CVE-2018-16851
6.5
MEDIUM
CVSS 3.1
EPSS 8.9%
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.
How to fix CVE-2018-16851
To remediate CVE-2018-16851, upgrade the affected package to a fixed version below.
- —upgrade to 4.8.7-r0 or later
- —upgrade to 2:4.9.2+dfsg-2 or later
Is CVE-2018-16851 being exploited?
Moderate — EPSS is 8.9%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (2)
- from 0, < 4.8.7-r0
- from 0, < 2:4.9.2+dfsg-2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |