Vulnerability CVE-2019-14870: Information

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: MEDIUM (5.4) Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

URL: https://nvd.nist.gov/vuln/detail/CVE-2019-14870
Published: Dec. 11, 2019
Modified: Nov. 7, 2023
Error type identifier: CWE-287

Fixed packages

Package name
Branch
Fixed in version
Version from repository
Errata ID
Task #
State
sambasisyphus4.10.11-alt14.20.1-alt2ALT-PU-2019-3315-1242980Fixed
sambap104.10.11-alt14.19.6-alt2ALT-PU-2019-3315-1242980Fixed
sambap94.10.11-alt14.14.10-alt2ALT-PU-2019-3404-1242985Fixed
sambap84.9.17-alt14.9.18-alt1ALT-PU-2019-3323-1242978Fixed
sambac10f14.10.11-alt14.16.11-alt2ALT-PU-2019-3315-1242980Fixed
sambac9f24.10.11-alt14.14.14-alt0.c9.1ALT-PU-2019-3404-1242985Fixed
sambap114.10.11-alt14.20.1-alt1ALT-PU-2019-3315-1242980Fixed
samba-DCp84.9.17-alt14.9.18-alt1ALT-PU-2019-3324-1242978Fixed

References to Advisories, Solutions, and Tools

Hyperlink
Resource
https://www.samba.org/samba/security/CVE-2019-14870.html
  • Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870
  • Issue Tracking
  • Third Party Advisory
https://security.netapp.com/advisory/ntap-20191210-0002/
  • Third Party Advisory
USN-4217-1
  • Third Party Advisory
USN-4217-2
  • Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_19_40
  • Third Party Advisory
openSUSE-SU-2019:2700
  • Mailing List
  • Third Party Advisory
GLSA-202003-52
  • Third Party Advisory
[debian-lts-announce] 20210529 [SECURITY] [DLA 2668-1] samba security update
  • Mailing List
  • Third Party Advisory
[debian-lts-announce] 20221126 [SECURITY] [DLA 3206-1] heimdal security update
  • Mailing List
  • Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0008/
    GLSA-202310-06
      FEDORA-2019-be98a08835
        FEDORA-2019-11dddb785b

            1. Configuration 1

              cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
              Start including
              4.10.0
              End excliding
              4.10.11
              cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
              Start including
              4.11.0
              End excliding
              4.11.3
              cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
              Start including
              4.0.0
              End excliding
              4.9.17

              Configuration 2

              cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
              cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

              Configuration 3

              cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
              cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
              cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
              cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
              cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*

              Configuration 4

              cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
              cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

              Configuration 5

              cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
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