NULL Pointer Dereference Affecting samba package, versions <2:4.3.11+dfsg-0ubuntu0.16.04.18


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1.25% (86th percentile)

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  • Snyk IDSNYK-UBUNTU1604-SAMBA-357106
  • published2 Dec 2018
  • disclosed28 Nov 2018

Introduced: 28 Nov 2018

CVE-2018-16851  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 samba to version 2:4.3.11+dfsg-0ubuntu0.16.04.18 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba package and not the samba package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

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.

CVSS Scores

version 3.1