ESB-2018.0732 - [Ubuntu] samba: Multiple vulnerabilities 2018-03-14

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             AUSCERT External Security Bulletin Redistribution

                           Samba vulnerabilities
                               14 March 2018


        AusCERT Security Bulletin Summary

Product:           samba
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Administrator Compromise -- Existing Account      
                   Denial of Service        -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1057 CVE-2018-1050 

Reference:         ESB-2018.0731

Original Bulletin:

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USN-3595-1: Samba vulnerabilities

13 March 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


Several security issues were fixed in Samba.

Software Description

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


Bjorn 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

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

To update your system, please follow these instructions: https://

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


  * CVE-2018-1050
  * CVE-2018-1057

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