CVE-2019-14870
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…
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | Medium5.4 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 2.7% · top 14% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.
Weakness
Affected products
References (14)
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870 (opens in a new tab)x_transferred
- USN-4217-1 (opens in a new tab)vendor-advisoryx_transferred
- https://security.netapp.com/advisory/ntap-20191210-0002/ (opens in a new tab)x_transferred
- https://www.samba.org/samba/security/CVE-2019-14870.html (opens in a new tab)x_transferred
- USN-4217-2 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2019-be98a08835 (opens in a new tab)vendor-advisoryx_transferred
- https://www.synology.com/security/advisory/Synology_SA_19_40 (opens in a new tab)x_transferred
- openSUSE-SU-2019:2700 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2019-11dddb785b (opens in a new tab)vendor-advisoryx_transferred
- GLSA-202003-52 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20210529 [SECURITY] [DLA 2668-1] samba security update (opens in a new tab)mailing-listx_transferred
- [debian-lts-announce] 20221126 [SECURITY] [DLA 3206-1] heimdal security update (opens in a new tab)mailing-listx_transferred
- https://security.netapp.com/advisory/ntap-20230216-0008/ (opens in a new tab)x_transferred
- GLSA-202310-06 (opens in a new tab)vendor-advisoryx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-14870)Record last updated .