ctdb: 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 (...
CVE-2019-14870 is fixed in 17 products on 1 platform, first by ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.14, released December 9, 2019. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ctdb · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| libnss-winbind · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | libnss-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| libpam-winbind · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | libpam-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| libparse-pidl-perl · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | libparse-pidl-perl 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| libsmbclient · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | libsmbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| libwbclient0 · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | libwbclient0 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| python-samba · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | python-samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| registry-tools · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | registry-tools 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| samba · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| samba-common · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | samba-common 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| samba-common-bin · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | samba-common-bin 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| samba-dsdb-modules · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | samba-dsdb-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| samba-libs · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | samba-libs 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| samba-testsuite · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | samba-testsuite 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| samba-vfs-modules · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | samba-vfs-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| smbclient · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | smbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
| winbind · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.14 | Dec 9, 2019 |
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