NVD

CVE-2018-16851 Detail

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 6.5 MEDIUM

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Nist CVSS score does not match with CNA score

CNA: Red Hat, Inc.

Base Score: 6.5 MEDIUM

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 4.0 MEDIUM

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

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://www.securityfocus.com/bid/106027	Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851	Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202003-52	Third Party Advisory
https://security.netapp.com/advisory/ntap-20181127-0001/	Third Party Advisory
https://usn.ubuntu.com/3827-1/	Third Party Advisory
https://usn.ubuntu.com/3827-2/	Third Party Advisory
https://www.debian.org/security/2018/dsa-4345	Third Party Advisory
https://www.samba.org/samba/security/CVE-2018-16851.html	Patch Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-476	NULL Pointer Dereference	NIST Red Hat, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

7 change records found show changes

Modified Analysis by NIST 8/29/2022 4:03:55 PM

Action	Type	Old Value	New Value
Changed	CPE Configuration	OR cpe:2.3:a:samba:samba::::::::* versions from (including) 4.0.0 up to (excluding) 4.7.12 cpe:2.3:a:samba:samba::::::::* versions from (including) 4.8.0 up to (excluding) 4.8.7 cpe:2.3:a:samba:samba::::::::* versions from (including) 4.8.8 up to (excluding) 4.9.3	OR cpe:2.3:a:samba:samba::::::::* versions from (including) 4.0.0 up to (excluding) 4.7.12 cpe:2.3:a:samba:samba::::::::* versions from (including) 4.8.0 up to (excluding) 4.8.7 cpe:2.3:a:samba:samba::::::::* versions from (including) 4.9.0 up to (excluding) 4.9.3
Removed	CVSS V3	NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CVSS V3.1		NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Changed	Reference Type	https://security.gentoo.org/glsa/202003-52 No Types Assigned	https://security.gentoo.org/glsa/202003-52 Third Party Advisory

Initial Analysis by NIST 2/04/2019 3:11:17 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR cpe:2.3:a:samba:samba::::::::* versions from (including) 4.0.0 up to (excluding) 4.7.12 cpe:2.3:a:samba:samba::::::::* versions from (including) 4.8.0 up to (excluding) 4.8.7 cpe:2.3:a:samba:samba::::::::* versions from (including) 4.8.8 up to (excluding) 4.9.3
Added	CPE Configuration		OR cpe:2.3:o:canonical:ubuntu_linux:12.04::::esm:::* cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::* cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::* cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::* cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::
Added	CPE Configuration		OR cpe:2.3:o:debian:debian_linux:8.0::::::: cpe:2.3:o:debian:debian_linux:9.0:::::::
Added	CVSS V2		(AV:N/AC:L/Au:S/C:N/I:N/A:P)
Added	CVSS V3		AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CWE		CWE-476
Changed	Reference Type	http://www.securityfocus.com/bid/106027 No Types Assigned	http://www.securityfocus.com/bid/106027 Third Party Advisory, VDB Entry
Changed	Reference Type	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851 No Types Assigned	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851 Issue Tracking, Third Party Advisory
Changed	Reference Type	https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html No Types Assigned	https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html Mailing List, Third Party Advisory
Changed	Reference Type	https://security.netapp.com/advisory/ntap-20181127-0001/ No Types Assigned	https://security.netapp.com/advisory/ntap-20181127-0001/ Third Party Advisory
Changed	Reference Type	https://usn.ubuntu.com/3827-1/ No Types Assigned	https://usn.ubuntu.com/3827-1/ Third Party Advisory
Changed	Reference Type	https://usn.ubuntu.com/3827-2/ No Types Assigned	https://usn.ubuntu.com/3827-2/ Third Party Advisory
Changed	Reference Type	https://www.debian.org/security/2018/dsa-4345 No Types Assigned	https://www.debian.org/security/2018/dsa-4345 Third Party Advisory
Changed	Reference Type	https://www.samba.org/samba/security/CVE-2018-16851.html No Types Assigned	https://www.samba.org/samba/security/CVE-2018-16851.html Patch, Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2018-16851
NVD Published Date:
11/28/2018
NVD Last Modified:
08/29/2022
Source:
Red Hat, Inc.

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National Vulnerability Database

National Vulnerability Database

CVE-2018-16851 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by Red Hat, Inc. 5/14/2024 1:06:09 AM

Modified Analysis by NIST 8/29/2022 4:03:55 PM

CVE Modified by Red Hat, Inc. 3/25/2020 3:15:14 PM

CVE Modified by Red Hat, Inc. 10/09/2019 7:36:21 PM

Initial Analysis by NIST 2/04/2019 3:11:17 PM

CVE Modified by Red Hat, Inc. 12/16/2018 6:29:03 AM

CVE Modified by Red Hat, Inc. 11/29/2018 6:29:04 AM

Quick Info