[Bug 1702529] Re: ACCESS_DENIED with symlinks within a root ("/") share

[Eric Desrochers]

** Also affects: samba (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Also affects: samba (Ubuntu Zesty)
   Importance: Undecided
       Status: New

** Also affects: samba (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: samba (Ubuntu Trusty)
   Importance: Undecided => Medium

** Changed in: samba (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: samba (Ubuntu Zesty)
   Importance: Undecided => Medium

** Changed in: samba (Ubuntu Trusty)
     Assignee: (unassigned) => Dariusz Gadomski (dgadomski)

** Changed in: samba (Ubuntu Xenial)
     Assignee: (unassigned) => Dariusz Gadomski (dgadomski)

** Changed in: samba (Ubuntu Zesty)
     Assignee: (unassigned) => Dariusz Gadomski (dgadomski)

** Changed in: samba (Ubuntu Trusty)
       Status: New => In Progress

** Changed in: samba (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: samba (Ubuntu Zesty)
       Status: New => In Progress

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to samba in Ubuntu.
https://bugs.launchpad.net/bugs/1702529

Title:
   ACCESS_DENIED with symlinks within a root ("/") share

Status in samba:
  Unknown
Status in samba package in Ubuntu:
  In Progress
Status in samba source package in Trusty:
  In Progress
Status in samba source package in Xenial:
  In Progress
Status in samba source package in Zesty:
  In Progress

Bug description:
  [Impact]

   * In case of accessing directories chdir to it directly instead of
  its parent directory. This changes how dir symlinks are handled in
  root shares and leads to avoiding the ACCESS_DENIED ISSUE.

  [Test Case]

   1. Prepare smb server with a share:
  [rootshare]
     guest ok = yes
     path = /
     wide links = no
     follow symlinks = yes
   2. On the server:
  mkdir -p /srv/dir
  ln -s /srv/dir /srv/symdir.
   3. Connect from a client:
  smbclient -m smb3 //server/rootshare -c "cd srv\symdir; dir"

  [Regression Potential]

   * When accessing broken symlinks share's base directory is accessed.
  This however seems to be consistent with a pre-fix behavior.

  [Other Info]

  Original bug description:

  See Samba bug: https://bugzilla.samba.org/show_bug.cgi?id=12873 for
  more information and test case. Also view LP bug:
  https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1701073 for more
  information.

To manage notifications about this bug go to:
https://bugs.launchpad.net/samba/+bug/1702529/+subscriptions