bitterzzzz/cve-2021-43297-pocProof-of-concept exploit for CVE-2021-43297, achieving remote code execution in Apache Dubbo <= 2.7.13 via Hessian-Lite deserialization.
Dubbo Hessian-Lite 3.2.11及之前版本中存在潜在RCE攻击风险。Hessian-Lite在遇到序列化异常时会输出相关信息，这可能导致触发某些恶意定制的Bean的toString方法，从而引发RCE攻击。
最开始的POC只能在Apache Dubbo<=2.7.8实现RCE，原理见先知文章(审核通过后回来修改)。投稿之后又研究了一下，可以在Apache Dubbo<=2.7.13实现RCE，原理分析见我的博客文章
效果如下
POC利用条件：
wget http://archive.apache.org/dist/zookeeper/zookeeper-3.3.3/zookeeper-3.3.3.tar.gz
tar zxvf zookeeper-3.3.3.tar.gz
cd zookeeper-3.3.3
cp conf/zoo_sample.cfg conf/zoo.cfg
vim conf/zoo.cfg
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
dataDir=/绝对路径/zookeeper-3.3.3/data
# the port at which the clients will connect
clientPort=2181
mkdir data
touch data/myid
cd /private/var/tmp/zookeeper-3.3.3/bin
./zkServer.sh start
git clone https://github.com/apache/dubbo-samples.git
cd dubbo-samples/dubbo-samples-api
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>dubbomytest</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>8</source>
<target>8</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<source.level>1.8</source.level>
<target.level>1.8</target.level>
<dubbo.version>2.7.6</dubbo.version>
<junit.version>4.12</junit.version>
<docker-maven-plugin.version>0.30.0</docker-maven-plugin.version>
<jib-maven-plugin.version>1.2.0</jib-maven-plugin.version>
<maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
<maven-failsafe-plugin.version>2.21.0</maven-failsafe-plugin.version>
<image.name>${project.artifactId}:${dubbo.version}</image.name>
<java-image.name>openjdk:8</java-image.name>
<dubbo.port>20880</dubbo.port>
<zookeeper.port>2181</zookeeper.port>
<main-class>org.apache.dubbo.samples.provider.Application</main-class>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
<version>2.7.3</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-common</artifactId>
<version>2.7.3</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper</artifactId>
<version>2.7.3</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.apache.xbean</groupId>
<artifactId>xbean-naming</artifactId>
<version>4.15</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
provider端和本地都需要安装，依赖如下
<dependency>
<groupId>org.apache.xbean</groupId>
<artifactId>xbean-naming</artifactId>
<version>4.15</version>
</dependency>
IDEA中添加dubbo-samples-api，注意修改zookeeper和dubbo的端口，另外在Application.java中修改代码：
service.setRegistry(new RegistryConfig("zookeeper://" + zookeeperHost + ":" + zookeeperPort+"/?timeout=250000"));
防止高版本dubbo连接zookeeper过慢而连接失败
在idea里面启动dubbo-samples-api中的Application.java
启动后输出dubbo service started即表示dubbo已启动
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-common</artifactId>
<version>2.7.3</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
<version>2.7.3</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper</artifactId>
<version>2.7.3</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>com.caucho</groupId>
<artifactId>hessian</artifactId>
<version>4.0.51</version>
</dependency>
编译ExecTest.java，随后在HttpServer.java中修改ExecTest.class的路径，然后执行HttpServer.main方法，最后执行HessianLitePoc.main方法