【安全牛学习笔记】Linux缓冲区溢出

【安全牛学习笔记】Linux缓冲区溢出

Linux缓冲区溢出

FUZZING  

Crossfire 

1.9.0版本接受入展socket连接时攒在缓冲区溢出漏洞 

调试工具

 edb

运行平台

Kali i486虚拟机                                 

root@kali:~# cd /usr/games/

root@kali:/usr/games# ls

crossfire

root@kali:/usr/games#  rm -rf crossfire

root@kali:~# mv /usr/games/

root@kali:~# cd /usr/games/

root@kali:/usr/games# ls

root@kali:/usr/games# tar zxpf

root@kali:/usr/games# ls

crossfile

root@kali:/usr/games# ls -l

total 4860

drwxr-xr-x 8 root root    4096 Feb 10  2010 crossfire

-rwxrwx--- 1 root root 4968636 Aug 31 09:12

root@kali:/usr/games# cd crossfire/

root@kali:/usr/games/crossfire# ls

bin  etc  lib  man  share  var

root@kali:/usr/games/crossfire# cd bin/

root@kali:/usr/games/crossfire/bin# ls

crossedit  crossfire-config  crossloop-pl   player_dl.pl

crossfire  crossloop         crossloop.web

root@kali:/usr/games/crossfire/bin# ./crossfire

Unable to open /var/log/crossfire/logfile as the logfile - will use stderr instead

Couldn't find archetypt horn_waves

Warning: failed to find arch horn_waves

Couldn't find treasurelist sarcophagus

Filed to link treasure to arch (sarcophagus_container): sarcophagus

Welcome to CrossFile. v1.9.0

Copyright (C) 1994 Mark Wedel

Copyright (C) 1992 Frank Tore Johansen.

----------registering SIGPIPE

Initializing plugins

Plugins directory is /usr/games/crossfire/lib/crossfir/plugins/

 -> Loading plugin : cfpython.so

Error trying to load /usr/games/crossfire/lib/crossfir/plugins/cfpython.so: lib

python2.5.so.1.0: cannot open shared object file: No such file or directory

 -> Loading plugin : cfpython.so

CFAnim 2.0a init

CFAnim 2.0a post init

Warting

逆向工程---->edb-debugger

             ollydbg

FUZZING                                                                       

本机调试                                                                      

    iptables -A INPUT -p tcp --destination-port 4444 ! -d 127.0.0.1 -j DROP  

    iptables -A INPUT -p tcp --destination-port 13327 ! -d 127.0.0.1 -j DROP 

root@kali:/usr/games/crossfire/bin# iptables -A INPUT -p tcp --destination-port 4444 ! -d 127.0.0.1 -j DROP

root@kali:/usr/games/crossfire/bin# iptables -A INPUT -p tcp --destination-port 13327 ! -d 127.0.0.1 -j DROP

root@kali:/usr/games/crossfire/bin# iptables -L

Chain INPUT (policy ACCEPT)

target     prot opt source               destination         

DROP       tcp  --  anywhere            !localhost            tcp dpt:4444

DROP       tcp  --  anywhere            !localhost            tcp dpt:13327

Chain FORWARD (policy ACCEPT)

target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)

target     prot opt source