让PHP以ROOT权限执行系统命令的方法(2)

<?php
echo '<pre>';
$last_line = system('/var/www/html/http/ipt', $retval);
echo '
</pre>
<hr />Last line of the output: ' . $last_line . '
<hr />Return value: ' . $retval;
?>

在浏览器中浏览.

[color=Red]Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
Chain OUTPUT (policy ACCEPT)
target prot opt source destination [/color]
[color=Blue]my uid :48
my euid :0
after setreuid uid :0
afer sertreuid euid :48[/color]

--------------------------------------------------------------------------------
Last line of the output: afer sertreuid euid :48
--------------------------------------------------------------------------------
Return value: 0

该命令执行成功..
众所周知: apache的uid 为48. 调用setreuid后 将有效用户id 和实际用户id互换了.(必须在chmod u+s生效的情况下) 使apache当前的 uid为0 这样就能执行root命令了。

大家只需要更改 C文件中的 system所要执行的命令就可以实现自己的PHP执行root命令了.

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