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CVE-2018-16851

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.

Impact

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.

Affected products

VendorProductAffected versions
SambaSamba
from 4.0.0 before 4.7.12
from 4.8.0 before 4.8.7
from 4.9.0 before 4.9.3
CanonicalUbuntu Linux
Versions 12.04, 14.04, 16.04, 18.04, 18.10
DebianDebian Linux
Versions 8.0, 9.0

Weakness classification

CWE-476

References