[Samba] Recent inability to view long filenames stored with scp via samba mount

Sun Nov 3 11:37:57 UTC 2019

Greetings Samba team,

It has been a long time since I needed to ask a Samba technical question.

Server and workstation are both running the latest Samba packages via Ubuntu 16.04 LTS. I recently applied the security updates... actually that was yesterday I applied them.

> samba (2:4.3.11+dfsg-0ubuntu0.16.04.23) xenial-security; urgency=medium
>
>   * SECURITY UPDATE: client code can return filenames containing path
>     separators
>     - debian/patches/CVE-2019-10218-1.patch: protect SMB1 client code
>       from evil server returned names in source3/libsmb/clilist.c,
>       source3/libsmb/proto.h.
>     - debian/patches/CVE-2019-10218-2.patch: Protect SMB2 client code
>       from evil server returned names in source3/libsmb/cli_smb2_fnum.c.
>     - CVE-2019-10218
>   * SECURITY UPDATE: User with "get changes" permission can crash AD DC
>     LDAP server via dirsync
>     - debian/patches/CVE-2019-14847-1.patch: ensure attrs exist in
>       source4/dsdb/samdb/ldb_modules/dirsync.c.
>     - debian/patches/CVE-2019-14847-2.patch: demonstrate the correct
>       interaction of ranged_results style attributes and dirsync in
>       source4/dsdb/tests/python/dirsync.py.
>     - debian/patches/CVE-2019-14847-3.patch: correct behaviour of
>       ranged_results when combined with dirsync in
>       source4/dsdb/samdb/ldb_modules/dirsync.c,
>       source4/dsdb/samdb/ldb_modules/ranged_results.c.
>     - CVE-2019-14847
>
>  -- Marc Deslauriers <marc.deslauriers at ubuntu.com>  Mon, 21 Oct 2019 08:53:51 -0400 

I have Samba shares mounted to my Linux workstation. Mostly I access files on the Samba server over the Samba mount. I use mount.cifs to bring up these mounts.

For a couple of special cases, I use scp to transfer files between the server and workstation. Special characters in filenames give sending them over the Samba mount trouble, so that is one case I 
have used scp in place of using the Samba mount.

To back up my Rhythembox music I use scp. I loaded some more music to Rhythembox yesterday, so remembered to back up Rhythembox to the server this morning. The scp command works flawlessly as ever.

$ bin/rsync_ldslnx01rhythmbox.sh
sending incremental file list

sent 268 bytes  received 15 bytes  188.67 bytes/sec
total size is 1,467,438  speedup is 5,185.29
sending incremental file list
Alfred Brendel/
Alfred Brendel/Beethoven Piano Sonatas Vol I/
Alfred Brendel/Beethoven Piano Sonatas Vol I/Disc 1 - 01 - Piano Sonata No. 29 in B-flat major, op. 106 "Hammerklavier": I. Allegro.mp3
      12,279,216 100%   13.53MB/s    0:00:00 (xfr#1, ir-chk=1025/1221)
Alfred Brendel/Beethoven Piano Sonatas Vol I/Disc 1 - 02 - Piano Sonata No. 29 in B-flat major, op. 106 "Hammerklavier": II. Scherzo.mp3
       2,795,290 100%    2.43MB/s    0:00:01 (xfr#2, ir-chk=1024/1221)
Alfred Brendel/Beethoven Piano Sonatas Vol I/Disc 1 - 03 - Piano Sonata No. 29 in B-flat major, op. 106 "Hammerklavier": III. Adagio sostenuto.mp3
      17,269,725 100%   10.59MB/s    0:00:01 (xfr#3, ir-chk=1023/1221)
Alfred Brendel/Beethoven Piano Sonatas Vol I/Disc 1 - 04 - Piano Sonata No. 29 in B-flat major, op. 106 "Hammerklavier": IV: Largo; Allegro risoluto.mp3
      13,683,591 100%    7.61MB/s    0:00:01 (xfr#4, ir-chk=1022/1221)
Alfred Brendel/Beethoven Piano Sonatas Vol I/Disc 1 - 05 - Piano Sonata No. 32 in C minor, op. 111: I. Maestoso; Allegro con brio e appassionato.mp3
       8,842,054 100%    5.77MB/s    0:00:01 (xfr#5, ir-chk=1021/1221)
Alfred Brendel/Beethoven Piano Sonatas Vol I/Disc 1 - 06 - Piano Sonata No. 32 in C minor, op. 111: II. Arietta; Adagio molto, semplice e cantabile.mp3
      16,239,680 100%    8.41MB/s    0:00:01 (xfr#6, ir-chk=1020/1221)

(and so on...)

ssh to the sever to validate the files got there...

mdlueck at ldslnx01:/srv/shares/data/Nodes/jacob/home/mdlueck/Music/Alfred Brendel$ find
.
./Beethoven Piano Sonatas Vol I
./Beethoven Piano Sonatas Vol I/Disc 1 - 01 - Piano Sonata No. 29 in B-flat major, op. 106 "Hammerklavier": I. Allegro.mp3
./Beethoven Piano Sonatas Vol I/Disc 1 - 02 - Piano Sonata No. 29 in B-flat major, op. 106 "Hammerklavier": II. Scherzo.mp3
./Beethoven Piano Sonatas Vol I/Disc 1 - 03 - Piano Sonata No. 29 in B-flat major, op. 106 "Hammerklavier": III. Adagio sostenuto.mp3
./Beethoven Piano Sonatas Vol I/Disc 1 - 04 - Piano Sonata No. 29 in B-flat major, op. 106 "Hammerklavier": IV: Largo; Allegro risoluto.mp3
./Beethoven Piano Sonatas Vol I/Disc 1 - 05 - Piano Sonata No. 32 in C minor, op. 111: I. Maestoso; Allegro con brio e appassionato.mp3
./Beethoven Piano Sonatas Vol I/Disc 1 - 06 - Piano Sonata No. 32 in C minor, op. 111: II. Arietta; Adagio molto, semplice e cantabile.mp3

Good!

View across the mount.cifs share to my workstation...

mdlueck at jacob:/mnt/ldslnx01/data/Nodes/jacob/home/mdlueck/Music/Alfred Brendel$ find
.
./Beethoven Piano Sonatas Vol I
./Beethoven Piano Sonatas Vol I/DTCML9~Y.MP3
./Beethoven Piano Sonatas Vol I/DQIP6H~S.MP3
./Beethoven Piano Sonatas Vol I/DKU9ZS~P.MP3
./Beethoven Piano Sonatas Vol I/D4K1AV~O.MP3
./Beethoven Piano Sonatas Vol I/DIVFAH~2.MP3
./Beethoven Piano Sonatas Vol I/DWMU18~G.MP3
./Beethoven Piano Sonatas Vol I/DDDAFP~U.MP3
./Beethoven Piano Sonatas Vol I/DIYJ3G~3.MP3
./Beethoven Piano Sonatas Vol I/DQYYDL~5.MP3

Yikes!! Why is Samba not showing the long version of file names actually successfully on the server suddenly?

Did something go wrong after yesterday's update?

I am thankful,

-- 
Michael Lueck
Lueck Data Systems
http://www.lueckdatasystems.com/