[Bug 1701073] Re: CVE-2017-2619 regression breaks symlinks

[ChristianEhrhardt]

Adding update-regression until provde that it is not.
It is too late to stop the updates with that (~3 months) but still tagging correctly seems right.

@Marc - since you backported the CVE could you take a look?

@Dave - Could you share your testcase (I assume you have a script of
some sort)

@Andreas - once Dave shared his test, do you think we could make a
subset of the testcase into the dep8 tests you have started to add.
Extending the md5sum checks with something like a symlink creation and
path checks?


** Tags added: update-regression

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

Title:
  CVE-2017-2619 regression breaks symlinks

Status in samba:
  Unknown
Status in samba package in Ubuntu:
  New

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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