Attacker Value
Unknown
CVE-2019-14870
CVE-2019-14870
(Last updated November 08, 2023) ▾
MITRE ATT&CK
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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.
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CVSS V3 Severity and Metrics
Data provided by the National Vulnerability Database (NVD)
Base Score:
5.4 Medium
Impact Score:
2.5
Exploitability Score:
2.8
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
Low
Integrity (I):
Low
Availability (A):
None
General Information
Vendors
- canonical,
- debian,
- fedoraproject,
- opensuse,
- samba
Products
- debian linux 10.0,
- debian linux 9.0,
- fedora 30,
- fedora 31,
- leap 15.1,
- samba,
- ubuntu linux 14.04,
- ubuntu linux 16.04,
- ubuntu linux 18.04,
- ubuntu linux 19.04,
- ubuntu linux 19.10
References
Advisory
