Ubuntu 3353-4: Samba vulnerability

    Date24 Jul 2017
    CategoryUbuntu
    60
    Posted ByLinuxSecurity Advisories
    Samba could allow unintended access to network services.
    ==========================================================================
    Ubuntu Security Notice USN-3353-4
    July 24, 2017
    
    samba vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 ESM
    
    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.
    
    Original advisory details:
    
     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 services or perform other attacks.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 ESM:
      libsmbclient                    2:3.6.25-0ubuntu0.12.04.12
    
    In general, a standard system update will make all the necessary
    changes.
    
    References:
      https://www.ubuntu.com/usn/usn-3353-4
      https://www.ubuntu.com/usn/usn-3353-1
      CVE-2017-11103
    
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