Ubuntu Security Update USN-3353-2: Samba vulnerability

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Ubuntu Security Notice USN-3353-2


14th July, 2017

samba vulnerability


A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 17.04
• Ubuntu 16.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary


Samba could allow unintended access to network services.

Software description

• 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.

Update instructions


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

Ubuntu 17.04:
samba-libs 2:4.5.8+dfsg-0ubuntu0.17.04.4
Ubuntu 16.10:
samba-libs 2:4.4.5+dfsg-2ubuntu5.8
Ubuntu 16.04 LTS:
samba-libs 2:4.3.11+dfsg-0ubuntu0.16.04.9
Ubuntu 14.04 LTS:
samba-libs 2:4.3.11+dfsg-0ubuntu0.14.04.10

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References


CVE-2017-11103

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