CVE-2018-16851

MEDIUM

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.

References

http://www.securityfocus.com/bid/106027

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851

https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html

https://security.netapp.com/advisory/ntap-20181127-0001/

https://usn.ubuntu.com/3827-1/

https://usn.ubuntu.com/3827-2/

https://www.debian.org/security/2018/dsa-4345

https://www.samba.org/samba/security/CVE-2018-16851.html

Details

Source: MITRE

Published: 2018-11-28

Updated: 2019-02-04

Type: CWE-476

Risk Information

CVSS v2.0

Base Score: 4

Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8

Severity: MEDIUM

CVSS v3.0

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM