==========================================================================
Ubuntu Security Notice USN-3595-1
March 13, 2018

samba vulnerabilities
==========================================================================

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

– Ubuntu 17.10
– Ubuntu 16.04 LTS
– Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Samba.

Software Description:
– samba: SMB/CIFS file, print, and login server for Unix

Details:

Björn Baumbach discovered that Samba incorrectly validated permissions when
changing account passwords via LDAP. An authenticated attacker could use this
issue to change the password of other users, including administrators, and
perform actions as those users. (CVE-2018-1057)

It was discovered that Samba incorrectly validated inputs to the RPC spoolss
service. An authenticated attacker could use this issue to cause the service to
crash, resulting in a denial of service. (CVE-2018-1050)

Update instructions:

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

Ubuntu 17.10:
samba 2:4.6.7+dfsg-1ubuntu3.2
samba-dsdb-modules 2:4.6.7+dfsg-1ubuntu3.2

Ubuntu 16.04 LTS:
samba 2:4.3.11+dfsg-0ubuntu0.16.04.13
samba-dsdb-modules 2:4.3.11+dfsg-0ubuntu0.16.04.13

Ubuntu 14.04 LTS:
samba 2:4.3.11+dfsg-0ubuntu0.14.04.14
samba-dsdb-modules 2:4.3.11+dfsg-0ubuntu0.14.04.14

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

References:
https://usn.ubuntu.com/usn/usn-3595-1
CVE-2018-1050, CVE-2018-1057

Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.6.7+dfsg-1ubuntu3.2
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.13
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.14.04.14

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