Comment 22 for bug 1342400

Instead of a cronjob or compiling the patch, you also could add a rsyslog-filter in /etc/rsyslog.conf:
# put this line before the line with *.*;auth,authpriv.none -/var/log/syslog
    :msg, contains, "Invalid response packet from host" stop
#then restart rsyslog to apply the settings
sudo service rsyslog restart