Rapid7 Vulnerability & Exploit Database

Samba CVE-2018-16851: NULL pointer de-reference in Samba AD DC LDAP server

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Samba CVE-2018-16851: NULL pointer de-reference in Samba AD DC LDAP server

Severity
4
CVSS
(AV:N/AC:L/Au:S/C:N/I:N/A:P)
Published
11/28/2018
Created
03/19/2019
Added
12/04/2018
Modified
02/05/2019

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.

Solution(s)

  • samba-upgrade-4_7_12
  • samba-upgrade-4_8_7
  • samba-upgrade-4_9_3

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