Discovery API Icon
Discovery API
Security Advisory Icon
Security Advisory
Alpaquita LinuxStreamSecurity Advisory
Search Cve

CVE-2019-14870

Published: August 31, 2023Last modified: August 31, 2023

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.

Severity score breakdown

ParameterValue
Base score5.4
Attack VectorNETWORK
Attack complexityLOW
Privileges requiredLOW
User interactionNONE
ScopeUNCHANGED
ConfidentialityLOW
Integrity impactLOW
Availability impactNONE
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Status

ProductReleasePackageStatus
Alpaquita Linux23 LTSheimdalNot affected (7.8.0-r1)
StreamheimdalNot affected (7.8.0-r3)

References

ON THIS PAGE