OpenSSH remote DoS in Universal Robots CB 3.1

by vmayoral 4 years ago

macOS ◆ xterm-256color ◆ zsh 1960 views

We found that the Universal Robots Controllers’ file system based in Debian is subject to CVE-2016-6210 which allows attackers with networking connection to the robot to cause a Denial of Service (DoS). The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.

Affects:

Universal Robots CB3.1, firmware version 3.12.1
Universal Robots CB3.1, firmware version 3.12
Universal Robots CB3.1, firmware version 3.11
Universal Robots CB3.1, firmware version 3.10

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You can download this recording in asciicast v2 format, as a .cast file.

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<!DOCTYPE html>
<html>
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</head>
<body>
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      document.getElementById('player'),
      { cols: 198, rows: 55 }
    );
  </script>
</body>
</html>

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While this site doesn't offer GIF conversion at the moment, you can still do it yourself with the help of asciinema GIF generator utility - agg.

Once you have it installed run the following command to create GIF file:

agg https://asciinema.org/a/315015 315015.gif

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agg 315015.cast 315015.gif

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See agg manual for full usage instructions.