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USN-3976-2: Samba vulnerability

14 May 2019

Samba could allow unintended access to network services.



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


USN-3976-1 fixed a vulnerability in Samba. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly
use this issue to escalate privileges.

Update instructions

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

Ubuntu 14.04
Ubuntu 12.04

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


Related notices

  • USN-3976-1: samba-common-bin, samba-vfs-modules, samba, samba-common, winbind, ctdb, libsmbclient, samba-testsuite, samba-dev, smbclient, python-samba, samba-libs, samba-dsdb-modules, libsmbclient-dev, libpam-winbind, libnss-winbind, registry-tools, libwbclient0, python3-samba, libwbclient-dev, libparse-pidl-perl