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…
- 5.4MediumCVSS base score
- 2.7%Exploitation in 30 daysEPSS · top 14% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
- 4 months later
· 4 months later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
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 (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.
Affected products
References
References14
- 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)
- EUVD EUVD-2019-5985 (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://cveledger.app/cve/CVE-2019-14870)Record last updated .