Ubuntu 4167-2: Samba vulnerabilities

    Date29 Oct 2019
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in Samba.
    Ubuntu Security Notice USN-4167-2
    October 29, 2019
    samba vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 14.04 ESM
    - Ubuntu 12.04 ESM
    Several security issues were fixed in Samba.
    Software Description:
    - samba: SMB/CIFS file, print, and login server for Unix
    USN-4167-1 fixed several vulnerabilities in Samba. This update provides
    the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
    Original advisory details:
     Michael Hanselmann discovered that the Samba client code incorrectly
     handled path separators. If a user were tricked into connecting to a
     malicious server, a remote attacker could use this issue to cause the
     client to access local pathnames instead of network pathnames.
     Adam Xu discovered that Samba incorrectly handled the dirsync LDAP control.
     A remote attacker with "get changes" permissions could possibly use this
     issue to cause Samba to crash, resulting in a denial of service. This issue
     only affected Ubuntu 14.04 ESM. (CVE-2019-14847)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 14.04 ESM:
      libsmbclient                    2:4.3.11+dfsg-0ubuntu0.14.04.20+esm3
      samba                           2:4.3.11+dfsg-0ubuntu0.14.04.20+esm3
    Ubuntu 12.04 ESM:
      libsmbclient                    2:3.6.25-0ubuntu0.12.04.19
      samba                           2:3.6.25-0ubuntu0.12.04.19
    In general, a standard system update will make all the necessary changes.
      CVE-2019-10218, CVE-2019-14847
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