openssh bugs - Jun 2019 - [Bug 3021] New: Openssh/sftp question related to timezone difference with "ls -l"

https://bugzilla.mindrot.org/show_bug.cgi?id=3021

            Bug ID: 3021
           Summary: Openssh/sftp question related to timezone difference
                    with "ls -l"
           Product: Portable OpenSSH
           Version: 7.7p1
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: trivial
          Priority: P5
         Component: sftp
          Assignee: unassigned-bugs at mindrot.org
          Reporter: sebastian.woell at db.com

Hi team,

I am experiencing some strange behaviour when I run an ?ls -l? in an
sftp session (both server and client are openssh) ? and I am wondering
if the behaviour is a feature or a bug.

The issue occurs if server time zone differs from client time zone. And
I have also tested this with different combinations of openssh server
and client versions on different operating systems (AIX, Linux and
Solaris) ? the issue always exists.

The issue is the following:
When I run an ?ls ?l? in a dir, the timestamp of the files in the dir
are shown in server (remote) time zone. But if I run the ?ls ?l ? for a
specific file, the time is shown in client time zone.

Sample log of the connection:

Client: Openssh version 7.70.11.0, AIX 7.1, Timezone Europe/Berlin
Server: Openssh version 7.50.14.0, RHEL 7.4, Timezone Asia/Singapore

sftp> ls -l
-rwxr-xr-x    1 root     system       1267 Jun 19 15:05 test.sh
sftp> ls -l test.sh
-rwxr-xr-x    ? 0        0            1267 Jun 19 21:05 test.sh

What I also see is that in the ?ls ?l <filename>? version, the owner
and group are also no longer shown as names.
Is there anyone that can explain this to me?

Thanks,
Sebastian

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https://bugzilla.mindrot.org/show_bug.cgi?id=3021

Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX
                 CC|                            |djm at mindrot.org

--- Comment #1 from Damien Miller <djm at mindrot.org> ---
This was caused by the timestamps in sftp's ls being generated by the
client for the "ls -l file" case but the server for the "ls -l
dir"
case.

Since this bug was filed, sftp now generates "ls -l dir" on the client
if it is talking to a compatible sftp-server that supplies user/group
info. There unfortunately isn't much more we can do here to fix this.

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