Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-3353-2: Samba vulnerability

14 July 2017

Samba could allow unintended access to network services.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

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

Details

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

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 servers or perform other attacks.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 17.04
Ubuntu 16.10
Ubuntu 16.04
Ubuntu 14.04

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

References

Related notices

  • USN-3353-4: samba, libsmbclient
  • USN-3353-1: heimdal-kcm, libwind0-heimdal, libkadm5srv8-heimdal, heimdal-dev, heimdal-docs, libroken18-heimdal, heimdal-servers, libhcrypto4-heimdal, libkafs0-heimdal, libheimntlm0-heimdal, heimdal-multidev, libhx509-5-heimdal, libkadm5clnt7-heimdal, libkrb5-26-heimdal, libsl0-heimdal, libhdb9-heimdal, heimdal-kdc, libotp0-heimdal, heimdal, libkdc2-heimdal, libgssapi3-heimdal, libheimbase1-heimdal, heimdal-servers-x, heimdal-clients, libasn1-8-heimdal, heimdal-clients-x
  • USN-3353-3: heimdal, libkrb5-26-heimdal