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Re: unexpected behavior of cp and mv

From The Wanderer <wanderer@fastmail.fm>
Newsgroups linux.debian.user
Subject Re: unexpected behavior of cp and mv
Date 2020-04-30 22:00 +0200
Message-ID <A1nvI-243-17@gated-at.bofh.it> (permalink)
References <A1kxQ-hk-1@gated-at.bofh.it> <A1lke-Ow-13@gated-at.bofh.it> <A1nm2-20K-7@gated-at.bofh.it>
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On 2020-04-30 at 15:27, Alberto Sentieri wrote:

> I run tcpdump while running my simple program on both stretch and 
> buster. On stretch, x2 uses SMB (version 1, I guess) protocol, while
> on buster it uses SMB2 (version 2 or 3).
> 
> So, the problem can be solved by adding vers=1.0 to mount.cifs
> options. Any version from 2.0 and above will incur in the same
> utimensat error. I set vers to 1.0 and it worked properly.

Beware: this is a security hole. My understanding (based on experiences
in my workplace) is that the SMBv1 protocol is known to be inherently,
unfixably insecure, to the point that current Windows versions will not
speak it unless explicitly told to in an out-of-the-way and inconvenient
configuration location.

I would not consider forcing the use of SMBv1 to be a satisfactory
resolution, unless you can be 100% sure that nothing malicious will ever
be in a position to mess around here.

-- 
   The Wanderer

The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all
progress depends on the unreasonable man.         -- George Bernard Shaw

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Thread

unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 19:10 +0200
  Re: unexpected behavior of cp and mv Roberto C. Sánchez <roberto@debian.org> - 2020-04-29 19:20 +0200
    Re: Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 20:50 +0200
    Re: Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 21:20 +0200
      Re: unexpected behavior of cp and mv David Wright <deblis@lionunicorn.co.uk> - 2020-04-30 03:50 +0200
        Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 06:20 +0200
  Re: unexpected behavior of cp and mv Charles Curley <charlescurley@charlescurley.com> - 2020-04-29 21:20 +0200
    Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 22:10 +0200
      Re: unexpected behavior of cp and mv "Thomas Schmitt" <scdbackup@gmx.net> - 2020-04-29 22:20 +0200
        Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 22:30 +0200
        Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 23:00 +0200
          Re: unexpected behavior of cp and mv "Thomas Schmitt" <scdbackup@gmx.net> - 2020-04-29 23:30 +0200
            Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 06:40 +0200
              Re: unexpected behavior of cp and mv "Thomas Schmitt" <scdbackup@gmx.net> - 2020-04-30 12:40 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 16:20 +0200
            Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 18:50 +0200
              Re: unexpected behavior of cp and mv "Thomas Schmitt" <scdbackup@gmx.net> - 2020-04-30 19:40 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 20:10 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 21:50 +0200
                Re: unexpected behavior of cp and mv The Wanderer <wanderer@fastmail.fm> - 2020-04-30 22:00 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 22:10 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 23:40 +0200
              Re: unexpected behavior of cp and mv David Wright <deblis@lionunicorn.co.uk> - 2020-04-30 20:00 +0200
          Re: unexpected behavior of cp and mv songbird <songbird@anthive.com> - 2020-04-30 00:00 +0200
            Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 06:10 +0200

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