HTB Environment

Zsm published on 2025-06-02 included in 靶场

前言

一个很有意思的靶机，HTB中等难度

外网打点

按照惯例nmap+dirsearch

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nmap -sC -sV 10.10.11.67        
Starting Nmap 7.94SVN ( https://nmap.org ) at 2025-05-31 20:35 CST
Stats: 0:01:21 elapsed; 0 hosts completed (1 up), 1 undergoing Connect Scan
Connect Scan Timing: About 46.63% done; ETC: 20:38 (0:01:29 remaining)
Stats: 0:02:17 elapsed; 0 hosts completed (1 up), 1 undergoing Connect Scan
Connect Scan Timing: About 54.81% done; ETC: 20:39 (0:01:50 remaining)
Stats: 0:03:05 elapsed; 0 hosts completed (1 up), 1 undergoing Connect Scan
Connect Scan Timing: About 61.43% done; ETC: 20:40 (0:01:54 remaining)
Stats: 0:05:10 elapsed; 0 hosts completed (1 up), 1 undergoing Connect Scan
Connect Scan Timing: About 79.51% done; ETC: 20:42 (0:01:19 remaining)
Stats: 0:06:55 elapsed; 0 hosts completed (1 up), 1 undergoing Connect Scan
Connect Scan Timing: About 94.33% done; ETC: 20:43 (0:00:25 remaining)
Stats: 0:06:55 elapsed; 0 hosts completed (1 up), 1 undergoing Connect Scan
Connect Scan Timing: About 94.34% done; ETC: 20:43 (0:00:25 remaining)
Nmap scan report for 10.10.11.67
Host is up (1.1s latency).
Not shown: 998 closed tcp ports (conn-refused)
PORT   STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 9.2p1 Debian 2+deb12u5 (protocol 2.0)
| ssh-hostkey:
|   256 5c:02:33:95:ef:44:e2:80:cd:3a:96:02:23:f1:92:64 (ECDSA)
|_  256 1f:3d:c2:19:55:28:a1:77:59:51:48:10:c4:4b:74:ab (ED25519)
80/tcp open  http    nginx 1.22.1
|_http-title: Did not follow redirect to http://environment.htb
|_http-server-header: nginx/1.22.1
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

 python dirsearch.py -u http://environment.htb -w /Users/zsm/CTF/tool/kali_word/dirb/wordlists/big.txt     
  _|. _ _  _  _  _ _|_    v0.4.3
 (_||| _) (/_(_|| (_| )

Extensions: php, asp, aspx, jsp, html, htm | HTTP method: GET | Threads: 25 | Wordlist size: 20469

Target: http://environment.htb/

[20:45:45] Scanning:
[20:49:52] 301 -   169B - /build  ->  http://environment.htb/build/
[20:49:52] 301 -   169B - /build  ->  http://environment.htb/build/
[20:52:23] 200 -     0B - /favicon.ico
[20:55:04] 200 -    2KB - /login
[20:55:04] 302 -   358B - /logout  ->  http://environment.htb/login
[20:55:10] 405 -  244KB - /mailing
[20:58:33] 200 -    24B - /robots.txt
[21:00:09] 301 -   169B - /storage  ->  http://environment.htb/storage/
[21:01:19] 200 -    2KB - /up
[21:01:20] 405 -  244KB - /upload
[21:01:39] 301 -   169B - /vendor  ->  http://environment.htb/vendor/

Task Completed

有个很明显的登录页面，进去看看，随便输入试试有报错回显，但是目前不知道有什么可以打的地方

Litctf2025 Crypto

Zsm published on 2025-05-26 included in CTF

前言

赛时因为有其他的东西就没打，赛后复现，25号一晚上写完了，感觉除了背包其他的都还好

题目

basic

task.py

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from Crypto.Util.number import *
from enc import flag 

m = bytes_to_long(flag)
n = getPrime(1024)
e = 65537
c = pow(m,e,n)
print(f"n = {n}")
print(f"e = {e}")
print(f"c = {c}")

经典的n是大素数的问题

THM the London Bridge

Zsm published on 2025-05-26 included in 靶场

前言

一鼓作气，再刷一个，THM的一个中等靶机

外网打点

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nmap -sC -sV 10.10.207.41   
Starting Nmap 7.94SVN ( https://nmap.org ) at 2025-05-24 20:54 CST
Stats: 0:00:55 elapsed; 0 hosts completed (1 up), 1 undergoing Service Scan
Service scan Timing: About 50.00% done; ETC: 20:55 (0:00:20 remaining)
Stats: 0:01:01 elapsed; 0 hosts completed (1 up), 1 undergoing Service Scan
Service scan Timing: About 50.00% done; ETC: 20:56 (0:00:25 remaining)
Stats: 0:01:44 elapsed; 0 hosts completed (1 up), 1 undergoing Service Scan
Service scan Timing: About 50.00% done; ETC: 20:57 (0:01:08 remaining)
Nmap scan report for 10.10.207.41
Host is up (0.23s latency).
Not shown: 998 closed tcp ports (conn-refused)
PORT     STATE SERVICE    VERSION
22/tcp   open  ssh        OpenSSH 7.6p1 Ubuntu 4ubuntu0.7 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
|   2048 58:c1:e4:79:ca:70:bc:3b:8d:b8:22:17:2f:62:1a:34 (RSA)
|   256 2a:b4:1f:2c:72:35:7a:c3:7a:5c:7d:47:d6:d0:73:c8 (ECDSA)
|_  256 1c:7e:d2:c9:dd:c2:e4:ac:11:7e:45:6a:2f:44:af:0f (ED25519)
8080/tcp open  http-proxy gunicorn
|_http-title: Explore London
| fingerprint-strings:
|   GetRequest:
|     HTTP/1.0 200 OK
|     Server: gunicorn
|     Date: Sat, 24 May 2025 12:55:24 GMT
|     Connection: close
|     Content-Type: text/html; charset=utf-8
|     Content-Length: 2682
|     <!DOCTYPE html>
|     <html lang="en">
|     <head>
|     <meta charset="UTF-8">
|     <meta name="viewport" content="width=device-width, initial-scale=1.0">
|     <title>Explore London</title>
|     <style>
|     body {
|     font-family: Arial, sans-serif;
|     margin: 0;
|     padding: 0;
|     background-color: #f2f2f2;
|     header {
|     background-color: #333;
|     color: #fff;
|     padding: 10px 20px;
|     text-align: center;
|     background-color: #444;
|     color: #fff;
|     padding: 10px 20px;
|     text-align: center;
|     color: #fff;
|     text-decoration: none;
|     margin: 0 10p
|   HTTPOptions:
|     HTTP/1.0 200 OK
|     Server: gunicorn
|     Date: Sat, 24 May 2025 12:55:25 GMT
|     Connection: close
|     Content-Type: text/html; charset=utf-8
|     Allow: HEAD, GET, OPTIONS
|_    Content-Length: 0
|_http-server-header: gunicorn
1 service unrecognized despite returning data. If you know the service/version, please submit the following fingerprint at https://nmap.org/cgi-bin/submit.cgi?new-service :
...
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 178.62 seconds

没什么有用的，disearch启动

HTB Planning

Zsm published on 2025-05-25 included in 靶场

前言

好久没打靶机了，昨天睿抗校赛摸鱼打了一半，回宿舍打完了

外网打点

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❯ nmap -sC -sV 10.10.11.68 
Starting Nmap 7.94SVN ( https://nmap.org ) at 2025-05-24 14:57 CST
Stats: 0:00:31 elapsed; 0 hosts completed (1 up), 1 undergoing Connect Scan
Connect Scan Timing: About 99.99% done; ETC: 14:58 (0:00:00 remaining)
Stats: 0:00:32 elapsed; 0 hosts completed (1 up), 1 undergoing Connect Scan
Connect Scan Timing: About 99.99% done; ETC: 14:58 (0:00:00 remaining)
Nmap scan report for 10.10.11.68
Host is up (0.26s latency).
Not shown: 998 closed tcp ports (conn-refused)
PORT   STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 9.6p1 Ubuntu 3ubuntu13.11 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
|   256 62:ff:f6:d4:57:88:05:ad:f4:d3:de:5b:9b:f8:50:f1 (ECDSA)
|_  256 4c:ce:7d:5c:fb:2d:a0:9e:9f:bd:f5:5c:5e:61:50:8a (ED25519)
80/tcp open  http    nginx 1.24.0 (Ubuntu)
|_http-title: Did not follow redirect to http://planning.htb/
|_http-server-header: nginx/1.24.0 (Ubuntu)
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 48.18 seconds

把域名加到/etc/hosts里面，访问一下，发现没有明显的目标，扫目录

黄河流域CTF-crypto

Zsm published on 2025-05-25 included in CTF

前言

和睿抗校赛撞了，赛后看看题复现一下，感觉质量很一般

题目

Latice

task.py

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from Crypto.Util.number import *
from Crypto.Cipher import AES
import os
from secret import flag
import numpy as np


def gen(q, n, N, sigma):
    t = np.random.randint(0, high=q // 2, size=n)
    s = np.concatenate([np.ones(1, dtype=np.int32), t])
    A = np.random.randint(0, high=q // 2, size=(N, n))
    e = np.round(np.random.randn(N) * sigma**2).astype(np.int32) % q
    b = ((np.dot(A, t) + e).reshape(-1, 1)) % q
    P = np.hstack([b, -A])
    return P, s


def enc(P, M, q):
    N = P.shape[0]
    n = len(M)
    r = np.random.randint(0, 2, (n, N))
    Z = np.zeros((n, P.shape[1]), dtype=np.int32)
    Z[:, 0] = 1
    C = np.zeros((n, P.shape[1]), dtype=np.int32)
    for i in range(n):
        C[i] = (np.dot(P.T, r[i]) + (np.floor(q / 2) * Z[i] * M[i])) % q
    return C


q = 127
n = 3
N = int(1.1 * n * np.log(q))
sigma = 1.0

P, s = gen(q, n, N, sigma)


def prep(s):
    return np.array([int(b) for char in s for b in f"{ord(char):08b}"], dtype=np.int32)


C = enc(P, prep(hint), q)
P = P.tolist()
C = C.tolist()
print(f"{P=}")
print(f"{C=}")

第一眼看上去是格+aes，但是注意代码

Study_xss

Zsm published on 2025-05-09 included in Web

XSS原理

XSS的原理是恶意攻击者往 Web 页面里插入恶意可执行网页脚本代码，当用户浏览该页之时，嵌入其中 Web 里面的脚本代码会被执行，从而可以达到攻击者盗取用户信息或其他侵犯用户安全隐私的目的。