USN-4217-1: Samba vulnerabilities

Releases

• Ubuntu 19.10
• Ubuntu 19.04
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• samba - SMB/CIFS file, print, and login server for Unix

Details

Andreas Oster discovered that the Samba DNS management server incorrectly
handled certain records. An authenticated attacker could possibly use this
issue to crash Samba, resulting in a denial of service. (CVE-2019-14861)

Isaac Boukris discovered that Samba did not enforce the Kerberos
DelegationNotAllowed feature restriction, contrary to expectations.
(CVE-2019-14870)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.10

• libsmbclient - 2:4.10.7+dfsg-0ubuntu2.3
• samba - 2:4.10.7+dfsg-0ubuntu2.3

Ubuntu 19.04

• libsmbclient - 2:4.10.0+dfsg-0ubuntu2.7
• samba - 2:4.10.0+dfsg-0ubuntu2.7

Ubuntu 18.04

• libsmbclient - 2:4.7.6+dfsg~ubuntu-0ubuntu2.14
• samba - 2:4.7.6+dfsg~ubuntu-0ubuntu2.14

Ubuntu 16.04

• libsmbclient - 2:4.3.11+dfsg-0ubuntu0.16.04.24
• samba - 2:4.3.11+dfsg-0ubuntu0.16.04.24

In general, a standard system update will make all the necessary changes.

References

• CVE-2019-14861
• CVE-2019-14870

Related notices

• USN-4217-2: libnss-winbind, libwbclient0, samba-libs, libpam-smbpass, libpam-winbind, samba-common, samba-vfs-modules, libsmbclient-dev, smbclient, libparse-pidl-perl, samba-common-bin, samba-dsdb-modules, samba-testsuite, winbind, samba-dev, samba-doc, libsmbclient, libwbclient-dev, samba, python-samba, registry-tools, libsmbsharemodes0, libsmbsharemodes-dev