Improper Authentication Affecting libsamba-util0-32bit package, versions <4.9.5+git.224.86a8e66adea-3.18.1
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Test your applications- Snyk ID SNYK-SLES151-LIBSAMBAUTIL032BIT-2723166
- published 14 Apr 2022
- disclosed 17 Dec 2019
Introduced: 17 Dec 2019
CVE-2019-14870 Open this link in a new tabHow to fix?
Upgrade SLES:15.1 libsamba-util0-32bit to version 4.9.5+git.224.86a8e66adea-3.18.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libsamba-util0-32bit package and not the libsamba-util0-32bit package as distributed by SLES.
See How to fix? for SLES:15.1 relevant fixed versions and status.
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.
References
- https://www.suse.com/security/cve/CVE-2019-14870.html
- https://bugzilla.suse.com/1158109
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870
- https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE/
- https://security.gentoo.org/glsa/202003-52
- https://security.netapp.com/advisory/ntap-20191210-0002/
- https://security.netapp.com/advisory/ntap-20230216-0008/
- https://usn.ubuntu.com/4217-1/
- https://usn.ubuntu.com/4217-2/
- https://www.samba.org/samba/security/CVE-2019-14870.html
- https://www.synology.com/security/advisory/Synology_SA_19_40
- https://security.gentoo.org/glsa/202310-06
- 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/