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USN-3353-4: Samba vulnerability

24 July 2017

Samba could allow unintended access to network services.



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


USN-3353-1 fixed a vulnerability in Heimdal. This update provides the corresponding update for Samba.

Original advisory details:

Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered
that Samba clients incorrectly trusted unauthenticated portions
of Kerberos tickets. A remote attacker could use this to impersonate
trusted network services or perform other attacks.

Update instructions

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

Ubuntu 12.04

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


Related notices

  • USN-3353-1: libheimntlm0-heimdal, libheimbase1-heimdal, libhx509-5-heimdal, libkafs0-heimdal, heimdal-kdc, libotp0-heimdal, libasn1-8-heimdal, heimdal-dev, heimdal-servers-x, heimdal-clients, heimdal, libkadm5srv8-heimdal, heimdal-clients-x, heimdal-kcm, libgssapi3-heimdal, libroken18-heimdal, heimdal-multidev, heimdal-docs, libwind0-heimdal, libkadm5clnt7-heimdal, libhdb9-heimdal, libkrb5-26-heimdal, libhcrypto4-heimdal, heimdal-servers, libsl0-heimdal, libkdc2-heimdal
  • USN-3353-3: libkrb5-26-heimdal, heimdal
  • USN-3353-2: libsmbsharemodes-dev, libsmbsharemodes0, smbclient, registry-tools, samba-common, samba-dev, winbind, samba-dsdb-modules, samba-doc, libsmbclient, samba-libs, samba-testsuite, libwbclient-dev, libsmbclient-dev, libnss-winbind, samba, libwbclient0, ctdb, libpam-winbind, libparse-pidl-perl, samba-vfs-modules, samba-common-bin, libpam-smbpass, python-samba