Hi Axis, Thanks for the detailed bug report :)
I did some digging into the issue. Here are my findings so far: The feature is no longer supported for newer (safer) SMB protocol versions. See [1]. This issue was reported upstream (and eventually dropped) on [2], which originated from [3] where the issue is described with more details. The regression was introduced in this upstream commit [4]. The relevant code was refactored later in [5]. While patching the code downstream may have security implications (I will bring this to upstream), a workaround exists: run with the reported command with the following option $ smbclient -NL localhost --option 'client use spnego = no' Alternativelly, in the general section in smb.conf set client use spnego = no For newer versions (verified in samba 4.14), you should also set the protocol. For instance $ smbclient -NL localhost --option 'client use spnego = no' --option 'client max protocol = NT1' Note that the "use spnego" option is deprecated since samba 4.13, and will be removed [6] (I will also bring this up upstream). Finally, it is worth to mention that the changes which introduced this regression are related to known vulnerabilities. See [7] and [8] for further reference. [1] https://bugzilla.samba.org/show_bug.cgi?id=12863 [2] https://bugzilla.samba.org/show_bug.cgi?id=12061 [3] https://bugzilla.samba.org/show_bug.cgi?id=11849#c14 [4] e72ad193a53e20b769f798d02c0610f91859bd38 [5] 5b8ed5009bb4868c1391841193a3911fb0681cb5 [6] https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html#CLIENTUSESPNEGO [7] https://www.samba.org/samba/security/CVE-2016-2110.html [8] https://www.samba.org/samba/security/CVE-2016-2111.html ** Changed in: samba (Ubuntu) Assignee: (unassigned) => Athos Ribeiro (athos-ribeiro) ** Changed in: samba (Ubuntu) Status: New => Confirmed ** Bug watch added: Samba Bugzilla #12863 https://bugzilla.samba.org/show_bug.cgi?id=12863 ** Bug watch added: Samba Bugzilla #12061 https://bugzilla.samba.org/show_bug.cgi?id=12061 ** Bug watch added: Samba Bugzilla #11849 https://bugzilla.samba.org/show_bug.cgi?id=11849 ** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2016-2110 ** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2016-2111 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1926119 Title: Server Browse List missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1926119/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
