National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-14870 Detail

Current Description

All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the not-delegated flag set.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 5.4 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Nist CVSS score does not match with CNA score
CNA:  Red Hat, Inc.
Base Score: 5.4 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870 Issue Tracking Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE/
https://security.netapp.com/advisory/ntap-20191210-0002/ Third Party Advisory
https://usn.ubuntu.com/4217-1/ Third Party Advisory
https://usn.ubuntu.com/4217-2/ Third Party Advisory
https://www.samba.org/samba/security/CVE-2019-14870.html Vendor Advisory
https://www.synology.com/security/advisory/Synology_SA_19_40 Third Party Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-287 Improper Authentication NIST  
CWE-285 Improper Authorization Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
4.0.0
Up to (excluding)
4.9.17
 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
4.10.0
Up to (excluding)
4.10.11
 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
4.11.0
Up to (excluding)
4.11.3

Configuration 2 ( hide )
 cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 3 ( hide )
 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

6 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-14870
NVD Published Date:
12/10/2019
NVD Last Modified:
12/23/2019