vulnerability
Samba CVE-2018-16851: NULL pointer de-reference in Samba AD DC LDAP server
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:L/Au:S/C:N/I:N/A:P) | Nov 28, 2018 | Dec 4, 2018 | Aug 11, 2025 |
Severity
4
CVSS
(AV:N/AC:L/Au:S/C:N/I:N/A:P)
Published
Nov 28, 2018
Added
Dec 4, 2018
Modified
Aug 11, 2025
Description
Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the client, the entries are cached in a single memory object with a maximum size of 256MB. When this size is reached, the Samba process providing the LDAP service will follow the NULL pointer, terminating the process. There is no further vulnerability associated with this issue, merely a denial of service.
Solutions
samba-upgrade-4_7_12samba-upgrade-4_8_7samba-upgrade-4_9_3
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