1. Ubuntu Security Notices
  2. USN-3353-2

USN-3353-2: Samba vulnerability

Publication date

14 July 2017

Overview

Samba could allow unintended access to network services.

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.

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.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
17.04 zesty samba-libs –  2:4.5.8+dfsg-0ubuntu0.17.04.4
16.10 yakkety samba-libs –  2:4.4.5+dfsg-2ubuntu5.8
16.04 xenial samba-libs –  2:4.3.11+dfsg-0ubuntu0.16.04.9
14.04 trusty samba-libs –  2:4.3.11+dfsg-0ubuntu0.14.04.10

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References

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