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
Configurations
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Configuration 2 (hide)
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History
07 Nov 2023, 03:05
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08 Oct 2023, 09:15
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Information
Published : 2019-12-10 23:15
Updated : 2024-02-28 17:28
NVD link : CVE-2019-14870
Mitre link : CVE-2019-14870
CVE.ORG link : CVE-2019-14870
JSON object : View
Products Affected
opensuse
- leap
samba
- samba
debian
- debian_linux
canonical
- ubuntu_linux
fedoraproject
- fedora