Ubuntu 4244-1: Samba vulnerabilities

    Date 21 Jan 2020
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in Samba.
    Ubuntu Security Notice USN-4244-1
    January 21, 2020
    samba vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 19.10
    - Ubuntu 19.04
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    Several security issues were fixed in Samba.
    Software Description:
    - samba: SMB/CIFS file, print, and login server for Unix
    It was discovered that Samba did not automatically replicate ACLs set to
    inherit down a subtree on AD Directory, contrary to expectations. This
    issue was only addressed in Ubuntu 18.04 LTS, Ubuntu 19.04 and Ubuntu
    19.10. (CVE-2019-14902)
    Robert Święcki discovered that Samba incorrectly handled certain character
    conversions when the log level is set to 3 or above. In certain
    environments, a remote attacker could possibly use this issue to cause
    Samba to crash, resulting in a denial of service. (CVE-2019-14907)
    Christian Naumer discovered that Samba incorrectly handled DNS zone
    scavenging. This issue could possibly result in some incorrect data being
    written to the DB. This issue only applied to Ubuntu 19.04 and Ubuntu
    19.10. (CVE-2019-19344)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 19.10:
      samba                           2:4.10.7+dfsg-0ubuntu2.4
    Ubuntu 19.04:
      samba                           2:4.10.0+dfsg-0ubuntu2.8
    Ubuntu 18.04 LTS:
      samba                           2:4.7.6+dfsg~ubuntu-0ubuntu2.15
    Ubuntu 16.04 LTS:
      samba                           2:4.3.11+dfsg-0ubuntu0.16.04.25
    In general, a standard system update will make all the necessary changes.
      CVE-2019-14902, CVE-2019-14907, CVE-2019-19344
    Package Information:

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