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Vulnerability details: VCID-7y76-qxnz-4baw
Vulnerability ID VCID-7y76-qxnz-4baw
Aliases CVE-2019-14870
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 5.8
Risk 2.9
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-285 Improper Authorization
CWE-287 Improper Authentication
System Score Found at
cvssv3 5.4 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-14870.json
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
epss 0.02491 https://api.first.org/data/v1/epss?cve=CVE-2019-14870
cvssv3.1 5.4 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.4 https://nvd.nist.gov/vuln/detail/CVE-2019-14870
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2019-14870
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-14870.json
https://api.first.org/data/v1/epss?cve=CVE-2019-14870
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14870
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14870
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.samba.org/samba/security/CVE-2019-14870.html
1778589 https://bugzilla.redhat.com/show_bug.cgi?id=1778589
946786 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=946786
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
CVE-2019-14870 https://nvd.nist.gov/vuln/detail/CVE-2019-14870
USN-4217-1 https://usn.ubuntu.com/4217-1/
USN-4217-2 https://usn.ubuntu.com/4217-2/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-14870.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-14870
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-14870
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.84704
EPSS Score 0.02491
Published At Aug. 7, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:32:07.150475+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.19/main.json 37.0.0