[Bug 1572876] Re: After Samba upgrade can't access unpassworded windows share

[chuckz]

I get the following errors upon using smbtree command:

NTLMSSP packet check failed due to short signature (0 bytes)!
NTLMSSP NTLM2 packet check failed due to invalid signature!

Trying to connect to a Windows PC gets me a logon box asking for password, even though my Windows shares have not password set.
It started after upgrade to Ubuntu 16.04 including Samba 4.3.8

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Title:
  After Samba upgrade can't access unpassworded windows share

Status in samba:
  Unknown
Status in samba package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 14.04.4 LTS X64
  On 19th april got an update. mainly there was Samba's update, after that, can't  access  anymore to unpassworded share on Win7, login and password requested, but there is no password

  smbclient -N -L 192.168.1.55
  WARNING: The "syslog" option is deprecated
  NTLMSSP packet check failed due to short signature (0 bytes)!
  NTLMSSP NTLM2 packet check failed due to invalid signature!
  Anonymous login successful
  Domain=[VORON] OS=[Windows 7 Professional 7601 Service Pack 1] Server=[Windows 7 Professional 6.1]

   Sharename       Type      Comment
   ---------       ----      -------
  Error returning browse list: NT_STATUS_ACCESS_DENIED
  Connection to 192.168.1.55 failed (Error NT_STATUS_RESOURCE_NAME_NOT_FOUND)
  NetBIOS over TCP disabled -- no workgroup available
  ========================
  upgrade log:
  Start-Date: 2016-04-19  09:04:37
  Commandline: aptdaemon role='role-commit-packages' sender=':1.258'
  Upgrade: python-samba:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), winbind:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), tdb-tools:amd64 (1.2.12-1, 1.3.8-0ubuntu0.14.04.1), samba:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), python-tdb:amd64 (1.2.12-1, 1.3.8-0ubuntu0.14.04.1), libtevent0:amd64 (0.9.19-1, 0.9.26-0ubuntu0.14.04.1), samba-dsdb-modules:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), libnss-winbind:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), samba-common-bin:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), libldb1:amd64 (1.1.16-1ubuntu0.1, 1.1.24-0ubuntu0.14.04.1), libtdb1:amd64 (1.2.12-1, 1.3.8-0ubuntu0.14.04.1), samba-libs:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), virtualbox-5.0:amd64 (5.0.16-105871~Ubuntu~trusty, 5.0.18-106667~Ubuntu~trusty), smbclient:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), libtalloc2:amd64 (2.1.0-1, 2.1.5-0ubuntu0.14.04.1), python-talloc:amd64 (2.1.0-1, 2.1.5-0ubuntu0.14.04.1), libpam-winbind:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), libwbclient0:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), samba-vfs-modules:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), python-ldb:amd64 (1.1.16-1ubuntu0.1, 1.1.24-0ubuntu0.14.04.1), samba-common:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2), libsmbclient:amd64 (4.1.6+dfsg-1ubuntu2.14.04.13, 4.3.8+dfsg-0ubuntu0.14.04.2)

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