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Improper Authentication The advisory has been revoked - it doesn't affect any version of package samba  (opens in a new tab)

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EPSS
2.67% (86th percentile)

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  • Snyk IDSNYK-UBUNTU1204-SAMBA-612573
  • published10 Dec 2019
  • disclosed10 Dec 2019
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Introduced: 10 Dec 2019

CVE-2019-14870  (opens in a new tab)
CWE-287  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:12.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba package and not the samba package as distributed by Ubuntu.

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