[Bug 1821566] Re: cron ignores whole crontab if one line has error

[Christian Kastner]

I'm afraid that this is by design, to prevent a malicious user from
dumping basically anything into one of the crontab directories.

An attacker once compromised a debian.org host by triggering a crafted
core dump in one of the crontab directories, and the daemon kept trying
to execute lines until it hit a valid one.

** Changed in: cron (Ubuntu)
       Status: New => Invalid

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Title:
  cron ignores whole crontab if one line has error

Status in cron package in Ubuntu:
  Invalid

Bug description:
  Ubuntu 18.04.


  Let's create error entry in /etc/crontab:

  00 09 * * 4 1 root /usr/local/bin/geoiprenew.sh

  restart cron

  systemctl restart cron


  мар 25 10:29:02 ovpn1 cron[12403]: Error: bad username; while reading /etc/crontab
  мар 25 10:29:02 ovpn1 cron[12403]: (*system*) ERROR (Syntax error, this crontab file will be ignored)

  Expected behavoir is only line with error is ignired.

  Thank you!

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