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CVE-2019-14870 Detail

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.


Severity



CVSS 4.0 Severity and Metrics:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html Mailing List  Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870 Issue Tracking  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE/
https://security.gentoo.org/glsa/202003-52 Third Party Advisory 
https://security.gentoo.org/glsa/202310-06
https://security.netapp.com/advisory/ntap-20191210-0002/ Third Party Advisory 
https://security.netapp.com/advisory/ntap-20230216-0008/
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 cwe source acceptance level NIST  
CWE-285 Improper Authorization Provider acceptance level Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

14 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-14870
NVD Published Date:
12/10/2019
NVD Last Modified:
11/06/2023
Source:
Red Hat, Inc.