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[Launchpad Bug Tracker <1701073@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package samba - 2:4.4.5+dfsg-2ubuntu5.7

---------------
samba (2:4.4.5+dfsg-2ubuntu5.7) yakkety-security; urgency=medium

  * d/p/non-wide-symlinks-to-directories-12860.patch: fix a CVE-2017-2619
    regression which breaks symlinks to directories on certain systems
    (LP: #1701073)

 -- Andreas Hasenack <andreas@xxxxxxxxxxxxx>  Fri, 30 Jun 2017 17:02:20
-0300

** Changed in: samba (Ubuntu Yakkety)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1701073

Title:
  CVE-2017-2619 regression breaks symlinks to directories

Status in samba:
  Unknown
Status in samba package in Ubuntu:
  Fix Released
Status in samba source package in Xenial:
  Fix Released
Status in samba source package in Yakkety:
  Fix Released
Status in samba source package in Zesty:
  In Progress

Bug description:
  Found in current version in Xenial (4.3.11+dfsg-0ubuntu0.16.04.7).
  When share's path is '/', symlinks do not work properly from Windows
  client. Gives "Cannot Access" error.

  To reproduce:

  1. Install samba and related dependencies

  apt install -y samba

  2. Add a share at the end of the default file that uses '/' as the
  path:

  [reproducer]
          comment = share
          browseable = no
          writeable = yes
          create mode = 0600
          directory mode = 0700
          path = /

  3. Attempt to access a symlink somewhere within the path of the share
  with a Windows client.

  4. Receive "Windows cannot access..." related error

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