Medium), indicating it can be exploited remotely with low complexity by a low-privileged attacker, resulting in high availability impact. There is no known active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.0.0, < 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:*:*:*:*:*:*:*:* | ||
12.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* | ||
14.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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